ammonites
Elivina cordiformis Waterhouse and Waddington 1982 (lamp shell)

Rhynchonellata - Spiriferida - Spiriferellidae

Full reference: J. B. Waterhouse and J. Waddington. 1982. Systematic descriptions, paleoecology and correlations of the late Paleozoic subfamily Spiriferellinae (Brachiopoda) from the Yukon Territory and the Canadian Arctic Archipelago. Geological Survey of Canada Bulletin 289:1-73

Belongs to Elivina according to B.C. Abramov and A.D. Grigorieva 1988

Sister taxa: Elivina bisnaini, Elivina chapursani, Elivina compacta, Elivina detecta, Elivina hoskingae, Elivina occidentalis, Elivina sinensis, Elivina tibetana, Elivina tschernyschewi, Elivina yunnanensis

Type specimen: GSC 27034. Its type locality is GSC 53838, Section 116P-11, Symmetry Mountain, which is in a Roadian marine siliciclastic in Canada.

Ecology: stationary epifaunal suspension feeder

Average measurements (in mm): shell 25.3 x 29.0