Cephalopoda - Ceratitida - Proptychitidae
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 Arctomeekoceras according to J. Jenks et al. 2013
See also Guex et al. 2005 and Guex et al. 2010
Sister taxa: Arctomeekoceras obtusum, Arctomeekoceras rotundatum, Arctomeekoceras tardum
Type specimen: NMMNH P-62981. Its type locality is JJ1-78, Hot Springs Ridge (JJ-HSC), Bear Lake, which is in a Spathian slope limestone in the Thaynes Formation of Idaho.
Ecology: nektonic carnivore
Average measurements (in mm): shell diameter 56.4
Distribution:
• Triassic of United States (2: Idaho collections)
Total: 2 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.