Cenomanian
Texas to Colorado
Original presentation: Turrilites acutus
Original publication: Passy. 1832. [p. 334, pl. 16, figs 3, 4].
Lectotype: “The original of Passy (1832, pl. 16, fig. 3) designated by Juignet and Kennedy (1976, p. 65)” (Kennedy and Cobban, 1990a, p. 145).
Type locality: Rouen, Seine-Maritime, France (Kennedy and Cobban, 1990a).
Type horizon: “middle Cenomanian Rouen Fossil Bed of Côte Ste Catherine” (Kennedy and Cobban, 1990a, p. 145).
Other specimens: USNM 420301-420313, OUM KT 2058.
Other occurrences: “western and eastern Europe, the USSR, North Africa, Nigeria, Angola, Zululand, Madagascar and Mozambique” (Kennedy and Cobban, 1990a, p. 146).
Zonation: Acanthoceras amphibolum zone (Kennedy and Cobban, 1990a); Acanthoceras bellense zone (Kennedy and Cobban, 1990a).
PaleoDB taxon number: 130558.
Reference: Kennedy and Cobban (1990a).