ammonites
†order Sauropterygia Owen 1861 (diapsid)

Reptilia - Diapsida

Full reference: R. Owen. 1861. Palaeontology, or a Systematic Summary of Extinct Animals and their Geological Relations. Second Edition. Adam and Charles Black, Edinburgh 1-463

Parent taxon: Diapsida according to P. S. Druckenmiller and A. P. Russell 2008

Sister taxa: Adelosaurus, Araeoscelidia, Archosauromorpha, Claraziidae, Diaptosauria, Endennasauridae, Eosuchia, Fremouwsauridae, Hupehsuchia, Lanthanolania, Mesenosauridae, Pleurosauridae, Rhynchocephalia, Saurosphargidae, Tamaulipasaurus

Subtaxa: Cercidopleura, Dicranopleura, Doliovertebra, Eosauropterygia, Lariosauridae, Nothosauria, Nothosauriformes, Pistosauria, Placodontiformes, Sphenosaurus

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Ecology: