Cephalopoda - Ammonitida - Polyptychitidae
Parent taxon: Perisphinctaceae according to A. Lukeneder 2004
See also Alsen 2006, Bogomolov 1989 and Wright et al. 1996
Sister taxa: Holcodiscidae, Isterites, Oosterellidae, Platylenticeratidae
Subtaxa: Craspeditinae Polyptychitinae Siberites Simbirskitinae Tolliinae
Ecology: fast-moving nektonic carnivore
Distribution:
• Cretaceous of Australia (2 collections), Austria (1), Canada (59: British Columbia, Northwest Territories, Nunavut, Yukon), Czechia (2), France (1), Georgia (1), Germany (1), Greenland (53), Mexico (2), Poland (23), the Russian Federation (206), Svalbard and Jan Mayen (11), the United Kingdom (4), United States (50: Alaska, California, Oregon, Washington), Yemen (1)
• Jurassic of Greenland (1), the Russian Federation (39), Svalbard and Jan Mayen (1), the United Kingdom (1), Yemen (1)
Total: 460 collections including 1065 occurrences