†family Polycotylidae Williston 1908 (plesiosaur)

Reptilia - Plesiosauria - Polycotylidae

Synonym: Dolichorhynchopidae Welles 1962

Parent taxon: Plesiosauroidea according to J. P. O'Gorman and R. A. Otero 2023

See also Benson and Druckenmiller 2014, Buchy et al. 2005, Carpenter 1996, Clark et al. 2024, Delair 1960, Frey et al. 2017, Gasparini and Goñi 1985, Gasparini et al. 2007, Gasparini et al. 2015, Hay 1930, Ketchum and Benson 2010, Ketchum and Benson 2011, Kuhn 1946, Kuhn 1966, Novas et al. 2015, O'Gorman 2015, O'Gorman 2016, O'Gorman 2022, O'Gorman and Gasparini 2013, O'Gorman et al. 2019, O'Gorman et al. 2011, O'Keefe 2001, O'Keefe 2004, O'Keefe 2008, Persson 1963, Salgado et al. 2007, Schumacher 2007, Schumacher and Everhart 2005, Thurmond 1968, Thurmond and Jones 1981, Welles 1943, Welles 1962, White 1940, Williston 1908 and Zverkov et al. 2023

Sister taxa: Cimoliosaurus limnophilus, Cryptoclidia, Cryptoclididae, Elasmosauridae, Euplesiosauria, Franconiasaurus, Leptocleidia, Microcleididae, Opallionectes, Plesiopharos, Plesiopterys, Plesiosauridae, Plesiosaurus, Sthenarosaurus, Westphaliasaurus

Subtaxa: Ceraunosaurus Cimoliasaurus leucoscopelus Edgarosaurus Manemergus Mauriciosaurus Pahasapasaurus Palmulainae Palmulasaurinae Plesiopleurodon Polycotyilnae Polycotylinae Polycotylus brevispondylus Polycotylus ichthyospondylus tanais Sulcusuchus Thililua

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Type: Polycotylus

Ecology: aquatic carnivore

Distribution:

• Cretaceous of Antarctica (2 collections), Argentina (16), Australia (2), Canada (12: Alberta, Manitoba, Northwest Territories, Nunavut, Saskatchewan), Japan (1), Jordan (1), Mexico (2), Morocco (1), New Zealand (8), Poland (2), the Russian Federation (11), Sweden (2), United States (45: Alabama, Colorado, Kansas, Montana, South Dakota, Texas, Utah, Wyoming)

• Jurassic of France (1)

Total: 106 collections including 109 occurrences

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