†family Polycotylidae Williston 1908 (plesiosaur)
PaleoDB taxon number: 100152
Synonym: Dolichorhynchopidae Welles 1962 (taxon 150508)
Parent taxon: Leptocleidia according to E. Frey et al. 2017
Sister taxon: Leptocleididae
Subtaxa: Ceraunosaurus, Cimoliasaurus leucoscopelus, Dolichorhynchops, Edgarosaurus, Eopolycotylus, Georgiasaurus, Manemergus, Mauriciosaurus, Pahasapasaurus, Palmulainae, Palmulasaurinae, Plesiopleurodon, Polycotyilnae, Polycotylinae, Polycotylus brevispondylus, Polycotylus ichthyospondylus tanais, Sulcusuchus, Thililua, Trinacromerum
Type: Polycotylus
Ecology: aquatic carnivore