Holotype: Specimen MB.C.22726.1 (Ebbighausen Coll.); Illustrated by Korn et al., 2014, text-fig. 13A

2014 Prionoceras vetus Korn, Bockwinkel, Ebbighausen, p. 181, text-figs. 13-14

Pachyconic and subevolute juvenile stage (ww/dm ~ 0.85; uw/dm ~ 0.35 at 2 mm dm), pachyconic and involute adult stage (ww/dm ~ 0.70 at 15 mm dm; umbilicus slightly opened). (from Korn et al., 2014).