Cephalopoda - Ammonitida - Acanthoceratidae

Alternative combination: Kastanoceras spiniger

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 Kastanoceras according to C. W. Wright et al. 1996

See also Kennedy and Cobban 1990

Sister taxa: none

Type specimen: USNM 423699, a shell. Its type locality is USGS Mesozoic 22871, Alzada, which is in a Cenomanian marine shale in Montana.

Distribution: found only at USGS Mesozoic 22871, Alzada

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Specimen images are retrieved through the ePANDDA API.