Alternative spellings: Sphenodonti, Sphenodonti, Sphenodontina, Spheodontia
Synonyms: Homoeosauri Jaekel 1910, Homoeosauria Jaekel 1910, Sphenodonta
Full reference: O. Jaekel. 1910. Über das System der Reptilien [On the system of reptiles]. Zoologische Anzeiger 35:324-341
Parent taxon: Lepidosauria according to T. R. Simões et al. 2022
See also Alroy 2007, Apesteguía 2005, Apesteguia et al. 2012, Apesteguía and Rougier 2007, Benton 1985, Carroll 1988, Herrera-Flores et al. 2018, Jaekel 1910, Jaekel 1911, Kuhn 1946, Kuhn 1966, Martinelli and Forasiepi 2004, Meyer and Zardoya 2003, Rauhut et al. 2012, Reynoso 1996, Reynoso 2000, Roxo 1937, Sepkoski 2002, Simon and Kellner 2003, Sues and Schoch 2021 and Villa et al. 2021
Sister taxa: Cargninia, Dolichopodus, Euposaurus, Lacertoidopus, Millerosauria, Patricosaurus, Pleurosauria, Prolacertilia, Rhynchocephalia, Sauroeidepus, Weigeltisauria
Subtaxa: Diphydontosaurus Eusphenodontia Godavarisaurus Lamarquesaurus Micromenodon Opisthias Parvosaurus Pelecymala Planocephalosaurus Rebbanasaurus Sauranodonti Sphenocondor Tingitana Whitakersaurus
Ecology: