Acanthohoplites aschiltaensis var. rotundatus Sinzow, 1908

The subspecies is based on a single, incomplete, moderate-sized phragmocone of an acanthohoplitid from the Mangyshlak Peninsula (Sinzow 1908: pl. 5 figs 2–3). The specimen closely resembles the paralectotype PMU.24108 of Acanthohoplites aschiltaensis (compare with Fig. 6D–H). The rounded whorl section of Acanthohoplites aschiltaensis var. rotundatus cannot be retained as a distinctive conch parameter since its whorl width index (Ww/Wh ~ 1) falls in the variability of the type material. Consequently, it seems unnecessary to separate the subspecies rotundatus from Acanthohoplites aschiltaensis . Other citations of the subspecies rotundatus in the literature differ from true Acanthohoplites aschiltaensis (see synonymy list in Appendix).