Brassfield Fm. (Silurian of the United States)

Where: Adams County, Ohio (38.8° N, 83.5° W: paleocoordinates 26.1° S, 53.7° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Cycle I zone, Brassfield Formation, Llandovery (443.4 - 433.4 Ma)

• "early Sil. upper Llandovery. cycle I. Brassfield Fm.- upper thinnly bedded unit"

Environment/lithology: offshore; carbonate and shale

• "sh with coarsely xtaline or ferruginous carbonates; rippling. nearshore. BA2"

Size class: macrofossils

Primary reference: W. B. Harrison and L. K. Harrison. 1975. A Maquoketa-like molluscan community in the Brassfield Formation (Early Silurian) of Adams County, Ohio. Bulletins of American Paleontology 67:193-234 [P. Wagner/P. Wagner/J. Ju]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 448: authorized by Jack Sepkoski, entered by Mike Sommers on 08.12.1998, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

• "W.B. Harrison III and L.K. Harrison, 1975. A Maquoketa-like molluscan community in the Brassfield Fm. (early Sil) of Adams Co., OH. Bull. Am. Paleo 67:193-234"
Show authors, comments, and common names
Scaphopoda
 Dentaliida - Dentaliidae
Plagioglypta sp.
Plagioglypta sp. tusk shell
Hyolitha
 Hyolithida - Hyolithidae
? Elegantilites sp.
? Elegantilites sp. Marek 1966
originally entered as "? Elegantilites sp."
Gastropoda
 Bellerophontida - Tropidodiscidae
Tropidodiscus sp.
Tropidodiscus sp. Meek and Worthen 1866 snail
 Bellerophontida - Bucanellidae
Bucanella sp.
Bucanella sp. Meek 1871 snail
 Bellerophontida - Bucaniidae
? Bucania sp.
? Bucania sp. Hall 1847 snail
originally entered as "? Bucania sp."
 Euomphalina - Holopeidae
? Holopea sp., Cyclora sp.
? Holopea sp. Hall 1847 snail
originally entered as "? Holopea sp."
Cyclora sp. Hall 1845 snail
 Euomphalina - Platyceratidae
Cyclonema sp.
Cyclonema sp. Hall 1852 snail
 Murchisoniina - Lophospiridae
Lophospiridae indet.
Lophospiridae indet. Wenz 1938 snail
 Murchisoniina - Hormotomidae
Hormotoma sp.
Hormotoma sp. Salter 1859 snail
originally Murchisonia
 Murchisoniina - Eotomariidae
Liospira sp.
Liospira sp. Ulrich and Scofield 1897 snail
Cephalopoda
 Nautiloidea -
Nautiloidea indet.
Nautiloidea indet. Agassiz 1847 nautiloid
orthoconic cephalopod
Bivalvia
 Nuculanida - Malletiidae
Palaeoneilo sp.
Palaeoneilo sp. Hall and Whitfield 1869 clam
 Nuculanida - Cucullellidae
Nuculites sp.
Nuculites sp. Conrad 1841 clam
 Solemyida - Ctenodontidae
aff. Ctenodonta sp.
aff. Ctenodonta sp. Salter 1852 clam
originally entered as "aff. Ctenodonta sp."
 Nuculida - Cardiolariidae
Deceptrix sp.
Deceptrix sp. Fuchs 1919 clam
 Nuculida - Praenuculidae
Palaeoconcha sp., Praenucula sp.
Palaeoconcha sp. Miller 1889 clam
originally entered as "Palaeoconchia sp."
Praenucula sp. Pfab 1934 clam
 Unioni - Lyrodesmatidae
Lyrodesma sp.
Lyrodesma sp. Conrad 1841 clam