Cephalopoda - Ammonitida - Ptychoceratidae
Alternative spelling: Ptychoceratinae
Parent taxon: Ancyloceratoidea according to S. Bersac and D. Bert 2019
See also Förster 1975, Henderson 1990, Kemper 1964, Landra et al. 2000, Reboulet 1996, Szives 2007 and Wright 1952
Sister taxa: Acrioceratidae, Ancyloceratidae, Hemihoplitidae, Heteroceratidae, Himantoceratidae, Labeceratidae, Leptoceratoididae, Paraspiticeras
Subtaxa: Diptychoceras Inaptychoceras Ptychoceras
Type: Ptychoceras
Ecology: fast-moving nektonic carnivore
Distribution:
• Cretaceous of Angola (1 collection), Antarctica (3), Argentina (1), Australia (1), Canada (5: British Columbia), Colombia (2), the Czech Republic (1), France (8), Georgia (1), Germany (1), Hungary (2), Italy (3), Japan (1), Madagascar (1), Mexico (2), the Russian Federation (1), Spain (2), United States (32: Alaska, California)
Total: 68 collections including 71 occurrences