Cephalopoda - Ammonitida - Holcodiscidae
Full reference: R. W. Imlay. 1960. Ammonites of Early Cretaceous age (Valanginian and Hauterivian) from the Pacific Coast states. United States Geological Survey Professional Paper 334(F):1-228
Belongs to Spitidiscus according to R. W. Imlay 1960
Sister taxa: Holcodiscus (Spitidiscus) escragnollensis, Holcodiscus (Spitidiscus) gibbosulus, Spitidiscus fasciger, Spitidiscus intermedius, Spitidiscus kilapiae, Spitidiscus meneghinii, Spitidiscus riccardii, Spitidiscus rotula, Spitidiscus simitiensis
Type specimen: USNM 129697, a shell. Its type locality is USGS Mesozoic 718, Riddle, which is in a Hauterivian marine siliciclastic in Oregon.
Ecology: fast-moving nektonic carnivore
Average measurements (in mm): shell diameter 28.0
Distribution:
• Cretaceous of United States (2: Oregon collections)
Total: 2 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.