Cenomanian
Texas
Original presentation: Plesiacanthoceratoides vetula Original publication: Cobban. 1987. Holotype: USNM 388189. Type locality: USGS Mesozoic locality D5900, Niobrara County, Wyoming (Kennedy and Cobban, 1990a). Type horizon: Belle Fourche Shale (Kennedy and Cobban, 1990a). Other specimens: USNM 388190-388197, USNM 420287-420292, USNM 420293. Zonation: Acanthoceras amphibolum zone (Kennedy and Cobban, 1990a). PaleoDB taxon number: not in database. Reference: Kennedy and Cobban (1990a).