It is phylogenetically defined by Sereno et al. (2001) as a clade containing Notosuchus terrestris, Crocodylus niloticus, and all descendants of their common ancestor.

[2] Ziphosuchia Anatosuchus Barcinosuchus Itasuchus Miadanasuchus Trematochampsa Caririsuchus Mahajangasuchidae Peirosauridae Neosuchia The phylogeny of basal metasuchians has experienced many revisions in recent years.

[1] The phylogeny of notosuchians has been particularly revised, with the construction of Sebecia by Larsson and Sues (2007) to include peirosaurids in the clade.

Larsson and Sues (2007) also suggested that Sebecosuchia (containing the families Baurusuchidae and Sebecidae) was polyphyletic, as Baurusuchus was placed outside Sebecia, which itself was placed outside Notosuchia.

Araripesuchus wegeneri Araripesuchus tsangatsangana Araripesuchus buitreraensis Araripesuchus patagonicus Araripesuchus gomesii Uruguaysuchus terrai Uruguaysuchus aznarezi Libycosuchus brevirostris Simosuchus clarki Malawisuchus mwakasyungutiensis Candidodon itapecuruense Notosuchus terrestris Comahuesuchus brachybuccalis Mariliasuchus amarali Yacarerani boliviensis Pakasuchus kapilimai Adamantinasuchus navae Stratiotosuchus maxhechti Pehuenchesuchus enderi Pabwehshi pakistanensis Iberosuchus macrodon Eremosuchus elkoholicus Doratodon Bergisuchus dietrichbergi Baurusuchus salgadoensis Baurusuchus pachechoi Chimaerasuchus paradoxus Sphagesaurus huenei Sphagesaurus montealtensis Sebecus huilensis Sebecus icaeorhinus Itaborai Croc Bretesuchus bonapartei Anatosuchus minor Barcinosuchus gradilis Itasuchus jesuinoi Miadanasuchus oblita Trematochampsa taqueti Caririsuchus camposi Kaprosuchus saharicus Mahajangasuchus insignis Hamadasuchus rebouli Montealtosuchus arrudacamposi Uberabasuchus terrificus Peirosaurus torminni Lomasuchus palpebrosus Neosuchia