†Polyptychoceras (Subptychoceras) Shimizu 1935
Cephalopoda - Ammonitida - Diplomoceratidae
Alternative spelling: Subptychoceras
Full reference: S. Shimizu. 1935. The Upper Cretaceous cephalopods of Japan, Part I. J. Shanghai Sci. Inst.,sec. II 1(11):159-226
Parent taxon: Polyptychoceras according to C. W. Wright et al. 1996
See also Shimizu 1935
Sister taxa: Polyptychoceras (Polyptychoceras), Polyptychoceras pseudogaultinum
Subtaxa: none
Distribution:
• Cretaceous of Japan (2 collections), the Russian Federation (1)
Total: 3 collections each including a single occurrence