PBDB

Silica Formation Unit 7 (7A,7B,7C) (Devonian of the United States)

Where: Ohio (41.7° N, 83.7° W: paleocoordinates 36.4° S, 31.0° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Silica Formation, Givetian (387.7 - 382.7 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; gray, blue, calcareous shale and argillaceous limestone

• Overall sequence: Bioclastic limestone; argillaceous limestone; shale. This unit: "shale, calcareous, blue-gray"; subunit 7A "with occasional argillaceous limestone lens. Contains much water-worn fossil debris"

Primary reference: R. V. Kesling and R. B. Chilman. 1975. Strata and megafossils of the Middle Devonian Silica Formation. University of Michigan Papers on Paleontology 8:1-408 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 38457: authorized by Michael Foote, entered by Michael Foote on 21.04.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

unclassified
-	Atactoechus cf. typicus Atactoechus cf. typicus
Anthozoa
Cystiphyllida - Digonophyllidae	Cayugaea intermittens, Cayugaea ? transitorius Cayugaea intermittens horn coral Cayugaea ? transitorius horn coral
Cystiphyllida - Cystiphyllidae	Cystiphylloides americanum Cystiphylloides americanum horn coral
Stauriida - Zaphrentidae	Heliophyllum bathycalyx, Heliophyllum microcarinatum, Heliophyllum halli Heliophyllum bathycalyx horn coral Heliophyllum microcarinatum horn coral Heliophyllum halli Edwards and Haime 1851 horn coral
Stauriida - Bethanyphyllidae	Bethanyphyllum robustum Bethanyphyllum robustum horn coral
Stauriida - Amplexidae	Heterophrentis simplex Heterophrentis simplex horn coral
Auloporida - Auloporidae	Planalveolitella parasitica, Aulopora microbuccinata Planalveolitella parasitica tabulate coral Aulopora microbuccinata tabulate coral
Auloporida - Aulocystidae	Aulocystis auloporoidea, Aulocystis jacksoni, Aulocystis lucasensis Aulocystis auloporoidea tabulate coral Aulocystis jacksoni tabulate coral Aulocystis lucasensis tabulate coral
Favositida - Pachyporidae	"Trachypora labyrinthica" = Thamnoptychia, "Trachypora minuitissima" = Thamnoptychia, "Trachypora ? projecta" = Thamnoptychia, "Trachypora silicensis" = Thamnoptychia, Cladopora crassa, Cladopora lucasensis, Cladopora minuitissima, Striatopora intermittens "Trachypora labyrinthica" = Thamnoptychia tabulate coral "Trachypora minuitissima" = Thamnoptychia tabulate coral "Trachypora ? projecta" = Thamnoptychia tabulate coral "Trachypora silicensis" = Thamnoptychia tabulate coral Cladopora crassa tabulate coral Cladopora lucasensis tabulate coral Cladopora minuitissima tabulate coral Striatopora intermittens tabulate coral
Favositida - Favositidae	Favosites turbinatus Favosites turbinatus tabulate coral
Favositida - Micheliniidae	Pleurodictyum (Procteria) cornu, Pleurodictyum (Procteria) plana Pleurodictyum (Procteria) cornu tabulate coral Pleurodictyum (Procteria) plana tabulate coral
Crinoidea
Monobathrida - Hexacrinitidae	Arthroacantha carpenteri Arthroacantha carpenteri Sea lily
Blastoidea
Pentremitida - Hyperoblastidae	Hyperoblastus reimanni Hyperoblastus reimanni blastoid
Edrioasteroidea
Isorophida - Agelacrinitidae	Agelacrinites cf. southworthi Agelacrinites cf. southworthi
Trilobita
Phacopida - Phacopidae	"Phacops rana" = Eldredgeops rana "Phacops rana" = Eldredgeops rana Green 1832 trilobite
Bivalvia
Cardiidia - Grammysiidae	Grammysia bisulcata Grammysia bisulcata clam
Modiomorphida - Cypricardiniidae	Cypricardinia indenta Cypricardinia indenta Conrad 1842 clam
Modiomorphida - Modiomorphidae	? Glossites "sp. A", Modiomorpha subalta ? Glossites "sp. A" Hall 1885 clam Modiomorpha subalta clam
Ostreida - Pterineidae	Leptodesma (Leiopteria) ausablensis, Cornellites flabellum, Limoptera macroptera, Limoptera curvata, Ptychopteria flabellum Leptodesma (Leiopteria) ausablensis oyster Cornellites flabellum oyster Limoptera macroptera oyster Limoptera curvata oyster Ptychopteria flabellum oyster
Gastropoda
Euomphalina - Platyceratidae	Platyceras (Platyceras) carinatum, Platyceras (Platyceras) bucculentum, Platyceras (Platyceras) rarispinum, "Platyceras (Platyostoma) cf. lineatum" = Platyostoma lineata Platyceras (Platyceras) carinatum Hall 1862 snail Platyceras (Platyceras) bucculentum Hall 1862 snail Platyceras (Platyceras) rarispinum Hall 1859 snail "Platyceras (Platyostoma) cf. lineatum" = Platyostoma lineata Conrad 1842 snail
Tentaculita
Styliolinida - Styliolinidae	Styliolina fissurella Styliolina fissurella Hall 1879
Lophophorata
Tentaculitida - Tentaculitidae	Tentaculites bellulus Tentaculites bellulus Hall 1876
Stenolaemata
Cystoporata - Fistuliporidae	Fistuliporidae indet., Fistulipora vesiculata Fistuliporidae indet. Ulrich 1882 Fistulipora vesiculata
Cystoporata - Botrylloporidae	Botryllopora socialis Botryllopora socialis
Cryptostomata - Arthrostylidae	Helopora inexpectata Helopora inexpectata
Cryptostomata - Hyphasmoporidae	Streblotrypa anomala, Streblotrypa sp. Streblotrypa anomala Streblotrypa sp.
Cryptostomata - Semicosciniidae	Semicoscinium sp. Semicoscinium sp. Prout 1859
Cryptostomata - Fenestellidae	Reteporina striata Reteporina striata
Cryptostomata - Acanthocladiidae	Penniretepora cf. irregularis Penniretepora cf. irregularis
Cryptostomata -	Intrapora irregularis, Intrapora sp. Intrapora irregularis Intrapora sp. Hall 1883
Cryptostomata - Ptilodictyidae	Stictoporina granulifera Stictoporina granulifera
Trepostomata - Heterotrypidae	Leioclema alpenense Leioclema alpenense
Cyclostomata - Hederellidae	Hederella alpenensis, Hederella bilineata, Hederella cirrhosa, Hederella concinnoides, Hederella delicatula, Hederella filiformis, Hederella magna, Hederella parvirugosa, Hederella rectifurcata, Hederella reimanni, Hederella thedfordensis, Hederella vagans Hederella alpenensis Hederella bilineata Hederella cirrhosa Hederella concinnoides Hederella delicatula Hederella filiformis Hederella magna Hederella parvirugosa Hederella rectifurcata Hederella reimanni Hederella thedfordensis Hederella vagans
Cyclostomata - Reptariidae	Reptaria stolonifera Reptaria stolonifera Rolle 1851
Cystoporida - Sulcoreteporidae	Sulcoretepora deissi Sulcoretepora deissi
Trepostomida - Atactotoechidae	Anomalotoechus tuberatus, Leptotrypella ohioensis, Leptotrypella sp. Anomalotoechus tuberatus Leptotrypella ohioensis Leptotrypella sp. Vinassa de Regny 1921
Rhabdomesida - Rhabdomesidae	Acanthoclema ohioensis, Acanthoclema lineatum, Acanthoclema sulcatum Acanthoclema ohioensis Acanthoclema lineatum Acanthoclema sulcatum
Gymnolaemata
Ctenostomata - Ascodictyidae	Ascodictyon fusiforme, Eliasopora stellatum Ascodictyon fusiforme Eliasopora stellatum
Rhynchonellata
- Tropidoleptidae	Tropidoleptus carinatus Tropidoleptus carinatus Conrad 1839
Terebratulida - Cranaenidae	Cranaena romingeri Cranaena romingeri Hall 1863
Athyridida - Athyrididae	Athyris vittata, Athyris sp. Athyris vittata Athyris sp.
Atrypida - Atrypidae	Atrypa "reticularis", Pseudoatrypa sp., Pseudoatrypa cf. devoniana Atrypa "reticularis" Linnaeus 1758 Pseudoatrypa sp. Copper 1973 Pseudoatrypa cf. devoniana Webster 1921
Spiriferida - Spinocyrtiidae	Spinocyrtia "euryteines", ""Mediospirifer" "audaculus"" = Mediospirifer audaculus, "Brachyspirifer audaculus" = Mediospirifer audaculus Spinocyrtia "euryteines" ""Mediospirifer" "audaculus"" = Mediospirifer audaculus Conrad 1842 "Brachyspirifer audaculus" = Mediospirifer audaculus Conrad 1842
Spiriferida - Mucrospiriferidae	Mucrospirifer prolificus Mucrospirifer prolificus
Spiriferida - Hysterolitidae	Paraspirifer bownockeri Paraspirifer bownockeri
Orthida - Draboviidae	Sphenophragmus cf. nanus Sphenophragmus cf. nanus
Orthida - Schizophoriidae	Schizophoria ferronensis Schizophoria ferronensis
Orthida - Rhipidomellidae	Rhipidomella cf. penelope, Rhipidomella vanuxemi Rhipidomella cf. penelope Rhipidomella vanuxemi Hall 1857
Rhynchonellida - Trigonirhynchiidae	Cupularostrum prolificum Cupularostrum prolificum
Rhynchonellida - Machaerariidae	Callipleura cf. nobilis Callipleura cf. nobilis Hall 1860
Rhynchonellida - Leiorhynchidae	Leiorhynchus lucasi Leiorhynchus lucasi
Spiriferinida - Cyrtinidae	Cyrtina alpenensis, Cyrtina "hamiltonensis" Cyrtina alpenensis Cyrtina "hamiltonensis" Hall 1857
Strophomenata
Strophomenida - Strophodontidae	Pholidostrophia geniculata, Pholidostrophia nacrea, Megastrophia concava, "Strophodonta extenuata" = Strophomena (Strophodonta), "Strophodonta "demissa"" = Strophodonta (Strophodonta) demissa Pholidostrophia geniculata Pholidostrophia nacrea Megastrophia concava "Strophodonta extenuata" = Strophomena (Strophodonta) "Strophodonta "demissa"" = Strophodonta (Strophodonta) demissa Conrad 1842
Strophomenida - Douvillinidae	Hercostrophia robusta, Douvillina distans Hercostrophia robusta Douvillina distans
Strophomenida - Leptostrophiidae	Protoleptostrophia perplana Protoleptostrophia perplana Conrad 1839
Strophomenida - Chonetidae	Devonochonetes fragilis, Devonochonetes coronatus, Longispina lissohybus Devonochonetes fragilis Devonochonetes coronatus Hall 1857 Longispina lissohybus
Orthotetida - Schuchertellidae	Schuchertella sp. Schuchertella sp. Girty 1904
Productida - Productellidae	Spinulicosta spinulicosta Spinulicosta spinulicosta Hall 1857
Productida - Araksalosiidae	Devonalosia wrightorum Devonalosia wrightorum Muir-Wood and Cooper 1960
Craniata
Craniida - Craniidae	Philhedra crenistriatula, Petrocrania hamiltonensis Philhedra crenistriatula Petrocrania hamiltonensis

Life -	Allonema sp. Allonema sp.