Reptilia - Sauropterygia - Polycotylidae
Synonym: Dolichorhynchopidae Welles 1962
Parent taxon: Leptocleidia according to R. B. J. Benson and P. S. Druckenmiller 2014
See also Buchy et al. 2005, Carpenter 1996, Delair 1960, Ketchum and Benson 2010, Ketchum and Benson 2011, Kuhn 1946, Kuhn 1966, O'Keefe 2001, O'Keefe 2004, O'Keefe 2008, Persson 1963, Schumacher 2007, Schumacher and Everhart 2005, Thurmond 1968, Thurmond and Jones 1981, Welles 1943, Welles 1962, White 1940 and Williston 1908
Sister taxon: Leptocleididae
Subtaxa: Ceraunosaurus Cimoliasaurus leucoscopelus Dolichorhynchops Edgarosaurus Eopolycotylus Georgiasaurus Manemergus Pahasapasaurus Palmulainae Palmulasaurinae Piratosaurus Plesiopleurodon Polycotyilnae Polycotylinae Polycotylus brevispondylus Polycotylus ichthyospondylus tanais Sulcusuchus Thililua Trinacromerum
Ecology: aquatic carnivore
Distribution:
• Cretaceous of Antarctica (1 collection), Argentina (4), Australia (2), Canada (11: Alberta, Manitoba, Northwest Territories, Nunavut, Saskatchewan), Japan (1), Jordan (1), Morocco (1), New Zealand (1), the Russian Federation (6), Sweden (2), United States (41: Alabama, Colorado, Kansas, Montana, South Dakota, Texas, Utah, Wyoming)
• Jurassic of France (1)
Total: 72 collections including 76 occurrences