ammonites
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Sphenodon Gray 1831 (rhynchocephalian)

Amniota - Sphenodontia - Sphenodontidae

Parent taxon: Sphenodontinae according to O. W. M. Rauhut et al. 2012

Sister taxa: Cynosphenodon, Oenosaurus, Zapatadon

Subtaxa: none

Ecology: