†unranked clade Xenopsaria Benson and Druckenmiller 2014 (plesiosaur)

Reptilia - Sauropterygia

Full reference: R. B. J. Benson and P. S. Druckenmiller. 2014. Faunal turnover of marine tetrapods during the Jurassic–Cretaceous transition. Biological Reviews 89(1):1-23

Parent taxon: Cryptoclidia according to R. B. J. Benson and P. S. Druckenmiller 2014

See also Serratos et al. 2017

Sister taxa: Cryptoclididae, Tricleidia

Subtaxa: Elasmosauridae Leptocleidia

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Ecology: aquatic carnivore

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