ammonites
Wyomingites arnoldi Hyatt and Smith 1905 (ceratite)

Cephalopoda - Ceratitida - Meekoceratidae

Alternative combination: Paralecanites arnoldi

Full reference: A. Hyatt and J. P. Smith. 1905. The Triassic cephalopod genera of America. United States Geological Survey Professional Paper 40:1-394

Belongs to Wyomingites according to B. Kummel and G. Steele 1962

Sister taxa: Wyomingites angustatus, Wyomingites aplanatus, Wyomingites scapulatus, Wyomingites whiteanus

Type specimen: Its type locality is Wood Canyon, Aspen Range, which is in a Smithian carbonate limestone in the Thaynes Formation of Idaho

Ecology: nektonic carnivore

Average measurements (in mm): shell width 8.40, shell diameter 29.7