Figure 1.A Sternaspis sp. ventral view with some morphological features B Ventro-caudal shields of some Sternaspis species C Shield parts as herein proposed to distinguish different species (AD: anterior depression, FPP: fan posterior projection) (A modif. after Uschakov 1955, reproduced with permission; B–C modified after von Marenzeller 1890).
Figure 8.Sternaspis costata von Marenzeller, 1879, emended, neotype (CMNH ZW-120) A Complete, ventral view B Ventro-caudal shield C–F Sakhalin Island specimens (ZIRAS 43188), ventro-caudal shields. Bars: A 2 mm B 0.5 mm C 0.9 mm D 1.4 mm E 1.5 mm (Photos D–E: Eijiroh Nishi).