Arctomeekoceras tardum Guex et al. 2005 (ceratite)

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. Guex et al. 2010

See also Guex et al. 2005

Sister taxa: Arctomeekoceras obtusum, Arctomeekoceras popovi, Arctomeekoceras rotundatum

Type specimen: JGX-521. Its type locality is Hammond Creek JGX-BETA-HC1, Bear Lake Valley, which is in a Spathian marine siltstone in the Thaynes Formation of Idaho.

Ecology: nektonic carnivore

Average measurements (in mm): shell diameter 38.1

Distribution:

• Triassic of United States (3: Idaho collections)

Total: 3 collections each including a single occurrence

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Specimen images are retrieved through the ePANDDA API.


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