Silica Formation Unit 5A (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; shelly/skeletal, gray, blue, argillaceous limestone

• Overall sequence: Bioclastic limestone; argillaceous limestone; shale. This unit: "limestone, massive, slightly argillaceous, blue-gray; composed of bands of brachiopod 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 38454: 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
Anthozoa
 Auloporida - Aulocystidae
Aulocystis auloporoidea, Aulocystis lucasensis
Aulocystis lucasensis tabulate coral
 Favositida - Pachyporidae
Cladopora roemeri
Cladopora roemeri Billings 1860 tabulate coral
 Favositida - Favositidae
Favosites hamiltoniae, Favosites turbinatus, Emmonsia arbuscula, Emmonsia radiciformis
Favosites hamiltoniae tabulate coral
Favosites turbinatus tabulate coral
Emmonsia arbuscula tabulate coral
Emmonsia radiciformis tabulate coral
 Stauriida - Amplexidae
Heterophrentis simplex
 Stauriida - Zaphrentidae
Heliophyllum halli
Heliophyllum halli Edwards and Haime 1851 horn coral
 Stauriida - Eridophyllidae
Cylindrophyllum delicatulum
 Stauriida - Bethanyphyllidae
Bethanyphyllum robustum
 Stauriida - Disphyllidae
Billingsastraea longicarinata, Hexagonaria anna, Hexagonaria stewartae, Hexagonaria tabulata, Hexagonaria truncata
Hexagonaria anna horn coral
 Cystiphyllida - Cystiphyllidae
Cystiphylloides americanum
Cephalopoda
 Barrandeocerida - Nephriticeratidae
? Nephriticeras sp., ? Heracloceras ? inelegans
 Nautilida - Centroceratidae
? Centroceras sp.
? Centroceras sp. Hyatt 1884 nautiloid
 Oncocerida - Acleistoceratidae
? Acleistoceras sp.
Gastropoda
 Euomphalina - Platyceratidae
"Platyostoma lineatum" = Platyostoma lineata
"Platyostoma lineatum" = Platyostoma lineata Conrad 1842 snail
Bivalvia
 Myalinida - Ambonychiidae
Lophonychia cordata
Lophonychia cordata Stewart 1933 clam
 Ostreida - Pterineidae
Limoptera macroptera
 Modiomorphida - Modiomorphidae
Modiomorpha concentrica, Modiomorpha mytiloides
Modiomorpha concentrica Conrad 1838 clam
Modiomorpha mytiloides Conrad 1841 clam
Strophomenata
 Strophomenida - Chonetidae
Devonochonetes fragilis, Devonochonetes coronatus, Longispina lissohybus
 Strophomenida - Strophodontidae
"Strophodonta "demissa"" = Strophodonta (Strophodonta) demissa, Megastrophia concava
"Strophodonta "demissa"" = Strophodonta (Strophodonta) demissa Conrad 1842
Rhynchonellata
 Atrypida - Atrypidae
Pseudoatrypa cf. devoniana, Atrypa "reticularis"
Atrypa "reticularis" Linnaeus 1758
 Orthida - Schizophoriidae
Schizophoria ferronensis
  - Tropidoleptidae
Tropidoleptus carinatus
 Spiriferida - Mucrospiriferidae
Mucrospirifer prolificus
 Spiriferida - Spinocyrtiidae
Spinocyrtia "euryteines"
 Spiriferinida - Cyrtinidae
Cyrtina alpenensis, Cyrtina umbonata
Stenolaemata
 Trepostomata - Heterotrypidae
Leioclema alpenense