ammonites
Tschernyschewia fugax Reed 1931 (lamp shell)

Strophomenata - Productida - Tschernyschewiidae

Alternative combinations: Productus (Tschernyschewia) fugax, Strophalosia fugax

Belongs to Tschernyschewia according to M. E. Clapham 2011

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

Ecology: stationary low-level epifaunal suspension feeder

Average measurements (in mm): valve 32.1 x 39.1