†unranked clade Aristonectinae Otero et al. 2012 (elasmosaur)

Reptilia - Sauropterygia - Elasmosauridae

Full reference: R. A. Otero, S. Soto-Acuña, and D. Rubilar-Rogers. 2012. A postcranial skeleton of an elasmosaurid plesiosaur from the Maastrichtian of central Chile, with comments on the affinities of Late Cretaceous plesiosauroids from the Weddellian Biogeographic Province. Cretaceous Research 37:89-99

Parent taxon: Elasmosauridae according to J. P. O'Gorman et al. 2014

See also Benson and Druckenmiller 2014, Otero et al. 2012 and Otero et al. 2014

Sister taxa: Alexeyisaurus, Alzadasaurinae, Alzadasaurus kansasensis, Alzadasaurus tropicus, Callawayasaurus, Callowayosaurus, Cardiocorax, Cimoliasaurus, Cimoliasaurus andium, Cimoliasaurus cantabrigiensis, Cimoliasaurus caudalis, Elasmosaurinae, Elasmosaurus amalitskii, Elasmosaurus kurskensis, Elasmosaurus orskensis, Elasmosaurus serdobensis, Elasmosaurus sternbergi, Eromangasaurus, Gronausaurus, Hydrotherosaurus, Kawanectes, Leurospondylus, Libonectes, Mauisaurus, 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, Styxosaurinae, Thalassiosaurus, Thalassiosaurus ischiadicus, Thalassomedon, Thalassonomosaurus, Thalassonomosaurus nobilis, Tuarangisaurus, Vegasaurus, Wapuskanectes, Weddellonectia, Woolungasaurus, Woolungasaurus glendowerensis, Zarafasaura, Brimosaurus, Morturneria

Subtaxa: Alexandronectes Aristonectes Futabasaurus Kaiwhekea Tuarangisaurus cabazai

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Ecology: aquatic carnivore

Distribution:

• Cretaceous of Antarctica (3 collections), Argentina (3), Chile (4), Japan (1), New Zealand (3)

Total: 14 collections each including a single occurrence

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