Cephalopoda - Ammonitida - Acanthoceratidae

Full reference: W. J. Kennedy and W. A. Cobban. 1990. Cenomanian micromorphic ammonites from the western interior of the USA. Palaeontology 33:379-422

Belongs to Tarrantoceras according to W. J. Kennedy and W. A. Cobban 1990

Sister taxa: Tarrantoceras (Sumitomoceras), Tarrantoceras (Tarrantoceras), Tarrantoceras cuspidum, Tarrantoceras flexicostatum

Type specimen: USNM 423698, a shell. Its type locality is USGS Mesozoic 12650, Thornton, which is in a Cenomanian marine shale in the Belle Fourche Formation of Wyoming.

Ecology: fast-moving nektonic carnivore

Average measurements (in mm): shell diameter 12.6

Distribution: found only at USGS Mesozoic 12650, Thornton

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Specimen images are retrieved through the ePANDDA API.