Cenomanian
Wyoming
Original presentation: Tarrantoceras exile
Original publication: Kennedy, W. J. and W. A. Cobban. 1990. Cenomanian micromorphic ammonites from the Western Interior of the United States. Palaeontology 33(2): 379-422 [p. 394, pl. 3, figs 22-25].
Holotype: USNM 423698.
Type locality: USGS Mesozoic locality 12650, Weston County, Wyoming (Kennedy and Cobban, 1990).
Type horizon: Belle Fourche Shale, Metoicoceras mosbyense Zone (Kennedy and Cobban, 1990).
PaleoDB taxon number: 333416.
References: Kennedy and Cobban (1990b).