Chondrichthyes - Lamniformes - Ptychodontidae
Parent taxon: Lamniformes according to M. Amadori et al. 2025
See also Applegate 1970, Cahuzac et al. 2007, Hay 1902, Herman 1977, Jordan 1963, Nelson et al. 2016, Thurmond and Jones 1981 and Woodward 1891
Sister taxa: Acutalamna, Alopiidae, Anacoracidae, Aquilolamnidae, Archaeolamnidae, Carchariidae, Carchariolamna, Cardabiodontidae, Cetorhinidae, Cretoxyrhinidae, Eoptolamnidae, Haimirichiidae, Hybodus dispar, Lamna (Odontaspis) ornata, Lamnidae, Megachasmidae, Mitsukurinidae, Odontaspididae, Orthodon, Otodontidae, Palaeocarcharias, Paraisuridae, Pseudisurus, Pseudocarcharidae, Pseudocarchariidae, Pseudocoracidae, Pseudoisurus tomosus, Pseudoscapanorhynchidae, Serratolamnidae
Subtaxa: Ptychodus
Type: Ptychodus
Ecology: nektonic carnivore
Distribution:
• Paleocene of United States (1: Illinois collection)
• Cretaceous of Brazil (1), Canada (7: Alberta, Manitoba, Saskatchewan), Colombia (1), Croatia (1), Czechia (2), Denmark (1), France (5), Germany (1), India (1), Israel (1), Italy (3), Japan (8), Jordan (1), Kazakhstan (1), Lithuania (5), Mexico (4), Poland (2), the Russian Federation (1), Sweden (1), Ukraine (3), the United Kingdom (2), United States (52: Alabama, Colorado, Georgia, Iowa, Kansas, Mississippi, Montana, Nebraska, New Mexico, South Dakota, Texas, Utah)
Total: 105 collections including 158 occurrences