Cephalopoda - Ammonitida - Acanthoceratidae
Synonym: Metoicoceras defordi Young 1957
Full reference: W. A. Cobban. 1953. Cenomanian ammonite fauna from the Mosby Sandstone of central Montana. United States Geological Survey Professional Paper 243-D:45-55
Belongs to Metoicoceras according to W. A. Cobban and W. J. Kennedy 1991
See also Cobban 1953 and Kennedy and Cobban 1990
Sister taxa: Metoicoceras bergquisti, Metoicoceras crassicostae, Metoicoceras geslinianum, Metoicoceras gibbosum, Metoicoceras latoventer, Metoicoceras muelleri, Metoicoceras praecox, Metoicoceras swallovi
Type specimens:
- Metoicoceras mosbyense: USNM 108315, a shell. Its type locality is USGS Mesozoic 21484, Yellow Water Reservoir, which is in a Cenomanian marine sandstone in the Belle Fourche Formation of Montana.
- Metoicoceras defordi:
Ecology: fast-moving nektonic carnivore
Average measurements (in mm): shell diameter 50.6
Distribution:
• Cretaceous of United States (15: Arizona, Montana, New Mexico, Wyoming collections)
Total: 15 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.