Cephalopoda - Ammonitida - Sphaeroceratidae
Full reference: R. W. Imlay. 1953. Callovian (Jurassic) ammonites from the United States and Alaska Part 2. Alaska Peninsula and Cook Inlet regions. United States Geological Survey Professional Paper 249-B:41-108
Belongs to Xenocephalites according to R. W. Imlay 1953
Sister taxa: Xenocephalites araucanus, Xenocephalites bearpawensis, Xenocephalites grantmackiei, Xenocephalites neuquensis, Xenocephalites nikitini, Xenocephalites vicarius
Type specimen: USNM 108045, a shell. Its type locality is USGS Mesozoic 21341, Iniskin Peninsula, which is in a Callovian marine siliciclastic in the Chinitna Formation of Alaska.
Ecology: fast-moving nektonic carnivore
Distribution:
• Jurassic of United States (2: Alaska 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.