Silica Formation Unit 9A (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, argillaceous limestone
• Overall sequence: Bioclastic limestone; argillaceous limestone; shale. This unit: "limestone, argillaceous at base to very argillaceous at top, blue-gray, abundant marcasite concretions, weathering to sticky clay when wet. Very fossiliferous, producing most of the common Silica species"
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 38459: 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 | |
Heterophrentis simplex horn coral | |
Cystiphylloides americanum horn coral | |
Planalveolitella parasitica tabulate coral | |
Cephalopoda | |
Protokionoceras sp. Grabau and Shimer 1910 | |
Tornoceras (Tornoceras) uniagnulare ammonite | |
Gastropoda | |
"Platyceras (Platyostoma) cf. lineatum" = Platyostoma lineata, Platyceras (Platyceras) rarispinum, Platyceras (Platyceras) carinatum, Platyceras (Platyceras) bucculentum
"Platyceras (Platyostoma) cf. lineatum" = Platyostoma lineata Conrad 1842 snail
Platyceras (Platyceras) rarispinum Hall 1859 snail
Platyceras (Platyceras) carinatum Hall 1862 snail
Platyceras (Platyceras) bucculentum Hall 1862 snail | |
Bivalvia | |
Mytilarca cordata clam | |
Pseudaviculopecten scabridus scallop | |
Limoptera macroptera, Limoptera curvata, Ptychopteria (Actinopteria) boydi, Leptodesma (Leiopteria) ausablensis, Ptychopteria flabellum
Limoptera macroptera oyster
Limoptera curvata oyster
Ptychopteria (Actinopteria) boydi Conrad 1842 oyster
Ptychopteria flabellum oyster | |
Paracyclas lirata clam | |
Modiomorpha subalata clam | |
| |
Lophophorata | |
Tentaculites bellulus Hall 1876 | |
Strophomenata | |
"Strophodonta "demissa"" = Strophodonta (Strophodonta) demissa, Pholidostrophia nacrea
"Strophodonta "demissa"" = Strophodonta (Strophodonta) demissa Conrad 1842 | |
Protoleptostrophia perplana Conrad 1839 | |
Rhynchonellata | |
Cyrtina "hamiltonensis" Hall 1857 | |
"Brachyspirifer audaculus" = Mediospirifer audaculus
"Brachyspirifer audaculus" = Mediospirifer audaculus Conrad 1842 | |
Cranaena romingeri Hall 1863 | |
Gymnolaemata | |
Stenolaemata | |
Fistuliporidae indet. Ulrich 1882 | |
Leptotrypella sp. Vinassa de Regny 1921 | |
Reptaria stolonifera Rolle 1851 | |
Tentaculita | |
Styliolina fissurella Hall 1879 | |
Malacostraca | |
Trilobita | |
"Dechenella (Dechenella) alpenensis" = Dechenella alpenensis, "Dechenella (Basidechenella) lucasensis" = Basidechenella lucasensis
"Dechenella (Dechenella) alpenensis" = Dechenella alpenensis Stumm 1953 trilobite
"Dechenella (Basidechenella) lucasensis" = Basidechenella lucasensis Stumm 1965 trilobite | |
"Phacops rana" = Eldredgeops rana
"Phacops rana" = Eldredgeops rana Green 1832 trilobite | |
Crinoidea | |
Arthroacantha carpenteri Sea lily |