Cenomanian
New Mexico to Wyoming
Original presentation: Metoicoceras frontierense
Original publication: Cobban. 1988. [p. 13, pl. 3, figs 1-3, pl. 13, figs 1, 2, pl. 14, text-fig. 12].
Types: USGS 376927.
Type locality: Johnson County, Wyoming (USGS locality 22809) (Cobban, 1988).
Type horizon: Frontier Formation (Cobban, 1988).
PaleoDB taxon number: not in database.
References: Cobban (1988).