ammonites
Tschernyschewia americana Cooper and Grant 1975 (lamp shell)

Strophomenata - Productida - Tschernyschewiidae

Full reference: G. A. Cooper and R. E. Grant. 1975. Permian Brachiopods of West Texas, III. Smithsonian Contributions to Paleobiology 19:795-1921

Belongs to Tschernyschewia according to G. A. Cooper and R. E. Grant 1975

Sister taxa: Productus (Tschernyschewia) mysius, Tschernyschewia fugax, Tschernyschewia geniculata, Tschernyschewia pseudoirginae, Tschernyschewia punjabensis, Tschernyschewia sinensis, Tschernyschewia transindicus, Tschernyschewia typica, Tschernyschewia vicinalis

Type specimen: USNM 152683c, a valve (Ventral valve)

Ecology: stationary low-level epifaunal suspension feeder

Average measurements (in mm): shell 11.6 x 14.3