†Polyptychoceras (Polyptychoceras) Yabe 1927 (ammonite)
Cephalopoda - Ammonitida - Diplomoceratidae
Parent taxon: Polyptychoceras according to W. J. Kennedy and H. Summesberger 1999
Sister taxa: Polyptychoceras (Subptychoceras), Polyptychoceras pseudogaultinum
Subtaxa: Polyptychoceras (Polyptychoceras) obliquecostatum Polyptychoceras (Polyptychoceras) obstrictum
Ecology: fast-moving nektonic carnivore
Distribution:
• Cretaceous of Antarctica (3 collections), Argentina (1), Austria (1), Japan (10), the Russian Federation (1), United States (1: California)
Total: 17 collections each including a single occurrence