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Tarrantoceras exile Kennedy and Cobban 1990 (ammonite)

Cephalopoda - Ammonitida - Acanthoceratidae

PaleoDB taxon number: 333416

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 cuspidum, Tarrantoceras flexicostatum, Tarrantoceras sellardsi

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 width 4.30, shell diameter 12.6