Brachiopods

Hebertellla occidentalis (Hall) - an Ordovician species — *Hebertellla occidentalis* (Hall) – an Ordovician species

Brachiopods are a phylum of bivalves unrelated to clams. They date back to the Cambrian Period and live today. Brachiopods have bilateral symmetry – the left and right side of the shells are mirrors. The top and bottom shells are different. (Clams are the opposite.)

Preservation Code: C = Calcified, Ph = Phosphatic, P = Pyritized, S =Silicified, 1= w/o, matrix, 2 = w/ matrix

Featured specimens are found in Indiana, Kentucky & Tennessee (with surrounding states).

Photos appear BELOW the name. Photos lasted updated 3-29-2022

BRACHIOPODS Period Location* Preservation

* Where I’ve collected it

Acrospirifer duodenarius (Hall) – Jeffersonville Limestone, Eifelian, Middle Devonian, Clark Co., Indiana – S,1 (single valves)

Acrospirifer duodenarius (Hall) - silicified valves, Jeffersonville Limestone — *Acrospirifer duodenarius* (Hall) – silicified valves, Jeffersonville Limestone

Alatiformia varicosa (Conrad) – a small spiriferid, Jeffersonville & Speed Limestone, Eifelian, Middle Devonian, Clark Co., Indiana – S,1,2

Ambocoelia sp. – Fairly rare, Coral Ridge Member, New Providence Shale, basal Middle Mississippian, Jefferson Co., KY – P,1

Ambocoelia sp. - Coral Ridge fauna, basal Borden Formation — *Ambocoelia* sp. – Coral Ridge fauna, basal Borden Formation

Ambocoelia umbonata (Conrad), a very small species common in the Beechwood Limestone, Givetian, Middle Devonian, Nelson & Marion Co., KY – S,2

Anastrophia internascens (Hall) – Waldron Shale, Wenlockian, Middle Silurian, Clark Co., Indiana – C,1

Anthracospirifer spinosa (Hall), widespread in the Chesterian, Upper Mississippian, IN, IL, KY – C,1

Athyris densa (Hall) – Salem Limestone, Meramecean, Middle Mississippian, KY – C,1 (Commonly found crushed)

Athyris spiriferoides (Eaton) – Jeffersonville Limestone, Eifelian, Middle Devonian, Clark Co., Indiana – S,1

Athyris fultonensis (Swallow) – super-abundant in the Speed Limestone, Eifelian, Middle Devonian, Clark Co., IN – C,S,1,2

“Atrypa” sp. (Pseudoatrypa?) – Birdsong Shale, Emsian, Lower Devonian, Decatur Co., Tennessee – C,1

Brachythyris suborbicularis (Hall) – Osagean, Middle Mississippian, Hardin Co., KY – C,1,2

Brachythyris suborbicularis is a large Mississippian brachiopod — *Brachythyris suborbicularis* is a large Mississippian brachiopod

Brevispirifer gregarius (Clapp) – Jeffersonville Limestone, Eifelian, Middle Devonian, Clark Co., Indiana & Jefferson Co., Kentucky – S,1,2 (Mostly in single valves)

Brevispirifer gregarius is so abundant there's a B. gregarius zone in the Jeffersonville Limestone. — *Brevispirifer gregarius* is so abundant there’s a *B. gregarius* zone in the Jeffersonville Limestone.

Camarotoechia acutiplicata Amsden – Brownsport Group, Wenlockian, Middle Silurian, Decatur Co., TN – C,1

Camarotoechia cedarensis Amsden – Bob Fm., Brownsport Group, Wenlockian, Middle Silurian, Decatur Co., TN – C,1

Camarotoechia cedarensis from west Tennessee's Silurian — *Camarotoechia cedarensis* from west Tennessee’s Silurian

Camarotoechia transvera – Birdsong Shale, Emsian, Lower Devonian, Decatur Co., Tennessee – C.1

Chonetes scitulus Hall – Middle Devonian, Ausable River / Hungry Hollow, Ontario, Canada – C,1

Chonetes supergibbosus (2) Middle Devonian Poland C1

Chonetes yandellanus Hall – Sellersburg / North Vernon Limestone, Givetian, Middle Devonian, Clark Co., IN – S,C,1,2 (Mass mortality layers)

Cincinnetina multisecta (Meek) (formerly Onneilla), especially in the Kope Formation, Upper Ordovician, KY – C,1,2. Click here for more info (away from this website).

Cleiothyridina hirsuta (Hall) – Salem Limestone, Meramecean, Middle Mississippian, KY – C,1

Cleiothyridina sublamellosa (Hall) found flattened with spines or inflated w/o spines – Chesterian, Upper Mississippian, IN, IL, KY – C,1

Cleiothyridina sublamellosa with spines & Paleoconchus coiled worms. — *Cleiothyridina sublamellosa* with spines & *Paleoconchus* coiled worms.

Composita trinuclea (Hall) – a wide-ranging species in the Mississippian, found in IN, IL, KY -C,1, S,2

Composita trinuclea is often silicified from the chert in the St Louis & Ste Genevieve Limestones — *Composita trinuclea* is often silicified from the chert in the St Louis & Ste Genevieve Limestones

Cupularostrum tethys (Hall) – Sellersburg / North Vernon Limestone, Givetian, Middle Devonian, Clark Co., IN – S,1,2

Cyrtina hamiltonensis (Hall) – Sellersburg / North Vernon Limestone, Givetian, Middle Devonian, Clark Co., IN – C,S,1,2

Devonochonetes coronatus (Conrad) – Sellersburg / North Vernon Limestone, Givetian, Middle Devonian, Clark Co., IN – S,1,

Diaphragmus cestriensis (Worthen) – Upper Mississippian, western KY – C,1,2

Diaphragmus cestriensis is common in Chester-age rocks — *Diaphragmus cestriensis* is common in Chester-age rocks

Echinoconchus alternatus (Norwood & Pratten) – Middle Mississippian, KY,IN – C,1,2

Echinoconchus alternatus found in Salem Limestone — *Echinoconchus alternatus* found in Salem Limestone

Echinoconchus biseriatus (Hall) – Salem Limestone, Middle Mississippian, Hardin Co., KY – C,1,2

Eodictyonella reticulata (Hall) – Waldron Shale, Middle Silurian, Clark Co., Indiana – C,1,2 (Small brachiopod with a reticulate texture)

Eodictyonella reticulata - a fascinating small Silurian brachiopod. — *Eodictyonella reticulata* – a fascinating small Silurian brachiopod.

Eospirifer eudora (Hall) – Waldron Shale, Middle Silurian, Clark Co., Indiana – C,1

Eospirifer radiata (Hall) – Waldron Shale, Middle Silurian, Clark Co., Indiana – C,1

Eospirifer radiata is common and robust in Waldron Shale — *Eospirifer radiata* is common and robust in Waldron Shale

Eumetria vera (Hall) – Salem Limestone, Middle Mississippian, IN, KY – C,1 (Very small species)

Coolinia subplana (Hall) – Waldron Shale, Middle Silurian, Clark Co., Indiana – C,1,2 (Very flat) Previous known as Fardenia.

Coolinia subplana, the flattest brachiopod In the Waldron Shale — *Coolinia subplana*, the flattest brachiopod In the Waldron Shale

Gotatrypa muldae (Copper) – Waldron Shale, Middle Silurian, Clark Co., Indiana – C,1 (Most abundant brachiopod)

Hebertella occidentalis (Hall), Upper Ordovician, KY, IN – C,1,2 (Very common, though perfect specimens less so)

Hebertella occidentalis is common Upper Ordovician brachiopod — *Hebertella occidentalis* is common Upper Ordovician brachiopod

Heterorthina emacerata (Hall) – was Onneilla – Kope Formation, Upper Ordovician, Carroll Co., KY – C,1,2

Hiscobeccus capax (Conrad) – Upper Ordovician, IN, KY – C,1,2 (Used to called Lepidocyclus)

Hiscobeccus capax is common in the Liberty Formation — *Hiscobeccus capax* is common in the Liberty Formation

Homeospira evax (Hall) – Waldron Shale, Middle Silurian, Clark Co., Indiana – C,1

Inflatia inflatia Upper Mississippian KY C,1,2

“Invertrypa” spinosa? Middle Devonian IN S,1

Kozlowskiellina octacostata tennessensis Amsden – Birdsong Shale, Early Devonian, Decatur Co., Tennessee – C,1,2

Kozlowskiellina octacostata tennessensis looks shingled. ~2 cm wide — *Kozlowskiellina octacostata tennessensis* looks shingled. ~2 cm wide

Labriproductus scitulus Middle Mississippian IN S,2

Leptaena acuticuspidata Amsden – Birdsong Shale, Early Devonian, Decatur Co., Tennessee – C,1,2

Leptaena acuticuspidata - a small species with lots of detail. — *Leptaena acuticuspidata* – a small species with lots of detail.

Leptaena rhomboidalis (Wilckens) – Waldron Shale, Middle Silurian, Clark Co., Indiana C,1,2

Leptaena rhomboidalis Early Devonian TN C,1

Leptaena rhomboidalis Middle Devonian IN C,1,2

Leptaena richmondensis – found in certain Upper Ordovician formations in Indiana, Kentucky and Ohio – C,1,2

Leptaena richmondensis is common in the Liberty Formation — *Leptaena richmondensis* is common in the Liberty Formation

Linoproductus cora (d’Orbigny), Borden Formation, Osagean, Middle Mississippian, IN, KY – C,1,2

Linoproductus cora from the Borden Formation — *Linoproductus cora* from the Borden Formation

Marginatia(?) crawfordsvillensis Weller – Borden Formation, Middle Mississippian, IN, KY – C,2

Marginatia crawfordsvillensis in the New Providence Shale / Borden delta sediments — *Marginatia crawfordsvillensis* in the New Providence Shale / Borden delta sediments

Marginata burlingtonensis (Meek & Worthen) – St. Louis Limestone, Middle Mississippian IN, KY – C,1,2

Marginata burlingtonensis is a Salem Limestone species — *Marginata burlingtonensis* is a Salem Limestone species

Marginirugus magnus (Meek & Worthen) – Harrodsburg Limestone, Middle Mississippian IN – C,1,2 (One of the largest species in the U.S.)

Marginirugus magnus is the largest brachiopod in the central U.S. — *Marginirugus magnus* is the largest brachiopod in the central U.S.

Mediospirifer audaculus (Conrad) – Sellersburg / North Vernon Limestone, Givetian, Middle Devonian, Clark Co., IN – S,C,1,2 (Spirifer oweni in older texts)

Mediospirifer audaculus has an elongate triangular delthyrium on pedicale valve — *Mediospirifer audaculus* has an elongate triangular delthyrium on pedicale valve

Mediospirifer? segmentum Middle Devonian IN S,1

Megakozlowskiellina perlamellosa (Hall) – Birdsong Shale, Early Devonian, Decatur Co., Tennessee – C,1

Megakozlowskiellina perlamellosa about 1.5 cm wide. — *Megakozlowskiellina perlamellosa* about 1.5 cm wide.

Megastrophia concava (Conrad) – Jeffersonville Limestone, Middle Devonian, IN, KY – C,S,2

Megastrophia concava is the largest brachiopod in the Jeffersonville Limestone. This one has remnants of an inarticulate brachiopod attached. — *Megastrophia concava* is the largest brachiopod in the Jeffersonville Limestone. This one has remnants of an inarticulate brachiopod attached.

Megastrophia profunda Middle Silurian IN C,2

Merista tennessenesis ” ” TN C,1

Meristella maria (Hall) – Waldron Shale, Middle Silurian, Clark Co., Indiana – C,1

Mucrospirifer arkonensis (Grabau) Middle Devonian ONT C,1,2

Mucrospirifer thedordensis (Grabau) ” ” ONT, MI C,1,2

Orbiculoidea keokuk Middle Mississippian KY Ph,2

Orbiculoidea sp. – Glen Dean Formation, Chesterian, Upper Mississippian, Grayson Co., KY, – Ph,1,2 (Usually a small inarticulate brachiopod.)

Orbiculoidea sp. - a tiny specimen from the Glen Dean Formation — *Orbiculoidea* sp. – a tiny specimen from the Glen Dean Formation

Orthorhynchula linneyi Upper Ordovician, Boyle Co., KY – S,C,1

Orthotetes keokuk (Hall), Borden Formation, Osagean, Middle Mississippian, IN, KY – C,2 (A large, common productid brachiopod in the formation.)

Orthotetes keokuk in siltstone — *Orthotetes keokuk* in siltstone

Ovatia ovatia Upper Mississippian KY C,1,2

Paraspirifer acuminatus (Conrad) – Jeffersonville Limestone, Eifelian, Middle Devonian, Clark Co., IN -S,1 (Single valves are common, complete rare in the P. acuminatus zone)

Paraspirifer acuminatus with sponge? borings — *Paraspirifer acuminatus* with sponge? borings

Paraspirifer acuminatus interior — *Paraspirifer acuminatus* interior

Pentamerella pavilionensis (Hall) – Jeffersonville Limestone, Middle Devonian, IN, KY – C,S,1,2

Pentamerella pavilionensis has a distinctive triangular shape. — *Pentamerella pavilionensis* has a distinctive triangular shape.

Pentamerus oblongata (Sowerby), Laurel & Louisville Limestones, Wenlockian, Middle Silurian, Jefferson & Nelson Co., KY – S,1,2

Pentamerus oblongata is found in Laurel Dolostone & Louisville Limestone — *Pentamerus oblongata* is found in Laurel Dolostone & Louisville Limestone

Pentagonia peersi (Cozzens) – Beechwood Limestone, Givetian, Middle Devonian Clark Co., IN – S,1 (Single shells, the better-known P. unsulcata is Eifelian age.)

Pentagonia peersi - almost resembles a Bellerophon snail shell. — *Pentagonia peersi* – almost resembles a Bellerophon snail shell.

Perditocardia dubia (Hall) – Salem Limestone, Meramecean, Middle Mississippian, IN, KY – S,C,1,2 (Interior of the shell looks like a little heart.)

Perditocardia dubia is common in the Salem Limestone. — *Perditocardia dubia* is common in the Salem Limestone.

Petrocrania is a type of inarticulate brachiopod. It’s not that it can’t talk, but rather, the two valves are not articulated with a tooth & socket system like articulate brachiopods.

Petrocrania chesterensis Upper Mississippian KY,IN C,2 (on crinoid columns)

Petrocrania hamiltonensis (Hall) – Eifelian & Givetian, Middle Devonian, Clark Co., IN – S,2

Petrocrania hamiltonensis on Megastrophia concava, Jeffersonville Limestone — *Petrocrania hamiltonensis* on *Megastrophia concava*, Jeffersonville Limestone

Petrocrania scabiosa (Hall) – Upper Ordovician, IN, KY – C,2

Petrocrania scabiosa is usually not larger than 1 cm. This is the upper valve. — *Petrocrania scabiosa* is usually not larger than 1 cm. This is the upper valve.

Petrocrania siluriana (Hall) – Waldron Shale, Middle Silurian, Clark Co., Indiana C,2

Several Petrocrania siluriana on Uncinulus stricklandi from Waldron Shale — Several *Petrocrania siluriana* on *Uncinulus stricklandi* from Waldron Shale

Pholidostrophia iowensis (Owen) – Speed Limestone, Eifelian, Middle Devonian, Clark Co., IN – C,2

Possible Pholidostrophia iowensis from the Speed Limestone — Possible *Pholidostrophia iowensis* from the Speed Limestone

Platystrophia (now called Vinlandostrophia) is an abundant brachiopod in the Upper Ordovician. It can be found in Indiana, Kentucky, Ohio, and Tennessee. Although not specifically attributed, as the Kentucky State Fossil – the brachiopod, I would assign to this genus. It isn’t unusual to find the interior of these brachiopods lined with calcite crystals, and occasionally dolomite and celestine.

Platystrophia cypha C,1,2

Platystrophia ponderosa C,1,2

Platystrophyia laticosta C,1,2

Productid brachiopods reach their greatest diversity in the Carboniferous. There are many genera, including Echinoconchus, Marginorugus, Ovatia, etc.

Productus altonensis Norwood & Pratten – Upper Mississippian, IL, IN, KY = C,1,2

Productus altonensis is named for Alton, Illinois — *Productus altonensis* is named for Alton, Illinois

Productus marginicinctus – St. Louis Limestone, Middle Mississippian, IN, KY – C,S, 1,2

Productus marginicinctus in chert from Corydon, Indiana — *Productus marginicinctus* in chert from Corydon, Indiana

Productus teniucostatus – St. Louis Limestone, Middle Mississippian, IN, KY – C,S, 1,2

Productus teniucostatus - an uncommon species in the Salem & St Louis Limestones — *Productus teniucostatus* – an uncommon species in the Salem & St Louis Limestones

Protoleptostrophia is a very flat, thin brachiopod. The pink color of the calcite may be due to something in the original shell composition or a random variation of mineralization.

Protoleptostrophia perplana (Conrad) – Jeffersonville & Speed Limestones, Middle Devonian, Clark Co., IN – C,1,2

Protoleptostrophia perplana is widespread in Devonian, Jeffersonville & Speed Limestones — *Protoleptostrophia perplana* is widespread in Devonian, Jeffersonville & Speed Limestones

Pseudoatrypa sp. – Jeffersonville & Sellersburg Limestones, Middle Devonian IN, MI – S,C,1

Three small specimens of Pseudoatrypa. — Several small specimens of *Pseudoatrypa.*

Pseudoatrypa tennesseneensis (Amsden), Brownsport Group, Middle Silurian, Decatur Co., TN – C,1

Punctospirifer spinosa (Hall), widespread in the Chesterian, Upper Mississippian, IN, IL, KY – C,1

Punctospirifer sp. – Glen Dean Formation, Chesterian, Upper Mississippian, Grayson Co., KY – C,1

Punctospirifer sp. about 1 cm wide — *Punctospirifer* sp. about 1 cm wide

Rafinesquina ponderosa Ulrich – Upper Ordovician, IN, KY – C,1,2 (Ponderosa = ponderous, large)

Rafinesquina ponderosa has convex & concave valves — *Rafinesquina ponderosa* has convex & concave valves

Resserella elegentula (Hall) – Waldron Shale, Middle Silurian, Clark Co., Indiana – C,1,2

Rhipidomella hybrida Hall – Waldron Shale, Middle Silurian, Clark Co., Indiana – C,1,2

Rhipidomella oweni (Hall) – Middle Mississippian KY C,1

Rhipidomella penelope (Hall) – Jeffersonville & Speed Limestones, Eifelian, Middle Devonian, IN, KY – S,C,1,2

Rhipidomella penelope is common in the Speed Limestone — *Rhipidomella penelope* is common in the Speed Limestone

Rhipidomelloides emarginata – Birdsong Shale, Emsian, Lower Devonian, Decatur Co., IN – C,1

Discomyorthis oblata (Hall) – Birdsong Shale, Emsian, Lower Devonian, Decatur Co., IN – C,1

Rhynchopora beecheri Middle Mississippian KY P,1

Rhynchospirina globosa (Amsden) – Birdsong Shale, Emsian, Lower Devonian, Decatur Co., IN – C,1

Rhynchospirina globosa is very small (3 cm FOV) — *Rhynchospirina globosa* is very small (3 cm FOV)

Rhynchotreta americana (Hall) – Waldron Shale, Middle Silurian, Clark Co., Indiana – C,1,2

Schizophoria striatula Middle Devonian IN C,1,2

Schizoramma fissiplica (Roemer) – Brownsport Group, Wenlockian, Middle Silurian, Decatur Co., TN – C,1

Schuchertella woolworthana (Hall) – Birdsong Shale, Early Devonian, Decatur Co., Tenneessee – C,2

Schuchertella woolworthana is nearly 4 cm wide. — *Schuchertella* *woolworthana* is nearly 4 cm wide.

Sieberella roemeri (Hall & Clarke) – Brownsport Group, Wenlockian, Middle Silurian, Decatur Co., TN – C,1,2

Sieberella roemeri pedicle valve view — *Sieberella roemeri* pedicle valve view

Sieberella roemeri dorsal valve / rear view — *Sieberella roemeri* dorsal valve / rear view

Sieberella knotti (Nettleroth) – Waldron Shale, Middle Silurian, Clark Co., Indiana C,1,2 (Restricted to Clark Co. Waldron)

Sowerbyella rugosa (Meek) – Kope Formation, Upper Ordovician, KY – C,1,2

Sowerbyella rugosa - and abundant fairly small brachiopod of the Ordovician — *Sowerbyella rugosa* – and abundant fairly small brachiopod of the Ordovician

Sphaerirhynchia compressa Middle Silurian TN C,1

Sphaerirhynchia saffordi ” ” TN C,1

Sphaerirhynchia sp. Middle Silurian TN C,1

Spinatrypa spinosa Middle Devonian MI C,1

Spinocyrtia granulosa (Hall) – Sellersburg / North Vernon Limestone, Givetian, Middle Devonian, Clark Co., IN – S,C,1,2 (Orthospirifer fornacula in older texts)

Spinocyrtia granulosa is the most common of the Sellersburg (North Vernon) Limestone spiriferids — *Spinocyrtia granulosa* is the most common of the Sellersburg (North Vernon) Limestone spiriferids

Spinulicosta spinulicosta (Hall) – Sellersburg / North Vernon Limestone, Givetian, Middle Devonian, Clark Co., IN – S,1,2

Spirifer bifurcutus Hall – Salem & St. Louis Limestone, Middle Mississippian, IN, KY – S,C,1,2

Spirifer bifurcutus is a common spiriferid brachiopod in the Salem Limestone — *Spirifer bifurcutus* is a common spiriferid brachiopod in the Salem Limestone

Spirifer byrnesi Middle Devonian, IN – S,1

Spirifer hobbsi Nettelroth – Maybe Alatiformia – Middle Devonian, Clark Co., IN – S,C,1,2

Spirifer washingtonensis Hall – Salem Limestone, Meramecean, Middle Mississippian, IN, KY – C,2

Spirifer washingtonensis has an extremely wide hinge-line, like some Devonian Mucrospirifer. — *Spirifer washingtonensis* has an extremely wide hinge-line, like some Devonian *Mucrospirifer*.

Stegerhynchus acinus (Hall) – Waldron Shale, Middle Silurian, Clark Co., Indiana C,1

Smallest Waldron brachiopod is Stegerhynchus acinus — Smallest Waldron brachiopod is *Stegerhynchus acinus*

Stegerhynchus indianensis (Hall) – Waldron Shale, Middle Silurian, Clark Co., Indiana – C,1

Largest of Waldron species of Stegerhynchus indianensis — Largest of Waldron species of *Stegerhynchus indianensis*

Stegerhynchus neglecta (Hall) – Waldron Shale, Middle Silurian, Clark Co., Indiana – C,1

Stegerhynchus neglecta from the Waldron Shale, Middle Silurian, Clark Co., Indiana — *Stegerhynchus neglecta* from the Waldron Shale, Middle Silurian, Clark Co., Indiana

Stegerhynchus whitii (Hall) – Waldron Shale, Middle Silurian, Clark Co., Indiana – C,1

Strophodonta demissa (Conrad) – Speed Limestone, Eifelian, Middle Devonian, Clark Co., IN – C,1,2

Strophodonta demissa is a common species in the Speed Limestone — *Strophodonta demissa* is a common species in the Speed Limestone

Strophodonta plicata (Hall)? – Speed Limestone, Eifelian, Middle Devonian, Clark Co., IN – C,1,2 (Lower in strata than typical for species, so it could be another species)

Possible Strophodonta plicata from the Speed Limestone — Possible *Strophodonta plicata* from the Speed Limestone

Strophomena concordensis Foerste – Arnheim (Grant Lake) Formation, Upper Ordovician, IN, KY, OH – C,1,2

Strophomena concordensis - an index fossil with limited stratigraphic distribution. — *Strophomena concordensis* – an index fossil with limited stratigraphic distribution.

Strophomena planumbona (Hall) – Upper Ordovician, IN, KY – C,1,2

Distinct from Rafinesquina is Strophomena planumbona — Distinct from *Rafinesquina* is *Strophomena planumbona*

Subglobochonetes planumbona Middle Mississippian KY C,1

Tegulocera (Spirifer) tenuicostata Middle Mississippian KY C,1,2

Torynifer salemensis ” ” KY C,1,2

Trematis millipunctata Hall – Upper Ordovician, IN, KY, OH – C,2 (Inarticulate brachiopod has an unusual texture that is recognizable. Widespread throughout the Cincinnatian, but not common.)

Trematis millipunctata has a pattern on "holes" in the valve — *Trematis millipunctata* has a pattern on “holes” in the valve

Trematis millipunctata - almost 2 cm across — *Trematis millipunctata* – almost 2 cm across

Tropidoleptus carinatus (Conrad), Middle Devonian IN S,1

Uncinulus stricklandi (Sowerby) – Waldron Shale, Middle Silurian, Clark Co., Indiana – C,1

Whitfieldella nitida (Hall) – Waldron Shale, Middle Silurian, Clark Co., Indiana – C,1

Zygospira modesta (Hall) – Upper Ordovician, IN, KY – C,1 (Very small species)

Zygospira sp. – Upper Ordovician, Boyle Co., KY – S,2