Cephalopoda - Ammonitida - Scaphitidae
Full reference: J. C. Grier and J. W. Grier. 1998. New findings of the ammonite Rhaeboceras, including a new species, from the Pierre Shale of eastern Montana. Journal of Paleontology 72:473-476
Belongs to Rhaeboceras according to J. C. Grier and J. W. Grier 1998
Sister taxa: Ammonites opalus, Rhaeboceras albertense, Rhaeboceras burkholderi, Rhaeboceras coloradoense, Rhaeboceras halli, Rhaeboceras mullananum, Rhaeboceras subglobosum, Rhaeboceras whiteavesi
Type specimen: AMNH 45412, a shell. Its type locality is AMNH 3239, Cedar Creek, which is in a Maastrichtian marine shale in the Pierre Shale Formation of Montana.
Ecology: fast-moving nektonic carnivore
Average measurements (in mm): shell diameter 46.3
Distribution:
• Cretaceous of United States (2: Montana 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.