Cephalopoda - Ammonitida - Himalayitidae

Alternative combination: Aulacosphinctes taffi

Full reference: F. M. Anderson. 1945. Knoxville series in the California Mesozoic. Geological Society America Bulletin 56(10):909-1014

Belongs to Protacanthodiscus according to R. W. Imlay and D. L. Jones 1970

See also Anderson 1945

Sister taxa: Protacanthodiscus andreaei, Protacanthodiscus hexagonus

Type specimen: Its type locality is USGS Mesozoic loc. M2253, Watson Creek, which is in a Tithonian marine sandstone in California.

Distribution: found only at USGS Mesozoic loc. M2253, Watson Creek

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Specimen images are retrieved through the ePANDDA API.