Cephalopoda - Ammonitida - Polyptychitidae
Alternative spelling: Craspeditidae
Parent taxon: Polyptychitidae according to C. W. Wright et al. 1996
See also Spath 1947 and Wright 1952
Sister taxa: Polyptychitinae, Siberites, Simbirskitinae, Tolliinae
Subtaxa: Craspedites Garniericeratinae Hectoroceras Platylenticeras Praetollia Subcraspedites
Ecology: fast-moving nektonic carnivore
Distribution:
• Cretaceous of Canada (2: British Columbia, Yukon collections), the Czech Republic (2), Germany (1), Greenland (16), Poland (7), the Russian Federation (36), the United Kingdom (1), Yemen (1)
• Jurassic of Greenland (1), the Russian Federation (39), Svalbard and Jan Mayen (1), the United Kingdom (1), Yemen (1)
Total: 109 collections including 271 occurrences