†order Sphenacodontomorphi Hay 1930 (reptile)

Reptilia - Sphenacodontomorphi

Full reference: O. P. Hay. 1930. Second Bibliography and Catalogue of the Fossil Vertebrata of North America 390(II):1-1074

Parent taxon: Elpidosauria according to O. P. Hay 1930

Sister taxa: none

Subtaxa: Caseiformes Edaphosauriformes Poliosauriformes Sphenacodontiformes

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Ecology: planktonic suspension feeder

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