MEDLE DEVQNIAN G$TRACQD$ FROM THE
FERKQN PQINT FORMAfiON, CHEBOYGAN
AND. PRESQUE £SLE CSUNTEES, MECHEGAN

Thesis for Hue Deg?” of M. S.
MICHIGAN STATE UNWERSITY

Gholam Sorrwar

1961

 

mm mm m II» III mm Lu: Mil 1min waning ll

3 1293

L I B R A R Y
Michigan State
University

MIDDLE DEVONIAN CSTRACODS FROM THE FERRCN POINT FORMATION,

CHEBOYGAN AND PRESQUE ISLE COUNTIES, KICHIGAN

By

Gholam Sorrwar

A THESIS

Submitted to
Michigan State University
in partial fulfillment of the requirements
for the degree of

Department of Geology

1961

MIDDLE DEVONIAN OSTRACODS FROM THE FERRON POINT FORMATION,
CHEBOYGAN AND PRESQUE ISLE COUNTIES, MICHIGAN

By Gholam Sorrwar

Ostracods from five outcrop localities of the Ferron
Point formation of the Middle Devonian Traverse group of
Cheboygan and Presque Isle Counties, Michigan, are studied
in this work. Fifty-one species distributed among thirty-
one genera belonging to 12 families and four superfamilies
are identified. One genus and two species are new.

The most numerous of all Ferron Point ostracod fam-
ilies are the Quasillitidae and next to those in abundance
are the Kloedenellidae. Other forms are fairly abundant

or common and some are quite rare.

ii

ACKNOWLEDGJENTS

The writer is deeply indebted to Dr. Jane E. Smith
of the Department of Geology, Michigan State University,
for suggesting this project, for helping in preparing the
manuscript, for donating the materials, for guiding in the
study of the specimens and for supplying the writer with
necessary printed materials and useful information to work
on the project. Dr. Smith gave freely of her time and know—
ledge to the writer all through the work in preparing this
paper.

To Dr. Chilton E. Prouty, Head of the Department
of Geology, Professor Dr. William A. Kelly, retired, and
Dr. James H. Fisher, Department of Geology, Michigan State
University, the writer expresses his gratitude for helping
him with valuable suggestions, important information, and
encouragement as members of his guidance committee and teach-
ers. Life-long indebtedness is owed to Dr. Prouty, Dr. Smith
and all other teachers of the Geology Department for their
high standard of quality taught with unparalleled patience
and constancy and for their assistance, sympathy, affection
and friendliness that the writer always encountered in them.

The writer is thankful to Mr. David V. Lemons, a
Ph.D. student of Geology, Michigan State University, for
helping him in various ways in this work.

Finally, to Mr. Arthur S. Craner, a former Geology

iii

iv

student of this institution, and his wife, the writer ex-
presses his thanks for assisting him to visit and check

the fossil localities of the present study and to collect

more materials.

O O O O 2
O O O O 4

INTECDJCTICA. . . . . . . . . . . . . . . . .
PnEVIOUS WORK . . . . . . . . . . . . . . . .
STRATIGRAPHY AND COIm ELATION. . . . . . . . .
F . 1. CONREL TIOJ OF NAIET GEOLOGIC UNITS II\

TF‘VERSE GROUP IN CZIARLEVOIK, CNEBC GAN,
PAESIUE ISLE, AND ALPEN. C'”NTIES IICHIGAF. 6
AHIEEIAIA . . . . . . . . . . . . . . . . . . . . . . 10
FIG. 2. FOSSIL LOCALITIES OF TAE FEEION POINT FCRNA-
TICK, CHEBOYGAN AND PASS QUE" ISLE COUNT IE
N GAIGAN . . . . . . . . . . . . . . . . . . ll
REGISTZA OF LOCALITIES . . . . . . . . . . . . . . . 13
SYST‘AATIC DESCAIPIIONS . . . . . . . . . . . . . . . 15
Family Leperditellidae . . . . . . . . . . . 15
Family Hollinidae. . . . . . . . . . . . . . 17
Family Drepanellidae . . . . . . . . . . . . 20
Family Kloedenellidae. . . . . . . . . . . . 21
Family Primitidae. . . . . . . . . . . . . . 24
Family Cytherellidae . . . . . . . . . . . . 25
Family Thlipsuridae. . . . . . . . . . . . . 29
Family airdiidae. . . . . . . . . . . . . . 31
Family Quasillitidae . . . . . . . . . . . . 35
Family Barychilinidae. . . . . . . . . . . . 43
Family Entomidae . . . . . . . . . . . . . . 45
Family incertae cedis. . . . . . . . . . . . 46
CHART I. OCCUA.‘NCE OF SPECIES If FERRCN POINT FOE-
NATION OF CAEECYGAL AND PNESAUE ISLE CCJNTIES
OF NICAIGAN. . . . . . . . . . . . . . . . . 48

g)

CONCLUSION.

LITERATURE CITED.

EXPLANATION OF PLATE I.

PLATE I

50
56

68

INTRODUCTION

The Ferron Point formation belongs to the Middle
Devonian Traverse group. The type locality of the forma-
tion is the Rockport quarry of Kelley's Island Lime and
Transport Company at Rockport, Alpena County, Michigan, and
the type section is exposed on the west walls of the quarry.

The Middle Devonian limestones and shales of the
Traverse group in Michigan, as a whole, have furnished the
paleontologists with a diverse series of large fossils, but
comparatively little is known of the abundant and well-pre-
served microscopic forms. Because of their use in identi-
fying strata encountered in drilling wells for oil these
small fossils are of particular importance at the present
time. Among the microscopic species those of ostracods are
well-adapted for this work because of their relatively short
time ranges.

The Ferron Point formation is one of the most richly
fossiliferous beds of the Traverse group and it contains
numerous ostracod fossils. But the ostracods of this forma-
tion have not been thoroughly studied. With the purpose of
completing this unfinished work, the present study was under-
taken as a project suggested by Dr. Jane E. Smith, Depart-

ment of Geology, Michigan State University.

PREVIOUS WORK

The state geologists have been attracted by the
outcr0ps of limestones and shales in the northern and the
northeastern counties of the Southern Peninsula of Nichigan
since the early decades of the nineteenth century, shortly
after 1837 when the Geological Survey of Michigan was es-
tablished. Geological studies have been carried on in this
region since that time and in almost every decade some worker
has contributed something to build up the present geological
knowledge of the area. It was only in 1955 that A. S. War-
thin, Jr., and G. A. Cooper first defined and described the
Ferron Point formation. Before that time many of the geolo-
gists, who studied the Middle Devonian Traverse group of
Michigan, described the lithologic characters of the Ferron
Point beds as a part of the Long Lake Series. None of them
gave these beds a formational status. I

H. M. Martin (1937), B. F. Hake and J. B. Maebius
(1937), w. A. Kelly and G. w. Smith (1947), and G. v. Cohee
(1947) described the Ferron Point formation in their papers
but none of these authors described any microfossils from
this formation. They were confined mostly to lithologic
descriptions and/or megafossils of the beds. No papers
had been written exclusively on the ostracods of the Ferron

Point formation before 1952, when R. V. Kesling published

his article on ostracods of the Family Hollinidae from the

 

Ferron Point formation of Michigan. In 1954, R. V. Kesling,
in his second paper on the Ferron Point ostracods, described
a new species of Phlictiscapha. In 1934, however, A. S.
Warthin, Jr., used samples from the Ferron Point formation,
which was then included in the Long Lake Series, in his
article, "The Ostracods of the Traverse group."

Dr. Jane E. Smith in 1959 studied ostracods from
the Traverse group of northwestern Lower Peninsula of Rich-
igan in preparation of her Ph.D. dissertation entitled
"Ostracods from the Middle Devonian Traverse group of Emmet

and Charlevoix Counties of Michigan."

STRATIGRAPHY AND CORRELATIONS

As a formation of the Middle Devonian Traverse group
the Ferron Point occupies about the middle part of the Lower
Traverse group in the stratigraphic column.

The Ferron Point formation was first defined and
described by A. S. Warthin, Jr., and G. A. Cooper in 1935.
Their original description of the formation is:

Green to bluish clays, interbedded with argil-
laceous limestones, all carrying an abundance of
fossils. Overlain directly by the calcareous shale
of the Genshaw formation and underlain by the Rock-
port limestone.* Thickness approximately thirty-five
feet. Type locality, Rock ort quarry, Rockport,

Alpena County, Michigan. Warthin and Cooper, 1935,
p. 526).

The name of the formation is taken from Ferron Point
situated on Lake Huron in Presque Isle County but the type
locality and the type section are in Alpena County, Michigan.
Type locality is the Rockport quarry which is an abandoned
quarry of Kelley's Island Lime and Transport Company (Great
Lakes Stone and Lime Company) at Rockport, Sec. 6, T.32 N.,
R.9 E., Alpena County, Michigan. The type section is ex-
posed on the western walls of the quarry about half a mile

west of the crusher. This is locality 38 of the Geological

Survey of Michigan. Here the top of the section is covered

 

*The name was later changed to "Rockport Quarry
limestone“ by the same authors (G. A. Cooper and A. S. War-
thin: Jour. Wash. Acad. Sci., Vol. 31, p. 261, 1941.)

and so the contact between Ferron Point formation and the
overlying Genshaw formation is not determined.

In the abandoned shale quarry of the Alpena Port-
land Cement Company, locality 51 of the Geological Survey
of Michigan, which is about 1 mile east and one-eighth mile
north of Genshaw School and 8 miles northeast of Alpena,
Alpena county, SE%, SEC. 18, T032 No, R09 E0, some beds
are exposed at higher level than the Ferron Point beds in
the Rockport quarry. These beds are referred to the Ferron
Point formation and are considered upper beds of the forma-
tion. Here the base of the formation is not exposed.

The stratigraphic position of the Ferron Point for-
mation in the Traverse section in Thunder Bay region of
Michigan was described by A. S. Warthin, Jr., and G. A.
Cooper (1945, P. 579) as follows (Fig. l):

Squaw Bay limestone

Thunder Bay limestone

Potter Farm formation

Norway Point formation

Four Mile Dam formation

Alpena limestone

Dock Street Clay member
Newton Creek limestone
Genshaw formation

Killians member

Ferron Point formation

Rockport Quarry limestone

Bell Shale

W. A. Kelly and G. W. Smith (1947, p. 50) showed
the stratigraphic position of the Ferron Point formation

of the Traverse rocks in Afton-Onaway area as follows (Fig.

l):

CORRELATION OF NAAED GEOLOGIC UNITS IN TRAVERSE GROUP IN
CHARLEVOIX, CHEBOYGAN, PRESQUE ISLE, AND ALPENA COUNTIES,

MICHIGAN

 

EMMET & CHARLEVOIX

CHEBOYGAN & WESTERN

ALPENA & EASTERN

 

 

 

 

 

 

 

COUNTIES PRESQUE ISLE COUNTIES PRESQUE ISLE COUNTIES
POHL KELLY-1944 WARTHIN,& COOPER—1943
1930 G. W. SMITH-1944 COOPER & WAITHIN—1941

SQUAW BAY
LINESTONE
THUNDER BAY
PETOSKEY BEEBE SCHOOL LIMESTONE
FORMATION FOREATION POTTER FARM
FORMATION
CHARLEVOIX NORWAY POINT
FORMATION
STAGE

FOUR—MILE DAN
LIMESTONE

 

GRAVEL POINT STAGE

 

 

UNEXPOSED

GRAVEL POINT FORMATION
GORBUT MEMBER

KOEHLER
LIMESTONE

OCK ST.
CLAY

ALPENA LIMESTONE

 

NEWTON CREEK
LINESTCNE

 

KILLIANS MEMBER

KILLIANS MEMBER

 

 

GENSHAW FORMATION

 

GENSHAW FORMATION

 

 

FERRON POINT FORMATION

FERRON POINT FORN TION

 

ROCKPORT QUARRY LS.

ROCKPORT QUARRY LS.

 

 

UNEXPOSED

BELL SHALE

 

 

After Kelly and Smith, 1947, p. 450, Fig. 2.

Fig. 1

 

Beebe School formation

Gravel Point formation - Gorbut member
Koehler limestone

Genshaw formation - Killians member
Ferron Point formation

Rockport Quarry limestone

The lithology and sequence of beds of the Ferron
Point formation exposed in Rockport quarry (type locality)
and in the shale quarry of Alpena Portland Cement Company
are produced in tabular form by A. S. Warthin, Jr., and
G. A. Cooper (1943, pp. 581-582), and in the Guide Book
of Seventh Annual Field Excursion of the Hichigan Academy
of Science, Arts, and Letters, Section of Geology and Min-
eralogy (May 29-30, 1937). The generalized forms of the
tables are as follows:
Type locality and type section, locality 38 of the
Geological Survey of Michigan:
Ferron Point formation:
7. Shale, gray, calcareous -- 6 inches thick
6. Limestone, gray -— 2 feet 8 inches thick
Characteristic megafossils: Prismatgphyllum,
many cup corals, crinoid columnEIs
5. Shale, gray, calcareous -- 1 foot 1 inch thick
Characteristic megafossils: Prismatophyllum,
SchiZOphoria
4. Limestone, a gray, massive, argillaceous bed
weathering yellow —— 1 foot 10 inches thick
Characteristic megafossils: Atrypa cf. reticu—

laris, Prismatophyllum, cup corals, massive
Bryozoa

 

3. Claystone, bluish gray -- 1 foot 10 inches thick
Characteristic megafossils: Spirifer cf. mucro-

natus, Camarotoechia, fenestellids
2. Limestone, blue-gray, argillaceous -- 1 foot

8 inches thick

Characteristic megafossils: Prismatophyllum
l. Claystone, bluish gray; limestone lenses -— 9

feet thick

Characteristic megafossils: ABUNDANT- Atrypa,

Athyris, Cyrtina alpenensis, Stropheodonta cf.

 

demissa, Spirifer cf. mucronatus, large Cera—
topora, Pholidostrqphia; CCmmON- Prismatophyl—
lug, cup corals, dumose Favosites, Aulopora
conferta, Hederella, massive and fenestellid
bryozoans, Cyrtina cf. hamiltonensis, large
Pentameralla, Schizophoria, Stropheodonta cf.
erratica; RARE— Chonetes cf. fragilis, Camaro-
toechia (Bell shale type), Schuchertella, Pro-
ductella.

 

 

 

 

 

 

 

 

 

 

 

 

 

Total thickness of Ferron Point formation here is
18 feet 7 inches.
Locality 51 of the Geological Survey Of Michigan:

Ferron Point formation-
2. Greenish gray clay shale with lenses of Chonetes
coquina -- 16 feet thick
Characteristic megafossils: Hederella sp.,
Arthoclama sp., Helopora inexpectata
McNair, Stictoporina granulifera Stewart, Stroph-
eodonta cf} demissa, Spirifer mucronatus,
Chonetes cf. fragilis Stewart, Cyrtina cf.
hamiltonensis, Orthoceras sp., Hemigystites
devonicus Bassler, Lepidodiscus alpenensis
Bassler, Lqphonychia cf. cordata Stewart.
1. Shale, gray, calcareous, fossiliferous; to bot-
tom of drainage ditch -— 3 feet thick

 

 

 

 

 

 

 

 

 

 

Total thickness of Ferron Point formation here is
19 feet.

According to Warthin and Cooper (1943) the basal
bed (bed 1) of the section at the locality 51 of the Geo-
logical Survey Of Michigan contains essentially the same
fossil assemblage as the top bed (bed 7) of the Rockport
quarry section. Though the two sections do not overlap
enough to give positive assurance of the identity of these
two beds, measurements on two sets of outcrops fail to in-
dicate any covered interval.

Throughout the eastern half of the Southern Peninsula

of Michigan and some parts of the western half, the shale
encountered at this approximate stratigraphic horizon in

oil wells is at least in part of Ferron Point formation age.
G. V. Cohee (1947) included in Ferron Point formation the
calcareous shale and shaly limestone beds that are encountered
in oil wells drilled in eastern, northern, and central parts
of the Southern Peninsula of Richigan and he states that the
Traverse rocks exposed along the Ten Mile Creek near Silica,
in Lucas County, Ohio, are believed to represent the same
time interval as the formations above the Rockport Quarry
limestone in the outcrop area in Alpena and Presque Isle
Counties of Michigan. Warthin, Jr., and COOper (1943) think
that the Silica Shale of northwestern Ohio may represent

the southern end of this shale mass.

A correlation of the Ferron Point formation outside
of Michigan is possible because of the work of Cooper and
Warthin, Jr. (1935, Pp. 376-377; 1941, pp. 259-260). These
authors believe that the Ferron Point formation is to be
correlated with the Skaneateles formation of the Hamilton
group Of New York.

The upper limit of the Ferron Point formation is
marked by the appearance of more calcareous shale containing
fossils of the Genshaw formation. Sedimentation was prob-

ably uninterrupted.

MATERIAL

All the samples were collected by Dr. Jane E. Smith
in October, 1956, from the outcrops at the localities shown
on the map (Figure 2). The total amount of washed sample
was about 3660 grams from all the localities ranging from
60 grams to over 2000 grams from each locality. About 60%
of the material was collected from locality l, 30% from
locality 4, 4% from each of localities 2 and 5 and 2% from
locality 3.

The beds of Ferron Point formation of the area con-
sist of very soft, light gray calcareous shale interbedded
with thin lenses of argillaceous limestone. Because of the
easily weathered character the Ferron Point beds are exposed
generally in artificial Openings, ditches or pits. It is
very easy to free the fossils from the rocks.

The materials for the present study were mainly
dry clay. To free the fossils the materials were soaked
in water for 3 to 4 hours which loosened most of the fos-
sils from clay and sand. Clay particles were removed by
pouring out the muddy water. This decantation process was
repeated several times until most of the clay particles
were removed. The fossils mixed with sand grains and a
few small fragments of limestone rocks enclosing fossils

were boiled in water containing sal-soda (Na2C03). This

10

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12

process broke the limestone fragments and freed the fossils
from them as well as cleaned the samples.

After drying the samples fossils were picked up
from the sand grains with a wet, pointed, fine brush and
mounted with tragacanth on the card board slides.

All the Specimens are deposited in the Paleontolog-
ical Museum, Department of Geology, Michigan State Univer-

sity, East Lansing, Richigan.

REGISTER OF LOCALITIES

The localities of fossil collection for the present

work are numbered independently without following the pre-

vious authors. For localities coincident to those of the

previous works references of numbers are made in descrip-

tions of the localities (Fig. 2).

Locality 1.

Locality 2.

Locality 3.

It is near locality 17 of Kelly and Smith (1947).
on Milligan Creek about 2% miles northwest of
Tower city and about 450 yards south of Detroit-
mackinac Railway bridge over hilligan Creek in
NWT, SW%, 83%, Sec. 29, T.35 N., R.l E., Che-
boygan County, Michigan.

This is locality 29 of the Geological Survey

of Michigan and locality 34 of kelly and Smith
(1947). Abandoned quarry of Onaway Limestone
Company on the south shore of Black Lake and
western end of the State Park at about center

of W% of NWT, Sec. 7, T.35 N., R.2 E., Presque
Isle County; about 200 yards east of the county
line between Cheboygan and Presque Isle.
Anticline on the western branch of the Rainy
River about 1000 yards down stream (towards
north) from the waterfalls on the river in

NEQ, Nfli, swf, Sec. 26, T.35 N., R.2 E.,

13

Locality 4.

Locality 5.

14

Presque Isle County and about 3 miles north—
east of Onaway, michigan.

Just below falls on western branch of the Rainy
River, about 120 yards south of the north sec-
tion line in NS of NWR, Sec. 35, T.35 N.,

R.2 3., Presque Isle County, and about 2%

miles east-north-east of Onaway and half a

mile directly south of locality 3.

0n the(kqueoc River about 0.8 mile south-south-
west of Ocqueoc falls and about 350 yards
southwest of the bridge at the center of the
section in W5 of N“&, Sec. 27, T.35 N., R.2 E.,

Presque Isle County, Hichigan.

SYSTEMATIC DESCRIPTIONS

Phylum ARTHROPODA
Class Crustacea
Order Ostracoda
Superfamily Leperditacea
Family Leperditellidae Ulrich and Bassler 1906

Genus Macronotella Ulrich 1894

 

Type snecies.--By original designation, Kacronotella

scofieldi Ulrich, 1894, pp. 683-84; P1. 43, Figs. 30-34.

 

hacronotella hfpercala Keeling and Kilgore

 

macrcnotella hypercala Keeling and Kilgore, 1952, p. 2;
Pl. I, Figs. 25’360

Occurrence.--Rare at locality 5.

 

Types.--Hypotype, one complete carapace, NO. 5u,
from locality 5.

Genus Dictyogramma Smith 1959

 

Type Species.--By original designation, Dictyogramma

 

scabratum Smith, 1959, PP. 25-26; Pl. 1, Figs. l-ll.
Dictngramma scabratum Smith
Dictyogramma scabratum Smith, 1959, pp. 25-26; Pl. 1, Figs.
l-ll.
Remarks.--0nly one right and one left valve are

available for study. 0n the left valve, No. 2e(i), there

15

16

is a distinct vertically elongate pit in the anterocentral
part. Right valve, No. 2e(ii), has its anterocen ral part
covered with some foreign materials and does not reveal
clearly whether or not there is a similar anterocentral
pit on it like that of the left valve. It is not possible
to be sure if this anterocentral pit is a characteristic
Of surface ornamentation of the species since only one right
valve was available for study. Except for this anterocen—
tral pit the specimens have all other characteristics of
Dictngramma scabratum Smith. This pit may be the result
of injury or distortion.

Occurrence.—-Common at locality 2.

Typg§.--Hypotypee, an adult left valve, NO. 2e(i),
and an adult right valve, No. 2e(ii), from locality 2.

Genus Schmidtella Ulrich 1892

Type epecies.--By original designation, Schmidtella

 

craeeimarginata Ulrich, 1892, p. 269; P1. 9, Figs. 27-30.
Schmidtella fabiformis Keeling and Kilgore
Schmidtella fabiformis Keeling and Kilgore, 1952, pp. 2-3;
P1. 11, Figs. 1-7.
Smith, 1959, pp. 28—29; Pl. IX, Figs. 15-17; Pl. X,

Figs. 2-6.

Occurrence.--Rare at locality 5.

Typp§.--Hypotype, one complete carapace, No. 5v,
from locality 5.

Superfamily Beyrichiacea

17

Family Rollinidae Swartz 1936
Genus Adelphobolbina Stover 1956
Typg sqecies.--Ctenobolbina papilloea Ulrich, 1891,
p. 186; P1. 15, Figs. 8g:g., by subsequent designation of
Stover, 1956, pp. 1103-04.

Adelphobolbina megalia (Keeling and Tabor)
Ctenobolbina megalia Keeling and Tabor, 1952, pp. 761-62;
Pl. 111, Figs. 15-19.

1953, PP. 87-88; Pl. III, Figs. 18-25.

Occurrence.--Rare at locality 4.

Typgp.-—Hypotypes, two female carapaces, Noe. 4u(i)
and 4u(ii), from locality 4.

Adelphobolbina papillata (Tolmachoff), emend.
Warthin, Jr.

Bollia papillata Tolmachoff, 1926, p. 29; F1. 2, Figs. 4-5.
Bollia protuberata Tolmachoff, 1926, p. 30; P1. 2, Fig. 6.
Ctenobolbina papillata Warthin, Jr., 1937, Card 67.

Remarks.--The valves of these specimens have a gran-
ular surface as well as papillae.

Occurrence.--Common at locality 5, rare at locality
4, shale member.

Typg§.——Hypotypes, one female right valve, broken
at anterodoreal corner, No. 4a, from locality 4; one incom-
plete male carapace, NO. 5b(i), and one female left valve,

NO. 5b(ii), from locality 5.

18

Adelphobolbina papilloea (Ulrich)
Ctenobolbina papillosa Ulrich 1891, p. 186; F1. 15, Figs.
8&42. Coryell and Malkin, 1936, p. 3, Fig. 8.
Occurrence.--Abundant at locality 5, shale member.
Typg§.—-Hypotype, one female carapace, NO. So, from
locality 5.
Genus Ctenoloculina Baesler 1941
Typg speciee.--By original designation of Bassler,
1941, pp. 22-23, Tetradella cicatricoea Warthin, Jr., 1934,
p. 209; P1. 1, Figs. 4-6.
Ctenoloculina eurybathrota Keeling
Ctenoloculina eurybathrota Keeling, 1952p, pp. 46—48; Pl.
I, Figs. 1-9.
Keeling and Tabor, 1953, p. 94; Pl. I, Figs. 1—2.
Occurrence.--Rare at locality 2.
Typ§§.--Hypotype, one eroded male carapace, No.
2a, from locality 2.
Genus Parabolbina Swartz 1936
Typg Species.--By original designation, Ctenobolbina
granosa Ulrich, 1900, p. 183; P1. 8, Fig. 12, by subsequent
designation of Swartz, 1936, p. 570.

Parabolbina oxypages Keeling and Tabor
Parabolbina oxypages Keeling and Tabor, 1953, p. 89; Pl.
III, Figs. 8-15.

Remarks.-—The hinge line in these specimens is not

straight as in the holotype. In lateral view the hinge

19

line is depressed ventrally probably due to distortion after
death because the specimens are broken.

0courrence.--Common at locality 2.

Typp§.--Hypotypes, an immature male carapace with
posterior end broken, No. 2d(i), and an adult male broken
carapace, No. 2d(ii), from locality 2.

Genus Hollinella Coryell 1928

Typg species.--By original designation, Hollinella
dentata Coryell, 1928, p. 378.

Hollinella cuspibulbata Keeling and Tabor
Hollinella cuspibulbata Keeling and Tabor, 1953, PP. 85—86;
P1. II, Figs. 1—4.

Occurrence.-—Common at locality 3.

Typ3§.-—Hypotype, one male right valve broken at
the posterior end, N0. 3a, from locality 3.

Hollinella_p1auta Keeling and Tabor

Hollinella plants Keeling and Tabor, 1953, pp. 86-87; Pl.
1, Figs. 18-22. Stover, 1956, p. 1102; F1. 111, Fig. 14.

Occurrence.--Rare at locality 4.

Typg§.--Hypotype, one right valve of an adult cara-
pace, No. 4b, from locality 4.

Hollinella pumila Keeling

Hollinella pumila Keeling, 19523, p. 48; P1. I, Figs. 16-23.

Occurrence.-—Abundant at locality 2, rare at local-
ity 4.

Typg§.-—Topotypes, an adult female right valve, No.

20

2b(i), a right valve of an instar, No. 2b(ii), a complete
carapace of an instar, No. 2b(iii), from locality 2. Hypo-
type, a female broken right valve, No. 4c, from locality 4.

Hollinella rana Weiss

 

Hollinella rana Weiss, 1954, PP. 59-60; P1. 20, Figs. 14-20.
Smith, 1959, P. 37; P1. IX, Figs. 28-38.

Occurrence.—-Rare at locality 4.

Typg§.--Hypotype, one complete adult carapace, NO.
4d, from locality 4.

Hollinella vegrandis Keeling and Tabor
Hollinella vegrandis Keeling and Tabor, 1953, pp. 84-85;
P1. I, Figs. 23-27.

Smith, 1959, pp. 36-37; Pl. IX, Figs. 39—41; Pl. K,
Fig. 1.

Occurrence.—-Abundant at locality 5, common at 10-
cality 3, rare at localities 2 and 4.

Typg§.——Hypotypes, an adult left valve, No. 3c,
from locality 3; two adult left valves, Nos. 4e(i), 4e(ii),
and two adult right valves, Nos. 4e(iii), 4e(iv), from 10-
cality 4; a complete carapace of an instar, NO. 5e(i), a
left valve, No. 5e(ii), and two adult right valves, Nos.
5e(iii), 5e(iv), from locality 5.

Family Drepanellidae Swartz 1936
Genus Bollia Jones and H011 1886

Typg species.--Bollia uniflexa Jones and Hell, 1886,

by subsequent designation of Killer, 1892, p. 706.

21

Bollia dieiuncta Keeling and Kilgore
Bollia disjuncta Keeling and Kilgore, 1952, p. 7; P1. II,
Figs. 8-13. Smith, 1959, pp. 40-41; P1. XI, Fig. 12.
Remarks.--Theee specimens are more finely punctate
on surface and ridges than the holotype and the puncta are
arranged in faint radiating rows.
Occurrence.--Rare at locality 5.
Typg§.--Hypotypes, one right and one left valve,
Nos. 5a(i) and 5a(ii) respectively, from locality 5.
Family Kloedenellidae Ulrich and Baseler 1923p
Genus Dizygopleura Ulrich and Baesler 1923p
Typg species.--By original designation, Dizygopleura
swartzi, Ulrich and Bassler, 1923p, p. 693; P1. 62, Figs.
1-8.

Dizygopleura euglyphea Warthin, Jr.

 

Dizygopleura euglyphea Warthin, Jr., 1934, p. 210; F1. 1,
Fig. 7; 1937, Card 57. stewart and Hendrix, 1945, P. 90;
P1. 10, Figs. 6-8. Keeling and Weiss, 1953, P. 54; P1. III,
Figs. 30-31. Smith, 1959, pp. 54-55; P1. XII, Figs. 7-26.

Occurrence.--Abundant at localities 2, 3, and 5,
rare at locality 4.

Typg§.--Hypotypes, one adult male carapace, No. 2f(i),
two adult female carapaces, Noe. 2f(ii), 2f(iii), and one
complete carapace of an instar, No. 2f(iv), from locality
2; one male carapace, NO. 3d(i), and one female carapace,

No. 3d(ii), from locality 3; one male and one female adult

22

carapace, Nos. 4f(i) and 4f(ii) respectively, from locality
4; an adult male carapace, No. 5f(i), a mature female cara-
pace, NO. 5f(ii), and two complete instars, Nos. 5f(iii),
5f(iv), from locality 5.
Dizygqpleura trisinuata Van Pelt

Dizygopleura trisinuata Van Pelt, 1933, p. 328; P1. 39,
Fig. 61. Stewart, 1950, p. 661; P1. 86, Figs. 4-6. Coley,
1954, PP. 455 and 457. Smith, 1959. P. 55; Pl. XIII, Figs.
1-5.
Dizygopleura oblonra Warthin, Jr., 1934, p. 211; P1. I,
Fig. 8. Stewart, 1936, p. 750; P1. 101, Figs. 1-4.

Occurrence.--Abundant at localities 2 and 3.

Typg§.--Hypotypes, two adult male carapaces, Nos.
2g(i) and 2g(ii), from locality 2; two adult female cara-
paces, Nos. 3e(i) and 3e(ii), from locality 3.

Genus Kloedenella Ulrich and Bassler 1908

Typg species.-—Kloedenia penneylvanica Jones, 1889,
p. 341; Figs. Sprg, 6 (not 7g¢p, 8, or 9), by subsequent
designation of Ulrich and Bassler, 1908, p. 304, Fig. 54;
pp. 318, 340; P1. 43, Figs. 1-3.

Kloedenella trisulca Smith

 

Kloedenella trisulca Smith, 1959, pp. 58-60; Pl. 111, Figs.

 

1’15.
0ccurrence.--Abundant at localities 2 and 3, rare
at locality 5.

Types.--Hypotypee, two mature female carapaces, Nos.

23

2e(i), 2c(ii), two mature male carapaces, Noe. 2c(iii),
2c(iv), and two complete instars, Nos. 2c(v), 2c(vi) from
locality 2; two complete instars, Noe. 3f(i), 3f(ii), two
mature female carapaces, Nos. 3f(iii), 3f(iv), and two adult
male carapaces, Nos. 3f(v), 3f(vi), from locality 3; one
adult female carapace, No. 5g, from locality 5.

Genus Eukloedenella Ulrich and Bassler 1923

Type species.--By original designation, Eukloedenella

 

umbilicata, Ulrich and Bassler, 1923p, p. 669; P1. 57, Figs.
8‘12 0
Eukloedenella sp.

 

Description.-—Carapace subquadrate in lateral view,
elliptical in dorsal view. Slightly larger right valve
overlapping smaller left valve; overlap conspicuous only
at anterodorsal border. Dorsal border gently convex, ven-
tral border slightly curved in anterior half, straight in
posterior half; anterior border semicircular, posterior
border broadly rounded. Hinge line straight and hidden
in anterior by overlap of triangular extension of right
valve. Lateral surface convex, widest posteriorly. Small,
narrow, straight eulcus on both valves, extending from just
below the dorsal border to approximately two-fifths distance
to the ventral border. Anterior border of both valves with
slender marginal ridge. Surface smooth. Anterior cardinal
angle about 150°, posterior cardinal angle about 100°.

Dimensions.-—Greatest length in dorsal quarter of

24

the carapace; greatest height slightly anterior to eulcus;
greatest width in posterior one-third of the carapace.

Heasurements.--Length, 1.02 mm.; height, 0.58 mm.;
width, 0.43 mm.

Remarke.--These specimens show most of the charac-
teristics similar to Eukloedenella sp. described and illus-
trated by Stover (1956, p. 1110; P1. 114, Figs. 21-22).
Specimens of this collection differ from Stover's species
in having the eulcus straight rather than arcuate and the
eulcus is slightly longer than that of Stover's species.
From Eukloedenella dovereneie Turner, 1939, these specimens
differ in having a narrower marginal ridge and a less pro-
nounced posterior widening.

0ccurrence.--Common at locality 2.

 

Specimene.--0ne male carapace, NO. 2h(i), and a

 

female carapace, No. 2h(ii), from locality 2.

Family Primitiidae Ulrich and Bassler 1923p
Subfamily Primitinae Bassler and Kellet, 1934, p. 16
Genus Primitia Jones and Roll 1865

Typg species.--By original designation, Primitia
strangulata (McCoy)=Beyrichia strangulata McCoy, 1851; desig-
nated by Miller, 1889, p. 561. Jones and Roll, 1865, p. 451.

Primitia(?) seriata Stewart
Primitia(?) eeriata Stewart, 1936, p. 743; P1. 100, Figs.
6-7.

Remarks.--0nly one valve was available for study.

25

Generic and specific characteristics are not very distinct.
Occurrence.--Rare at locality 2.
Typpp,--Hypotypes, one adult right valve, NO. 2j,
from locality 2.
Family Cytherellidae Sars 1865
Genus Bythocyproidea Stewart and Hendrix 1945

Type species.--By original designation, Bythocyproidea

 

sanduskeyensis Stewart and Hendrix, 1945, PP. 91-92; P1.
10, Figs. 26-28.

Bythocyproidea eriensis Stewart and Hendrix
Bythocyproidea eriensis Stewart and Hendrix, 1945, pp. 92-
93; P1. 10, Figs. 23-25. (of) Bythocyproidea eriensis Stover,
1956, p. 1115; P1. 114, Figs. 9-10. Smith, 1959, PP. 75-76;
Pl. XV, Figs. 5-16.

Remarks.--Only one carapace was available for study.
This specimen has closer affinity with those described by
Smith, 1959, in having less arcuate dorsal border and a
weak posterior ridge on right valve.

Occurrence.--Rare at locality 4.

Typgp.--Hypotype, one complete adult carapace, No.
4t, from locality 4.

Genus Birdsallella Coryell and Booth 1933

Type species.--By original designation, Birdeallella

 

simplex Coryell and Booth, 1933, p. 271; P1. 5, Figs. 6-7.
Birdsallella tumida Stewart

Birdsallella tumida Stewart, 1936, p. 763; P1. 102, Figs.

27-28. Keeling and Weiss, 1953, p. 65; F1. V, Figs. 5-6.
Shiitrl, 1959, p. 78; Pl. XV, Figs. 25-31.

Occurrence.--Rare at locality 4.

 

Typee.--Hypotypes, two complete adult carapaces,
Nos. 4g(i) and 4g(ii), from locality 4.

Genus Ponderodictya Coryell and halkin 1936

 

Type species.--Cytherella? bigpinulatus Stewart,

 

 

 

1927, p. 60; Pl. 5, Figs. 18-19; by subsequent designation
of Coryell and malkin, 1936, p. 15; Figs. 28, 28g, 29-30;

the species bispinulatus was subsequently considered by

 

its original author, Stewart, 1936, pp. 756—57, to be a

synonym of Leperditia ppnctulifera Hall, 1860, p. 92.

 

Ponderodictya punctulifera (Hall)
Leperditia ppnctulifera Hall, 1860, p. 92.
Primitiopeis ppnctulifera Jones, 1890g, p. 9; Fl. 2, Figs.
7, 12-13. Grabau, 1899, p. 304, Figs. 243. Grabau
and Shimer, 1910, p. 345; Figs. 1603-5.

Cytherella? bispinulatus Stewart, 1927, p. 60; Pl. 5, Figs.

 

18—19.

Frimitiopsis unicornis Van Pelt, 1933, p. 326; P1. 39, Figs.

 

23-28.

Cytherellina punctulifera Warthin, Jr., 1934, p. 222; F1.

 

1, Figs. 24—25. hoore, Lalicker, and Fischer, 1952,
p. 530; Fig. 14.

Ponderodictyg bispinulata Coryell and Malkin, 1936, p. 16;

 

Figs. 2a, 28a, 29, 30. Shimer and Shrock, 1944, p. 687;

27

J

5-58. Wright, 1948, p. 120; P1. 15,

\II

F1. 28', Figs.

0

Figs. 35-38. Smith, R. L., 1956, Table I.

Ponderodictya unicornis Coryell and Ealkin, 1936, p. 16;

 

Figs. 31, 31g. Stewart and Hendrix, 1945, P. 94; P1.
10, Figs. 30-31. Wright, 1948; P1. 15, Figs. 39-40.

Hamiltonella pgnctulifera Stewart, 1936, p. 756; P1. 102,
Figs. 1-5.

Ponderodictya punctulifera Turner, 1939, p. 23; Fl. 1, Fig.

 

7. Keeling and Weiss, 1953, p. 66; P1. V, Figs. 21-29.
Coley, 1954, p. 455; Fig. 2. Stover, 1956, p. 1117;
P1. 114, Fig. 20. Smith, J. E., 1959, pp. 79-80; Pl.
XVI, Figs. 1-8.
Remarks.--These ostracods are abundant at locality
2 only and were not collected from any other outcrop of the
Ferron Point formation of the present work. Concerning
this common middle Devonian genus Keeling and Weiss stated
(1953, p. 66), "The limits of species of this genus have
been extremely difficult to define." Referring to some of
the difficulties Van Pelt (1933, p. 327) said, "It seems
doubtful, if the variation in numbers and location of the
tubercles is consistent in a single species. The variation
in shape, length of hinge line, and manner of hingement seem
inconsistent within a single genus." Turner (1939, pp. 23-
24) referred to "three more or less distinct types."
Correlation has not yet been established between

the number, size, and position of epines, ridges, and nodes

28

and the surface texture and shape of the valves. Kany com-
binations are present.

Keeling and Weiss (1953, p. 66) remarked about Mich-
igan specimens that, "Possibly, the Richigan specimens belong
to several species of very similar form, all of which lived
together in the same geographic province over a long period."
Stover (1956, p. 1117) commented that, "This large oetracode
is common in the less calcareous shales and is generally

associated with Quasillites and Euglyphella numismodes."

 

Cccurrence.--Abundant at locality 2.
Typg§.--Hypotypes, two complete adult carapaces,
Nos. 2e(i), and 2e(ii), from locality 2.
Genus Punctomosea Stover 1956

Type species.--By original designation, Thrallella

 

crietata Swartz and Oriel, 1948, pp. 561-62; F1. 79, Figs.
22, 23; by subsequent designation of Stover, 1956, pp. 1113-
14; Pl. 113, Figs. 26-29.
Punctomosea crietata (Swartz and Oriel)
Thrallella crietata Swartz and Oriel, 1948, pp. 561-62; P1.
79, Figs. 22, 23.
Henoedinia crietata Coley, 1954, pp. 461-62.
Punctomosea crietata Stover, 1956, p. 1114; P1. 113, Figs.
26-29.
Occurrence.—-Rare at locality 5.
Typ§§,--Hypotype, one complete adult carapace, NO.

5k, from locality 5.

29

Genus Cavellina Coryell 1928

 

Tvne speciee.--Cavellina pulchella Coryell, 928,

Cavellina cuneata Coryell and Ialkin
avellina cuneata Coryell and Halkin, 1936, p. 14; Fig. 25.
Occurrence.--Rere at locality 4. ‘
Tynes.--Hypotype, a crushed adult carapace, No. 4w,
from locality 4.
Family Thlipsuridae Ulrich 1894

Genus Octonaria Jones 188

 

. . . . . 8 .
Type eleclee.--By original deSIgnatlon, Cctonarla

 

octoformis Jones, 1887, p. 404; P1. 12, Figs. 2a-p.

Octonaria aevilatata Keeling and Kilgore

 

Octonaria laevilatata Keeling and Kilgore, 1952, pp. 9-10;
Pl. III, Figs. 1-26, 29.
Occurrence.—-Abundant at locality 5.
Typg§.--Hypotypes, two complete carapaces, Nos.
5e(i), 5e(ii), from locality 5.
Octonaria guadricostata Van Pelt
Octonaria qpadricostata Van Pelt, 1933, p. 336; P1. 30,
Figs. 41-51. Warthln, Jr., 1934, p. 217; P1. I, Figs.
16-17. Stewart, 1936, p. 752; P1. 101, Figs. 7-9.
Keeling and Weiss, 1953, p. 59; Pl. IV, Figs. 1-4.
Smith, 1959, p. 83; Pl. XVII, Figs. 16-30.
Strepulites quadricostata Coryell and halkin, 1936, p. 5.
Warthin, Jr., 1945, Card 41, Figs. 41-51. Coley, 1954,
p. 455, Fig. 2.

3O

Occurrence.—-Abundant at localities 2 and 5, common

 

at locality 3, rare at localities l and 4.

gypg§.--Hypotypes, two complete carapaces, Noe.
1e(i), le(ii), from locality 1; two complete carapaces,
Nos. 22(1), 22(ii), from locality 2; two complete carapaces,
Noe. 3b(i), 3b(ii), from locality 3; two carapaces, Noe.
4e(i), 4e(ii), from locality 4; two carapaces, Noe. 5t(i),
5t(ii), from locality 5.

Octonaria crescentiformie Van Pelt

Octonaria crescentiformie Van Pelt, 1933, pp. 334-35; Pl.

 

39, Figs. 55—60. Warthin, Jr., 1934, p. 218; P1. 1,
Fig. 18. Stewart and Hendrix, 1945, P. 91; P1. 10,
Figs. 15-17. Keeling and Kilgore, 1952, p. 9; P1. 13,
Figs. 27—28. Keeling and Weiss, 1953, p. 60; P1. IV,
Figs. 5-7. Smith, 1959, p. 83; Pl. XVII, Figs. 31—34.
Strepulitee creecentiformie Coryell and Halkin, 1936, p. 5.
Warthin, 1945, Card 35, Figs. 55-60.
Occurrence.--Abundant at locality 2, common at lo-
calities 3 and 5, rare at locality 4.
gypg§.--dypotypee, two complete carapaces, Hoe.
2y(i), 2y(ii), from locality 2; one complete carapace, No.
3k, from locality 3; two complete carapaces, Foe. 4r(i),
4r(ii), from locality 4; two complete carapaces, Nos. 5r(i),
5r(ii), from locality 5.

Genus Hyphasmaphora Van Pelt 1933

 

Eype speciee.—-By original designation, Hyphaemaphora

 

 

31

textiligera Van Pelt, 1933, P. 340; P1. 39, Figs. 3-7.
Hyphasmaphora textiligera Van Pelt
Hyphaemaphora textiligera Van Pelt, 1933, p. 340; P1. 39,
Figs. 3-7. Warthin, Jr., 1934, p. 219; Pl. 1, Figs.
20; 1945, Card 80, Figs. 3-7. Wright, 1948, p. 96;
P1. 11, Fig. 46. floors, Lalicker, and Fischer, 1952,
p. 531, Fig. 5. Keeling and Weiss, 1953, p. 60; P1.
IV, Figs. 34-36. Jones, 1956, p. 165, Figs. 8-11.
Smith, 1959, p. 84; Pl. XVIII, Figs. 1-2.
Occurrence.--Rare at localities 2 and 5.
gypg§.--One complete carapace, Ho. 5g, from local-
ity 5.
Superfamily Cypridacea
Family Bairdiidae Sars 1887
Genus Bairdia flcCoy 1844
gypg epeciee.-—By original designation, Bairdia
gggpa McCoy, 1844, p. 164; P1. 23, Fig. 6.
Bairdia amplectene Keeling and Kilgore
Bairdia amplectene Keeling and Kilgore, 1952, pp. 12-13;
Pl. IV, Figs. 1-3.
Occurrence.--Common at localities 2 and 5, rare
at locality 4.
gypg§.—-Hypotypes, three adult broken carapaces,
Noe. 2k(i), 2k(ii), 2k(iii), from locality 2; two adult
complete carapaces, Noe. 4h(i), 4h(ii), from locality 4;
two adult complete carapaces, Roe. 5b(i), 5h(ii), from lo-

cality 5.

32

Bairdia emaciata Keeling and Kilgore

 

Bairdia emaciata Keeling and Kilgore, 1952, p. 13; Pl. IV,

Occurrence.—-Abundant at locality 5, common at lo-

 

cality 2, rare at localities l and 4.

Typg§.--Hypotypee, two adult complete carapaces,
Nos. la(i), la(ii), from locality 1; two complete mature
carapaces, Nos. 2t(i), 2t(ii), from locality 2; one complete
carapace, No. g, from locality 4; and two complete adult
carapaces, Nos. 5d(i), 5d(ii), from locality 5.

Bairdia summacuminata Coryell and Malkin
Bairdia summacuminata Coryell and Halkin, 1936, p. 9; Fig.
23. Stover, 1956, p. 1119; P1. 115, Figs. 10-11. Smith,
1959. PP. 85-86; Pl. XVI, Figs. 9-15.

Remarks.--These specimens differ in some character-
istics from those of the holotype from the Arkona shale.
The amount of overlap along the dorsal border in the aver-
age specimen is considerably less than is illustrated by
Coryell and fialkin (1936, p. 12, Fig. 23); the adult cara-
pacee in this collection, in ventral view, show an almost
elliptical depression midway along the ventral border.

This depression on some Specimens is rimmed laterally by
faint ridges seen in lateral view.

The Ferron Point specimens are more similar to the
hypotypee (Stover, 1956, p. 1119, P1. 115, Figs. 10-11)

from the Windom Shale (Hamilton) than the holotype.

0ccurrence.--Abundant at locality 5, rare at local—

 

ity 4.

Typg§.--Hypotypee, two adult broken carapaces, Nos.
4j(i), 4j(ii), from locality 4; two adult carapaces, Hoe.
53(i), 5j(ii), from locality 5.

Genus Bythocypris Brady 1880

”ype eeecies.--By original designation, Bythocypris

 

reniformis Brady, 1880, p. 46; Pl. 5, Figs. 1g, 1.

Pythocypris transutyxis Stover

 

 

EjtJOCXprlS traneptyxis Stover, 1956, p. 1120; P1. 115,
Figs. 15-16. Smith, 1959, pp. 90—91; Pl. XVII, Figs.
3-7; P1. XVIII, Figs. 5-8.

Occurrence.--Abundant at locality 2, rare at local-
ity 1.

Typg§.--Hypotypes, two adult broken carapaces, Foe.
lb(i) and lb(ii), from locality 1; two complete mature cara—
paces, Kos. 2n(i), 2h(ii), and two inmature instars, Foe.
2n(iii), 2n(iv), from locality 2.

Pythocypris devonica Ulrich

 

Fythocypris devonica Ulrich, 1891, p. 196; P1. 17, Fig. 1.
Wilson, 1935, p. 644. Smith, 1959, p. 90; Pl. XVII,
Figs. 1, 2.

Occurrence.--Common at locality 5.

 

Types.--Hypotype, one complete adult carapace, No.
51, from locality 5.

pythcypris augustai Pribyl and Snajdr

 

34

Pythocypris augustai Pribyl and Snajdr, 1950, p. 158 (Eng-
lish); P1. 3, Figs. 10-11; Pl. 4, Figs. 6—9.

Remarks.-—These specimens show the characteristics
that are common to both p. augustai Pribyl and Snajdr and
p. parsonia Wilson (1935, pp. 645-46; P1. 78, Figs. 93:9).
The only difference between these two Species is the size.
p. pareonia is larger and narrower than 3. augustai and on
the basis of the size and length-height ratio it seems that
the specimens of this collection should be p. augustai.

Measurements g; hypotype.-—Length, 1.2 mm.; height,

 

0.6 mm.; width, 0.4 mm.

Occurrence.--Abundant at locality 2.

Typg§.--Hypotypes, two complete mature carapaces,
Nos. 2m(i) and 2m(ii), from locality 2.

Bythocypris geisi Wilson

Bythocypris ggiei Wilson, 1935, p. 645; P1. 78, Figs. 7273.

Occurrence.--Rare at locality 4.

Typg§.--Hypotypee, two complete adult carapaces,
Hoe. 4v(i) and 4v(ii), from locality 4.

Genus Tubulibairdia Swartz 1936

Type species.--By original designation, Tubulibairdig

 

tubulifera Swartz, 1936, p. 581; P1. 89, Figs. 237;.
Tubulibairdia windomensis Swartz and Oriel
Tubulibairdia windomeneis Swartz and Oriel, 1948, p. 563;
P1. 81, Figs. 10-14. Smith, 1959, p. 95; Pl. XVII,

35

Occurrence.--Oommon at locality 3.

 

Typ§§,--dypotype, one complete adult carapace, No.
3g, from locality 3.
Family Quasillitidae Coryell and Halkin 1936
Genus Opaeillites Coryell and malkin 1936

 

Type species.--By original designation, Quaeillites

 

obliguus Coryell and malkin, 1936, p. 18; Figs. 36, 36g.
Quaeillites binodueus Swartz and Oriel
Quasillites binodusus Swartz and Oriel, 1948, pp. 559-60;
P1. 79, Figs. 18-21. Keeling and Weiss, 1953, p. 62;
Pl. IV, Figs. 27, 29-30.

Description 9: interior 9; the right valve.—-The

 

interior of the right valve of this Specimen shows a few
distinct features. There is a groove along the margins all
around the valve. This groove is less conspicuous along

the dorsal border. The groove has its inner edge extended
outward to fit inside of the left valve. From near the
dorsal border there is a ridge-like structure running across
the valve dividing it in anterior and posterior halves.

The ridge extends to the point where there is a smooth spot
on the exterior surface of the valve. This ridge-like struc-
ture has developed two almost hemispherical bowl-shape de-
pressions in the two halves of the valve.

Occurrence.--Rare at locality 4.

 

Tynes.--Hypotypes, two adult right valves, Nos.
4p(i), 4p(ii), from locality 4.

36

Quasillites ohliqpue Coryell and Halkin

 

ggasillites obliguue Coryell and flalkin, 1936, p. 18, Figs.
36, 36g. Turner, 1939, pp. 25-26; P1. I, Figs. 15, 18.
Keeling and Weiss, 1953, p. 62; P1. IV, Figs. 50-51.
Keeling, Kavary, Takagi, Tillman, and Wulf, 1959, p.
22, Pl. II, Figs, 1-24; P1. IV, Figs. 28-34.

Occurrence.--Abundant at localities 2 and 3.

 

gypg§.--Hypotypes, two adult carapaces, Noe. 2v(i)
and 2v(ii) from locality 2; two adult carapaces, Nos. 3m(i)
and 3m(ii), from locality 3.
ansillites ornatus Swartz and Oriel
guaeillites ornatus Swartz and Oriel, 1948, pp. 558-59; P1.
80, Figs. 11-17. Keeling and Weiss, 1953, p. 60; Pl.
IV, Figs. 22-24, 31. Smith, 1959: PP. 103-107; Pl.
VIII, Figs. 1-9; P1. XIX, Figs. 13-25.
Occurrence.--Abundant at localities 2, 3, and 4.
Typg§.--Hypotypes, two adult carapaces, Nos. 2w(i),
2w(ii), from locality 2; two complete carapaces, Nos. 3j(i),
3j(ii), from locality 3; and two mature complete carapaces,
Nos. 4q(i), 4q(ii), from locality 4.
Genus Bufina Coryell and Malkin 1936
2122 species.--By original designation, Bufina elata
Coryell and Malkin, 1936, p. 8; Fig. 22.
Bufina coloba Smith
Bufina coloba Smith, 1959, pp. 107—109; Pl. VII, Figs. 1-10.

Occurrence.-—Rare at locality 4, top bed.

37

Types.--fiypotypee, one complete adult carapace,

No. 4k(i), one left valve, No. 4k(ii), and two right valves,
Nos. 4k(iii) and 4k(iv), from locality 4.
Genus Euglyphella Warthin, Jr., 1934

Type species.--By original designation, Strepula

 

sigmoidalis Jones, 1890a, p. 11; Pl. 2, Fig. 4; by subsequent
designation of Narthin, Jr., 1934, P. 220; P1. 1, Fig. 21.
Euglyphella sigmoidalie (Jones)

Strepula sigmoidalis Jones, 1890g, p. 11; Pl. 2, Fig. 4.
Grabau, 1899, p. 305, Fig. 245.

Strepula plantaris Jones, 18903, p. 540; P1. 20, Figs. Baep.
Grabau, 1899, pp. 305-06, Fig. 246.

Euglyphella sigmoidalis Warthin, Jr., 1934, p. 220; Pl. 1,
Fig. 21. Bassler and Kellet, 1934, PF. 37, 311; Fig.
16. Coryell and Kalkin, 1936, p. 7; Fig. 17. Shimer
and Shrock, 1944, p. 81; P1. 286, Fig. 7. Warthin, Jr.,
1945, Card 78, Fig. B. Wright, 1948, p. 101; Fl. 12,
Figs. 36-37. Keeling and Kilgore, 1952, p. 10; P1. III,
Figs. 30—36. Coley, 1954, P. 455, Fig. 2. Smith, M. L.,
1956, Table I. Jones, D. J., 1956, p. 165, Figs. 8-11.
Smith, J. 3., 1959, p. 113; P1. XVIII, Figs. 31, 32;
Pl. XIX, Figs. 1-12.

Cccurrence.--Abundant at localities 2, 3, and 5,
rare at locality 1.
Typ§§,-—Hypotypes, two adult carapaces, Noe. 1d(i)

and 1d(ii), from locality 1; two complete mature carapaces,

38

Nos. 2u(i), and 2u(ii), from locality 2; two adult carapaces,
Nos. 3h(i), 3h(ii), from locality 3; and two adult carapaces,
Nos. 5n(i), 5n(ii), from locality 5.
Genus Ropolonellus Van Pelt 1933
Typg speciee.-—By original designation, Ropolonellus
papillatus Van Pelt, 1933, p. 330; Figs. 29-30.
Ropolonellus plenus Keeling and Weiss
Ropolonellus plenus Keeling and Weiss, 1953, p. 64; Pl. IV,
Fig. 39, Smith, 1959, p. 117; P1. XIX, Figs. 26-27.
Occurrence.--Abundant at localities 2 and 5.
Typg§.--dypotypes, two complete carapaces, Nos.
2x(i), 2x(ii), from locality 2 and two complete carapaces,
Nos. 5p(i), 5p(ii), from locality 5.

Triambon n. genus

 

Deecription.--Carapace of moderate size; subtriangu—
lar to subovate in lateral view. Dorsal border arcuate,
ventral border straight or slightly concave at the midcenter.
Left valve larger than the right, overlapping the latter
on all borders; overlap greater and more conspicuous along
dorsal and ventral borders. Prominent, sharp-crested, poe-
teriorly convex ridge present at the posterior end of each
valve; a crescent shape anterodorsally convex ridge, less
prominent than the posterior ones, present in the antero-
dorsal quarter of the right valve. Valve surface granular
to very finely punctate.

Remargg/Relationship_.--Genus Triambon differs from

 

39

Parabufina Smith, 1956, in lacking the anterior ridge on

the left valve. In Triaubon there is a crescentic ridge

 

in the anterodorsal quarter of the right valve and there
is no ridge of any kind in the anterior part of the left

valve; whereas in Parabufina there are prominent anterior

 

and posterior ridges on both valves. Parabufina ridges flare

 

out from the valves but in Triembon osterior ridges ro'ect
’2)

 

backward and do not flare out from the valves. In dorsal

view Triambon is wedge shape, and Parabufina is about panduri-

 

 

forlflo

Genus Trianbon differs from Punctonosea Stover, 1956,

 

 

in having the anterior crescentic ridge on the right valve
and in lacking coarse reticulation on valve surface. Punc—
tomosea has posterior ridges but does not have anterior

ridge on either of the valves. In Punctomosea reticulation

 

is restricted to the lateral surfaces of the valves anterior

to the posterior ridge. In genus Triambon the whole surface

 

of the valves is either granular or very finely punctate.
Genus Triambon differs from Bythocyproidea of Stewart

and Hendrix, 1945, in the respect that Triambon has its

 

posterior ridges equally developed on both valves and has

an anterior ridge on the right valve; whereas Bythocyproidea

 

has left posterior ridge less deveIOped than the right pos-
terior ridge and it does not have anterior ridge on either
of the valves. Triambon has the valve surface very finely

punctate or granular, but Bythocyproidea is coarsely punctate.

4o

Tr

5t.)

noon differs from Healdia Ron undy, 1929, in having
the anterior crescentic ridge on right valve which is lacking
in Healdia. Ioreover, the ridge-like structures that Healdia
has on the posterior swollen area of the valves are either
elevated ridges or semicircular sinus or backward pointing
spines; whereas in case of Triambon they are backward point-
ing, posteriorly convex, sharp-crested distinct ridges.
Furthermore, the dorsal margin of Healdia is somewhat angular
at the middle and in most species the posterodorsal corner

is truncated. Dorsal margin of Trianbon is not angular in
any of the Specimens studied and no specimen was found with
posterodorsal corner truncated.

Tr ”“8 bon differs from Bird 1 ella Coryell and Booth,

 

1955, in having anterior crescentic ridge on right valve.

Some species of Birdsallella have a slight marginal flatten—

 

ing of the posterior end which gives rise to ri —1ike
structure; but it is not sharp-crested rid: e as in Triarhon.

Moreover, in Dir dsa llella right valve is lar er and overlap

 

the left. Birdsallella has its surface smooth and Triambon

 

has granular or very finely punctate surface.

Triambon argutum n. Sp.

 

P10 1, Fi'So 5-9
Des cri1tion.--Carapace subtriang ula r in lateral
view. Dorsal border arcuate; midventral border straight.

Valves evenly convex. In lateral view posterior part of

41

the dorsal border steeper than the anterior part. Posterior
end broadly rounded, anterior end narrowly rounded. Left
valve larger than the right, overlapping the latter on all
borders, stronger overlap on the dorsal and ventral borders.
Right valve reniform in lateral view. A prominent sharp
crested ridge at the posterior end of each valve; ridges
occupying the central half of the posterior end, curving
posteriorly paralleling the posterior borders. A crescent
shape ridge, less prominent than the posterior ridges, in
the anterodorsal quarter of right valve. Anterior ridge
convex anterodorsally. Hinge line straight. Hingement
consisting of a groove along interior of anterior and pos-
terior contact margins, accommodating a ridge in correspond-
ing positions on left valve. Surface very finely punctate.
Measurements.--Greatest length a little ventral
from midpoint between dorsal and ventral borders; greatest
height in the posterior two-thirds of the carapace; greatest
width through posterior ridges.

Dimensions of holotype, a complete carapace.--Length,

 

0.92 mm.; height, 0.60 mm.; width, 0.42 mm.; length-height
ratio, 1.53.

Occurrence.--Abundant at localities 2 and 5, rare
at localities 1 and 4.

2ypg§.--Holotype, a complete adult carapace, No.
52, from locality 5; paratypes, one eroded adult carapace,

No. 10, from locality 1; one complete adult carapace, No.

42

2dd, from locality 2; one complete mature carapace, Ho. 4x(i),

1d a complete carapace of an instar, ho. 4x(ii), from 10—
cality 4; one adult left valve, No. 5x(i), one adult right
valve, Ho. 5x(ii), a complete adult carapace, Lo. 5x(iii),
from locality 5.

Triambon acrojubatum n. sp.

 

Pl. 1, Figs. 4, 10, ll, 12

Description.--Carapace subtriangular to elongate
in lateral view. Dorsal border arcuate, ventral border
straight or slightly concave. Left valve larger than the
right and overlapping it on all sides; overlap greater along
the dorsal and ventral borders. terior end narrowly rounded,
posterior end broadly rounded. A sharp crested prominent
posterior ridge convex posteriorly on each valve; a crescent
shape prominent ridge in the anterodorsal quarter of right
valve. Posterior ridges projecting outward from lateral
surface and posteriorly, resembling wings extending poster-
iorly parallel to the posterior border, in dorsal and ventral
views. Posterior lepe of ridge concave and recessed beneath
the lip of the ridge in the outer half, convex in the inner
half. Left posterior ridge slightly longer than the right
posterior ridge, and projecting farther out from the vertical
plane between the valves than the right posterior ridge.

Keasurements.--Greatest length slightly ventral from
the midpoint between dorsal border and ventral border; great—

est height slightly posterior frcm the midpoint between

43

anterior and posteri

O
H
(D
Li
(L
m

greatest width through posterior
ridges.

D‘mensions _f holotype, a complete carapace.--Length,

 

 

0.94 mm.; height, 0.55 mm.; width, 0.50 mm.; length—height
ratio, 1.70.

Remarks.--Triambon acroiubatum differs from Triambon

 

 

 

argutum in having all the ridges more prominent. The pos—

terior ridges in Triambon acrojubatum are much more sharply

 

crested and more extended outward and backward than those

in Triembon ergutum. Triambon acroiubatum is more elongate

 

than Triambon argutum. In some specimens of Triambon acro—

 

jubatum the difference in length of posterior ridges is very
distinct.

Occurrence.—-Abundant at locality 5, common at 10-
cality 2, rare at localities l and 4.

gypg§.--Holotype, a complete adult carapace, No. 200,
from locality 2; paratypes, two eroded carapaces, hos. lf(i),
1f(ii), from locality 1; a complete carapace of an instar,
No. 2ee(i), a complete adult carapace, Ho. 2ee(ii), from
locality 2; an adult carapace, No. 4y, from locality 4; a
mature complete carapace, No. 5y(i), and a right valve,
No. 5y(ii), from locality 5.

Family Barychilinidae Ulrich 1891

Genus Barychilina Ulrich 1891

 

Type species.--By original designation, Berychilina

 

punctostriata Ulrich, 1891, p. 199; P1. 15, Figs. la-g,

Za-Eo

44

Baryphilina enbrithee Keeling and Kilgore

Barychilina embrithee Keeling and Kilgore, 1952, p. 12;

 

Pl. II, Figs. 56-44. feeling and Wise, 1955, p. 64;
P1. IV, Fig. 52. Smith, 1959, pp. 118—119; P1. XIX,
Figs. 50-34; Pl. XX, Figs. 1-4.

Remarks.--Variations in surface ornamentation are
remarkable, especially the variation in number of parallel
ridges which ranges from 9 to 14 in the specimens of this
collection.

Barychilina punctostriata Ulrich

 

 

Barychilina punctostriata Ulrich, 1891, p. 199; P1. 15,
Figs. lg—g, 2a_-_<_:_.
Occurrence.——Abundant at locality 5.
Types.—-Hypotype, one complete carapace, No. 5m,
from locality 5.
Barychilina tryphera Keeling and Kilgore
Barychilina tryphera Keeling and Kilgore, 1952, p. 11; Pl.
II, Figs. 27-30.

Occurrence.--Rare at locality 2.

 

Typee.--Hypotype, a complete carapace of an immature
instar, Ho. 2r, from locality 2.
Barychilina ep.
Description.--Carapace eubovoidal and elongate in
lateral view. Hinge line straight to very slightly curved
dorsally. Right valve larger, overlapping the left on all

sides except posterior half of the dorsal border. Deep,

well—defined, elongate pit in dorsocentral part of both
valves. Surface of both valves ornamented with fine inos-
culating ridges except in marginal areas. Space between
the ridges are punctate.

Dimensions.--Greatest length central, greatest height
and greatest width through the posterior half of the cara—
pace.

heesurenents.--Length, 1.10 mm.; height, 0.60 mm.;
width, 0.54 mm.

Remarks.--Tnis specimen is similar to Barychilina

 

labgrinthea Keeling and Kilgore (1952, pp. ll-l2; Pl. II,
Figs. 31~55) in most of the characteristics except in shape
and size. This Specinen is more ovoidal than rhonboidal

and elongate. It is larger and longer than Barychilina

 

labyrinthea.

 

Occurrence.--Rare at localities 2 and 4.
Specimene.--Two complete adult carapaces, Foe. 4n(i),
4n(ii), from locality 4; one crushed carapace, No. 2q, from
locality 2.
Superfamily Entomidacea
Family Entomidae Jones 1873
Genus Entomis Jones 1861
2133 species.-—By original designation, Entomis
tuberoea Jones, 186l, p. 137; Pl. 2, Figs. 5, 5a.
Entomis rhomboidea Jones

J

Entomis rhonboidea Jones, 1890g, p. 10; Pl. 2, Figs. O-lO.

46

Grabau, 1899, pp. 504- 05, Fig. 244.
Cccurrence.--Rare at local ty 2.
.2123§.--11potgpe, one complete adult carapace, Ho.

2gg, from locality 2.

Family incertae cedis
Genus Kirlc11ella Coryell and Booth 19 55
2122 speciee.--By original designation, Tirkgyella
.EZEE Coryell and Booth, 1955, p. 262.
Kirkb1e11a bellipuncta (Van Pelt)

A.o.1e ites bellipunctus Van Pelt, 1955, p. 552; F1. 59,
Figs. 37-40.

Hollinella belli1uncta Narthin, Jr., 1954, p. 208; P1. I,
Fig. 2. Stewart, 1956, p. 746; F1. 100, Figs. 15-1
Turner, 959, p. 12; P1. I, Fig. 5. Keeling, 19522,
p. 26; P1. I, Figs. 16-25.

Kirzb1e11a belli1uncta Harthin, Jr., 1937, Card 80. Shiner
and Shrock, 1944, p. 671; P1. 282, Figs. 45—44. Smith,
1959, p. 120; P1. XX, Figs. 8—12.

Occurrence.—-Abundant at locality 5.
2123§.--Hypotypee, two adult left valves, Foe. 5X(i),
5X(ii), and two adult right valves, Foe. 5x(iii), 5x(iv),

from locality 5.

Genus Amphisella Stover 1956

 

Tvoe sgecies.—-By origir al designation, xgphisella

 

pagillosa StOVGT. 1956, pp. 113 4- 35; Pl. 119 ,Figs. 11-12.

Aaphisella tenuis (Warthin)

47

Agphisella tennis Harthin, 1954, pp. 215—16; P1. I, Fig.

 

l5. Stover, 1956, p. 1154. Smith, 1959, pp. 122-25;

Occurrence.-—Conmon at localities 2 and 5.

 

szes.--Hypotypes, three complete carapaces, Nos.
211(1), 222(11), 233(iii), from locality 2; two complete

carapaces, Nos. 5w(i), 5w(ii), from locality 5.

".1

m hx.

CHART I

ERROR POIHT FORNATION OF CHEEOYGAH
LE COUETIES OF XICHIGlY

 

Localities

27'3""4

 

 

l 5;

 

 

FAMILY LEPERDITELLIDAE
Escronotella hypercala
Dictyogramma scabratum
Schmidtella fabiformis

FALILY HOLLINIDAE
Adelphobolbina megalia
‘5. papillata
A. papillosa

‘Gtenoloculina eurybathrota

Parabolbina oxzpages

Hollinella cuspibulbata

g. plauta

g. pumila

g, rana

g. vegrandis

FAMILY DhEPANELLIDAE
Bollia disjuncta
FAMILY KLOEDENELLIDAE
Dizygopleura euglzphea
‘2. trisinuata
Kloedenella trisulca
Eukloedenella sp.
FAMILY FRIQITIIDAE
Primitia seriata
FAMILY CYTdFdELLIDAE
Bythogyproidea eriensis
Birdeallella tumida

 

 

Ponderodictya pgnctulifera

Egvellina cuneata
Punctomosea crietata
FAmILY THLIPSURIDAE
Octonaria laevilatata
O. guadricostata

‘9. crescentiformis

prhasnaphora textiligera

FAhlLY BAIRDIIDAE
Bairdia amplectens
.g. emaciata
p, summacuminata
gfljhocyprie devonica
‘g. transpt1xie

p. augueti
B. Teisi

{

'Fubulibairdia windonensie

 

 

 

 

 

 

”W

 

ml

 

 

me

 

cm

 

 

 

 

flwwfl

q
1.. .4

rd

 

 

 

 

 

 

>3>§>

 

 

 

w q>>>

 

 

 

 

 

 

 

 

 

 

mm
31>3>0 $1101»? 311'

 

 

 

 

QC mph

 

 

wwwlw

 

Pb

 

 

a

 

 

 

 

 

 

 

 

 

 

48

CEAfiT I (contd.)

 

Species Localities

 

 

 

 

FAMILY QUASILLITIDAE
Quaeillitee binodusus R
Q. obliguus
.g. ornatus
Bufina coloba
Eug11phe11a sigmoidalis R
ROpolonellus plenus

_ b.—
Trlanbon argutum

Q. acrojubatun
FAMILY BARYCJILIJIDAE
Bagychilina enbrithee
Q. punctostriata

Q. trxphera
Barychilina sp.
FAQILY ELFOIIDAE
Entomis rhomboidea
FALILY incertae cedis
Kirkbvella bellipuncta

Amphieella tenuis C

 

 

 

p»

 

 

 

 

 

 

 

 

 

p.

 

 

 

 

mm
m mm o opp» b»
w
k>>>

 

 

 

 

 

 

 

 

 

(15>

 

p.
n

Abundant, more than 25 valves per 750 grams of

sample.

C = COMHOD, more than 10, but less than 25 valves per
750 grams of sanple.

R = Rare, less than 10 valves per 750 grams of sample.

 

 

CONCLUSICJ

This work on the ostracods of the Riddle Devonian
Ferron Point formation of Cheboygan and Presgue Isle Coun—
ties of hichigan established the identity of 51 species
belonging to 51 genera representing 12 families and four
superfanilies of which one genus and two species are new.

The fossils studied in this work possess the char-
acteristics that are typical of the Liddle Devonian ostra-
cods resembling those reported from other formations of the
same stratigraphic horizon in Kichigan and in the Windom
shale (Hahilton) of New York state.

R. v. Keeling (19523, p. 45) stated that,

The ostracod fauna of this formation (Ferron

Point) is distinct fron that of the underlying
Rochport Quarry linestone and from that of the
overlying Genehaw formation. Its closest affini-
ties are with the fauna of the Bell shale which
underlies the Fockport Quarry limestone.

The present study of the Ferron Point ostracods
established the fact that the ostracod fauna of the Ferron
Point formation is distinct from that of the Rockport Quarry
limestone since no Ferron Point ostracod was found similar
to any of those so far reported from the Hockport Quarry
limestone. But the ostracod fauna of the Ferron Point for-
mation is not very distinct from that of the Genshaw forma—
tion. Out of 51 genera and 51 epeciee listed in this work,

12 genera and 18 species are the sane as those identified

50

51

from the Genshaw formation by Keeling and Tabor (1952),
Keeling and Kilgore (1952), and Keeling and Tabor (1955).
There are some affinities of the Ferron Point ostracods
with those of the Bell shale. It was found in the present
study that eight genera and five species of the Ferron Point
ostracods are similar to those so far reported from Bell
shale. The closest affinities of the Ferron Point ostra-
cods, however, are found with those of the Gravel Point
formation and also with those of the Petoskey formation.
The Gravel Point formation is younger than the Genshaw for-
mation and the Petoekey formation overlies the Charlevoix
formation which, in turn, overlies the Gravel Point formation.

Dr. Jane E. Smith worked on ostracods from Traverse
group of northwestern Southern Peninsula of hichigan. Her
specimens come mainly from Gravel Point and Petoskey forma-
tions. It is found that out of 51 genera and 51 Species
identified from Ferron Point formation, in the present work,
24 genera and 25 species are the same as reported by Dr.
Jane E. Smith (1959) from the Gravel Point formation and
19 genera and 19 species of the Ferron Point ostracods are
similar to those identified, also by the same author, from
the still younger Petoskey formation.

Ostracod fauna, in general, are mostly found in
shale beds and in argillaceous limestones. They are more
abundant in pure shales than in pure limestones, which may

indicate that ostracods prefer muddy water and muddy bottom

52

conditions favorable for shale deposits than clear water
good for limestone deposition. It is true with the Ferron
Point ostracods also since most of the Specimens of the
present collection come from the shale beds of the forma-
tion.

Considering the relative abundance of ostracods
in different geologic formations of the Traverse group strat-
igraphically above and below the Ferron Point formation it
is found that the eubjacent hockport Quarry limestone has
very few ostracods and none of them are similar to those
of Ferron Point Species of the present study. The Bell
shale, underlying the Rockport Quarry limestone, has more
numerous ostracods than Rockport Quarry limestone. The
overlying Genshaw formation which is more calcareous than
the Ferron Point formation has fewer ostracods than the
more shaly Ferron Point formation. The present work reveals
that the ostracods of the Ferron Point formation have more
affinities with those of the Genshaw ostracods than with
those of the Bell shale, though the Genshaw formation is
more calcareous than the Bell shale. It may be due to the
fact that the Genshaw ostracods probably have been more
thoroughly studied than the Bell shale ostracods. Similar
generalization may be made about the other formations of
the Traverse rocks in this area. The limestone formations
of the Traverse group in the area have very few ostracod

species or none at all, but the shaly formations invariably

have some ostracod fauna present in them, and the closer the
lithologic characters of the formations are to those of the
Ferron Point formation the closer affinities of the ostra-
cods of those formations are found with the ostracods of

the Ferron Point formation. Ferron Point ostracods have
closer affinities with those of the younger Gravel Point

and Petoekey formations because lithologically the Gravel
Point formation is shaly and the part of the Petoskey is
highly argillaceous.

Again, the Norway Point formation (Fig. 1) which
has almost similar lithologic characters as the Ferron
Point formation contains 15 genera and 11 species of the
Ferron Point ostracods listed in the present work. No
ostracod fauna has been reported yet from the intermediate
limestone formations (Newton Creek limestone and Alpena
limestone) between the Genshaw and the Norway Point forma-
tions. The same is true with the Charlevoix formation
which consists of purer linestonee and dolomites and from
which no ostracods have been described.

The above discussion makes the writer believe that
further work on Bell shale ostracods will prove that the
Ferron Point ostracods have closer affinities with those
of Bell shale as R. V. Keslizg stated (19523, p. 45).

The presence of the same ostracod species in the

shale formations of different stratigraphic positions in

the Traverse group of the area indicates fluctuation of
the bottom conditions or depositional environment.
Hany of the Ferron Point ostracods show a long time
range. They range from the very early stage of Traverse
to the middle of the Upper Traverse time.
Of all the Specimens collected and identified from

the five localities for this study, the genus Quasillites

 

has the greatest representation. Several hundred individ-

uals were identified as Quasillites in the materials col—

 

lected from localities 2, 3, and 4.
This work on Ferron Point ostracod fauna has brought,
forth some questions that should be answered by some future
workers. All the five localities concerned in this work
are within an area of about 100 square niles; but faunal
distribution in all the localities is quite uneven. Local—
ity l is the most poorly fossiliferous; only 5 genera and
6 species come from this locality, though 60% of the total
material studied came from locality 1. Koreover, most of
the Specimens of this locality are badly weathered and dis-
torted and all are rare. This probably indicates that these
ostracod carapaces were transported here from some other
places. The forms that are present at locality 1 are also
found in the other four localities generally in great nun-
bers. No form is restricted to locality 1 only.
Anothe question that should be solved is the ab-

sence of the host abundant genus Quasillites at localities

 

U:
\5'1

Ct-
\) I
O

C
0
Eu
0
CF
p
(1)
*‘5

l and 5, esneciallv at locali y
the buasillitidae family are present at locality 5, some

genera in great abundance, and only one

(0

nus at locality

 

1; but not a single species of the genus Quasillites was
t

1
.

found at hese two localities. This must be due to some
unknown ecological factors that restricted the thriving

of the guasillites at these localities. It should be noted
that Ponderodictya, one of the most abundant Kiddle Devonian
ostracods, is also missing from collections at l and 5.

All the known outcrop localities of the Ferron Point
formation in this area are studied in the present work. The
study of ostracods of this formation from well samples from
scattered points in the area should complete the study of

the Ferron Point ostracod fauna of the area.

LI”BRATURE CITED

Bassler, R. S., 1941, Ostracoda fron the Devonian (Onondaga)
Chart of Western Tennessee: flash. Acad. Sci. Journ.,

7.

l\)

V01. 31’ 3:00 1’ pp. 21-

, and Kellett, Betty, 1934, Bibliographic Index of

 

Paleozoic Ostracoda: Geol. Soc. Amer., Special
Paper No. 1, 500 pp.

‘.

Brady, G. S., 1330, Report on the Ostracoda Dredged by H. n.

(0

Challenger During the Years 1873-1876: Report on
the Scientific Results of the Voyage of H. h. S.
Challenger, Vol. 1.

Cohee, G. V., 1947, Oil and Gas Investigations, Preliminary
Chart 28, U. S. G. S.

Coley, T. B., 1954, Stratigraphic Distribution and Corre-
lation of Some Liddle Devonian Ostracoda: Journ.
Paleontol., Vol. 28, Ho. 4, PP. 452—64.

Cooper, G. A., and Warthin, Jr., A. S., 1941, Raw Middle
Devonian Stratigraphic Names: Journ. Wash. Acad.
Sci., Vol. 31, p. 260.

Coryell, H. R., 1928, Some Hew Pennsylvanian Ostracoda:
Journ. Paleontol., Vol. 2, Ho. 4, pp. 377—81.

, and Booth, R. T., 1933, Pennsylvanian Ostracoda:

 

A Continuation of the Studv of the Ostracoda Fauna

U

'

fron the flayland Shale, Graham, Texas: Aner. fid—

land Nat., Vol. 14, Ho. 2, pp. 258—78.

U]
Ox

, and halkin, I. S., 1936, Some Hamilton Cstracodes

 

.x’ ,'\ as ur- -~ , 4 1., ~. , h_ .- r a ‘w-
fron hikona, Ontario: kner. nus. LOVltatdo, :0.

0-
f
F.)
"O
to
H
I
f\)
0

Ellis, 3. F., and Iessina, A. R., 1952—1960, CatalOgue of
Ostracoda: Vols. 1—15.

Grabau, A. J., 1899, Geology and Paleontology of Eighteen
Mile Creek and the Lake Shore Sections of Erie County,
new York, Part II, pp. 303-311.

, 1902, Stratigraphy of the Traverse Group of Iich-

 

igan: Mich. Geol. Surv., Ann. Rept., 1901, pp.

163-210.

, and Shiner, H. W., 1910, Forth American Index
Fossils. New York: A. G. Seiler and Conpany, Vol.
2, xlv + 909 pp.

Hake, B. F., and haebius, S. 3., 1937, 1938, Lithology of
the Traverse Group of Central Kichigan: Rich. Acad.
Sci., Arts, and Letters, Paper 23, pp. 447—61.

Hall, James, 1860, Descriptions of the New Species of Fos-
sils fron the Hamilton Group of Western er York,
with Notices of Others from the Same Horizon in Iowa
and Indiana: Bew Yorl State hus. Nat. Hist., 13th
Ann. ’eet., pp. 1—123.

Jones, D. J., 1956, Introduction to Iicrofossils: Harper's
Geo-science Series. flew York: Harper & Brothers.

406 pp.

53

Jones, T. B., 1873, Notes on the Paleozoic Bivalved Ento—

nostraca; No. X — Entomis and Entomidella: Ann.
hag. Nat. Hist., London. Ser. 4, Vol. 11, Ho. 66,
pp. 413—417.

, 1887, Notes on the Paleozoic Bivalved Bntomostraca;

 

No. XXIV. On Some Silurian Genera and Species: Ibid.,
SET. 5, V01. 19’ E0. 114, pp. 400-416.

, 1889, On Some Paleozoic Ostracoda from Pennsylvania:

 

U. S. Amer. Geol., Vol. 4, pp. 337-42, 1 plate.

, 1890a, On Some Paleozoic Ostracoda from North

 

America, Wales, and Ireland: Quart. Journ. Geol.
Soc., London, Vol. 46, pp. 1-31.

, 1890p, On Some Silurian and Devonian Ostracoda

 

from North America, France, and the Bosphorus:
Ibido’ V01. 46, pp. 534—560

, and H011, H. B., 1865, Notes on the Paleozoic

 

Bivalved Entomostaca; No. VI - Some Silurian Species
(Primitia): Ann. hag. Hat. Hist., London. Ser. 3,
Vol. 16, pp. 414—25, pl. 13, 1 table.

, 1886, Notes on the Paleozoic Bivalved Entomostraca;

 

Ho. XX. On the Genus Beyrichia and Some New Species:
Ibid., Ser. 5, Vol. 17, pp. 337—63.

Kelly, W. A., 1940, Guide Book, Tenth Annual Geological
Excursion, Mich. Acad. Sci. Arts, and Letters to

Afton-Onaway District, Kay 25-26.

59

, 1949, Annual Fiel Trip, Hich. Geol. Soc., Horthern
Part of Southern Peninsula of hichigan, June 16 and
17, 1949. 27 pp. (Limeographed).
, and Smith, G. W., 1947, Stratigraphy and Structure
of the Traverse Group in Afton-Onaway Area, Kich-
igan: Bull. Amer. Assoc. Petrol. Geol., Vol. 51,
Ho. 3, pp. 447-69.

Kesling, H. V., 1951, Terminology of Ostracod Carapaces:
Contrib. hus. Paleontol., Univ. hich., Vol. IX,
No. 4, pp. 95-171.
, 1952a, Dimorphism in Devonian Hollinid Ostracods
of North America: Journ. Paleontol., Vol. 26, Ho.
5, pp. 764-71.
, 1952p, Ostracods of the Families Leperditellidae,
Primitiidae, Drepanellidae, Aechminidae, and Kirk-
byidae from the middle Devonian Bell Shale of Hich-
igan: Contrib. mus. Paleontol., Univ. hich., Vol.
X, No. 2, pp. 21—44.
, 19529, Ostracods of the Family Hollinidae from
the Ferron Point Formation of Hichigan: Ibid.,
Vol. X, No. 3, pp. 45-57.
, 1953, Ostracods of the Family Hollinidae from the
Arkona Shale of Ontario: Ibid., Vol. X, No. 9, pp.
205-219.
, 1954a, A New Species of Phlyctiscapha from the
Middle Devonian of Ferron Point Fornation of Xich-

igan: Ibid., Vol. XI, No. 9, pp. 187-92.

6O

, 1954p, Ornamentation as a Character in Specific
Differentiation of Ostracods: Ibid., Vol. XII,
No. 2, pp. 15-21.

, Kavary, 3., Takagi, R. S., Tillman, J. B., and
Wulf, G. B., 1959, Quasillitid and Analenid Ostracods
from the Centerfield Limestone of Western New York:
Ibid., Vol. XV, Ho. 2, pp. 15-51.

, and Kilgore, J. B., 1952, Ostracods of the Fan—
ilies Leperditellidae, Drepanellidae, Glyptopleur—
idae, Kloedenellidae, Barychilinidae, and Thlipsur-
idea from the Genshaw Formation of Hichigan: Ibid.,
Vol. X, No. 1, pp. 1-19.

Keeling, R. V., and hchillan, G. W., 1951, Ostracods of
the Family Hollinidae from the Bell Shale of Rich—
igan: Ibid., Vol. IX, Ho. 2, pp. 45—81.

, and Peterson, R. M., 1956, Middle Devonian Hollinid
Ostracod from the Falls of Ohio: HierOpaleontology,
Vol. 4, No. 2, pp. 129-48.

, and ROgers, K. J., 1957, Size, Lobation, Velate

 

Structures and Ornamentation in Some Beyrichiid

Ostracods: Journ. Paleontol., Vol. 51, To. 5, PP.

997-1009.

, and Tabor, N. B., 1952, Two New Species of Ostra—
cod from the Genshaw Formation (hiddle Devonian)

of hichigan: Journ. Paleontol., Vol. 26, No. 5,

pp. 761-65.

61

, 1333, Ostracods of the Family Iollinidae from the
Genshaw Formation of Yichigan: Contrib. Ius. Paleon-
tol., Univ. hich., Vol. X, Ho. 5, pp. 85-100.

, and Weiss, H., 1955, Ostracods from the Horway

 

Point Formation of michigan: Ibid., Vol. XI, Ho. 5,
pp. 33-76.

Lane, A. C., 1895, The Geology of Lower Hichigan with Ref—
erence to Deep Boring: Geol. Surv. Hich., Vol. V,
Pt. 2, xxiv + 100 pp.

hartin, H. 1., 1957, The Lichigan Geological Survey: Assoc.
Amer. State GeolOgists Journ., Vol. 8, No. 5, pp.
3—15.

choy, F., 1844, A SynOpsis of the Characters of the Car—
boniferous Limestone Fossils of Ireland: London:
Williams and Horgate. 207 pp.
, 851, On Some Hew Cambro—Silurian Fossils: Ann.
Lag. Eat. Hist., London: Ser. 2, Vol. 8, pp. 587-409.

Killer, S. A., 1889—1897, North American Geology and Paleon-
tolog': 1889 (Crustacea, pp. 525—569); Appendix 1,
1892 (Crustacea, pp. 704—718); Appendix 2, 1897
(Crustacea, pp. 786-789); Cincinnati.

Loor, R. C., Lalicker, C. G., and Fischer, A. G., 1952,
Invertebrate Fossils: New York: HcGraw—Hill Book
Co. 766 pp.

Pohl, E. B., 1929, The Liddle Devonian Traverse Group of
Rocks in Hichigan, A Sunmary of Existing Knowledge:

131:). 1-5“1’.

Proc. U. S. Eat. hus., Vol. 76, Art. 14,

62

Pribyl, A., and Snajdr, 1., 950, On New Cstracoda from the
Chotec Linestone - 3Y2 (Hiddle Devonian) of Holyne
Hear Prague (Czech and English with Russian Summary)
Czechoslovakia: Statn. Geol., Ust., Sbornik, Prague,
fasc. 17, Sect. Pal., pp. 101-179, Pls. 1-5.

Bominger, Carl, 1876, Geology of the Lower Peninsula: Geol.
Surv. Mich., 1873-1876, Vol. III, Pt. I, pp. 58—65.

Roth, B., 1929, Some Ostracodes from the Haragan marl, De-
vonian of Oklahoma: Journ. Paleontol., Austin,
Texas, Vol. 5, No. 4, p. 566.

Shiner, H. W., and Shrock, R. B., 1944, Index Fossils of
North America: New York: John Wiley & Sons, Inc.,
pp. 660-33.

Smith, J. B., 1959, "Ostracods from the middle Devonian
Traverse Group of Emmet and Charlevoix Counties
of Hichigan:" Dissertation for Ph.D., University
of Hichigan, Ann Arbor, Hichigan. 201 pp., 20 plates.

Smith, H. L., 1956, Some Ostracods from the Middle Devonian
Ledyard and Wanakah Hembers of the Ludlowville For-
mation in Western New York: Journ. Paleontol., Vol.
50, No. 1, pp. 1-8.

Stewart, G. A., 1927, Fauna of the Silica Shale of Lucas
County: Geol. Surv. Ohio, Ser. 4, Bull. 52, pp.
1-76.
, 1956, Ostracodes of the Silica Shale, Middle De-
vonian of Ohio: Journ. Paleontol., Vol. 10, No. 8,

pp. 739-63.

63

1950, Ostracoda from the hiddle Devonian Bone
,

 

Beds in Central Ohio: Ibid., Vol. 24, E0. 6, pp.
652—66.

, and fiendrix, W. B., 1945, Ostracoda of the Plum

 

Stover,

Swartz,

Brook Shale, Erie County, Ohio: Ibid., Vol. 19,

No. 2, pp. 87-95.

L. B., 1956, Ostracoda from the Windom Shale (Ham-
ilton) of Western New York: Ibid., Vol. 50, No. 5,
pp. 1092-1142.

F. M., 1952, Revision of the Ostracode Family Thlip-
suridae, with Descriptions of Hew Species from the
Lower Devonian of Pennsylvania: Journ. Paleontol.,
Vol. 6, No. 1, pp. 59-50.

, 1956, Revision of the Primitiidae and Beyrichiidee,

 

with New Ostracodes from the Lower Devonian of Peni—
sylvania: Ibid., Vol. 10, No. 7, pp. 541—86.
, and Oriel, S. S., 1948, Ostracoda from the Hiddle

 

Devonian Windom Beds in Western New York: Ibid.,

Vol. 22, No. 5, pp. 541-66.

Tolnachoff, I. P., 1926, On the Fossil Fauna from Per Schei's

Series D from Ellesmere Land: Fram, Second Norwegian
Arctic Exped. 1898-1902, Rept., Oslo, No. 58, pp.
5-106, pls. 1-8.

Turner, H. C., 1959, Middle Devonian Ostracoda from Oil

Wells in Southwestern Ontario: Bull. Amer. Paleon—

tol., Vol. 25, No. 88, pp. 5-52.

Ulrich,

64

E. 0., 1891, few and Little Known American Pal

(D

O—
zoic Ostracoda: Journ. Cincinnati Soc. Nat. Hist.,
Vol. 15, KO. 4, pp. 175-211.

, 1892, Hew Lower Silurian Ostracoda, R0. 1: Aner.

 

Geol., Vol. 10, No. 5, pp. 265—70.

, 1894, The Lower Silurian Ostracoda of hinnesota:

 

hinnesota Geol. and Rat. Hist. Surv., Rept., Vol.
5, Part 2, Chap. 7, pp. 629—95.

, 1900, New American Paleozoic Ostracoda, No. l,

 

Ctenobolbina and Kirkbya: Journ. Cincinnati Soc.
1131:. HiSto , V01. 19, Pp. 179“].86’ p10 80

, and Bassler, R. 8., 1906, Few Anerican Paleozoic

 

Ostracoda: Proc. U. S. Nat. Kus., Vol. 50, pp.

, 1908, Few American Paleozoic Ostracoda, Prelim-

 

inary Revision of the Beyrichiidae with Description
of New Genera: Ibid., Vol. 35: pp. 277-340, pls.
XXXVII—XLIV.

, 1925a, Paleozoic Ostracoda, Their Morphology,

 

Ulrich,

Classification, and Occurrence: Maryland Geol.
Surv. Silurian Vol., pp. 271-591.

E. O., and Bassler, R. S., 1923p, Ostracoda: In
Swartz, C. K., Prouty, J. F., Ulrich, E. 0., and
Bassler, R. 8., Systematic Paleontology of Silurian
Deposits: haryland Geol. Surv., Silurian Vol.,

pp. BOO-704.

Van Pelt, H. L., 1955, Some Ostracodes from the Bell Shale,

hiddle Devonian of hichigan: Journ. Paleontol.,

V01. 7, 1:00 3, pp. 325-42.

Warthin, A. 8., Jr., 1954, Common Ostracoda of the Traverse

Group: Contrib. Kus. Paleontol., Univ. Kich., Vol.
IV, Ho. 12, pp. 205-26.

, 1957, Type Invertebrate Fossils of North America
(Devonian) Beyrichiacea: Philadelphia: Wagner
Free Institute of Science, Cards 1-105.

, 1945, Ibid., Thlipsuridae: Cards 1-82.

, and Cooper, G. A., 1935, New Formation Names in
the Michigan Devonian: Journ. Wash. Acad. Sci.,
Vol. 25, p. 526.

, 1941, New Devonian Stratigraphic Units: Wash.
Acad. Sci. Journ., Vol. 31, No. 5, pp. 179-181.

, 1943, Traverse Rocks of the Thunder Bay Region:
Amer. Assoc. Petrol. Geol. Bull., Vol. 27, No. 5,
PP. 571-95.

Weiss, M., 1954, Ostracods of the Family Hollinidae from

“Ti 1 S on ,

the middle Devonian Formations of hichigan and the
Adjacent Areas: (Abs.) Dissert. Abs., Vol. 14,
No. 8, Microfilm, 1850, Univ. Rich.

C. W., Jr., 1955, The Ostracoda Fauna of the Bird—
song Shale, Helderberg, of Western Tennessee: Journ.

Paleontol., Vol. 9, No. 8, pp. 629—46.

66

Fright, L. H., 1948, A Hand Book of Paleozoic Ostracoda:
Private Publication, 158 pp.

Seventh Annual Field Excursion of the Rich. Acad. Sci.,
Arts, and Letters, Sect. GeOIOgy and HineralOgy,

(may 29-30, 1937).

EXPLANATION OF PLATE I

Eukloedenella sp.

 

Fig. 1, Left lateral view of a female carapa e, X50.

Fig. 2, Right lateral view of a male carapace, X50.
Bapychilina sp.

Fig. 5, Left lateral view of a carapace, X50.
Triaabon argutun, n. sp.
5, Left lateral view of a carapace, X50.
6, Dorsal view of a carapace, X50.
Fig. 7, Interior view of a left valve, X50.

8, Interior view of a right valve, X50.

Fig. 9, Right lateral view of a carapace, X50.
Trianbon acrojubat m, n. Sp.

Fig. 4, Right lateral view of a carapace, X50.

Fig. 10, Left lateral view of a carapace, X50.

Fig. 11, Dorsal view of a carapace, X50.

Fig. 12, Interior view of a right valve, X50.

67

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0
Lu

Barychilina

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(

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L—J
f
0
P3

a

f‘.

‘utul, n. sp.

1.).

r-

 

IIAFZ I

ukloedanclla sp.

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...

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