Cephalopoda - Ceratitida - Sibiritidae

Full reference: J. Guex, A. Hungerbühler, J. Jenks, D. Taylor, and H. Bucher. 2005. Dix-neuf nouvelles espèces d’ammonites du Spathien (Trias inférieur) de l’ouest américain (Idaho, Nevada, Utah et Californie) : Note préliminaire. Bulletin de Géologie Lausanne 363:1-28

Belongs to Svalbardiceras according to J. Guex et al. 2010

Sister taxa: Svalbardiceras chowadei, Svalbardiceras freboldi, Svalbardiceras qinghaiense, Svalbardiceras spitzbergensis

Type specimen: JGX-528. Its type locality is Hammond Creek JGX-HC30, which is in a Spathian marine limestone in the Thaynes Formation of Idaho.

Ecology: nektonic carnivore

Average measurements (in mm): shell width 6.71, shell diameter 20.0