Reptilia - Plesiosauria - Elasmosauridae
Full reference: J. P. O'Gorman. 2019. Elasmosaurid phylogeny and paleobiogeography, with a reappraisal of Aphrosaurus furlongi from the Maastrichtian of the Moreno Formation. Journal of Vertebrate Paleontology 39(5):e1692025:1-24
Parent taxon: Elasmosauridae according to C. V. Miller et al. 2020
See also O'Gorman 2019
Sister taxa: Alexeyisaurus, Alzadasaurinae, Alzadasaurus kansasensis, Alzadasaurus tropicus, Callawayasaurus, Callowayosaurus, Cardiocorax, Chubutinectes, Cimoliasaurus, Cimoliasaurus andium, Cimoliasaurus cantabrigiensis, Cimoliasaurus caudalis, Elasmosaurus amalitskii, Elasmosaurus kurskensis, Elasmosaurus orskensis, Elasmosaurus serdobensis, Elasmosaurus sternbergi, Eromangasaurus, Fluvionectes, Fresnosaurus, Gronausaurus, Jucha, Lagenanectes, Leivanectes, Leurospondylus, Mauisaurus gardneri, Plesiosaurus constrictus, Plesiosaurus crassicostatus, Plesiosaurus gulo, Plesiosaurus gurgitis, Plesiosaurus helmersenii, Plesiosaurus holmesii, Plesiosaurus hoodii, Plesiosaurus mackayii, Plesiosaurus mauritanicus, Plesiosaurus sutherlandi, Pliosaurus gigas, Pliosaurus macrospondylus, Scanisaurus, Stereosaurus, Thalassiosaurus, Thalassiosaurus ischiadicus, Thalassonomosaurus, Thalassonomosaurus nobilis, Wapuskanectes, Weddellonectia, Woolungasaurus, Woolungasaurus glendowerensis, Zarafasaura, Brimosaurus
Subtaxa: Elasmosaurinae Libonectes Thalassomedon
Ecology: aquatic carnivore
Distribution:
• Cretaceous of Antarctica (1 collection), Canada (2: Alberta, Saskatchewan), Japan (7), Morocco (1), United States (15: California, Colorado, Kansas, Montana, Nebraska, South Dakota, Texas, Wyoming)
Total: 26 collections each including a single occurrence