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Metoicoceras mosbyense Cobban 1953 (ammonite)

Cephalopoda - Ammonitida - Acanthoceratidae

PaleoDB taxon number: 318407

Synonym: Metoicoceras defordi Young 1957 (taxon 333427)

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

Sister taxa: Metoicoceras bergquisti, 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 width 17.1, shell diameter 50.6