Synonyms: Cetancodonta Arnason et al. 2000, Cetancodontamorpha Spaulding et al. 2009
Full reference: P. J. Waddell, N. Okada, and M. Hasegawa. 1999. Towards resolving the interordinal relationships of placental mammals. Systematic Biology 48(1):1-5
Parent taxon: Cetartiodactyla according to F. Lihoreau et al. 2015
See also Agnarsson and May-Collado 2008, Arnason et al. 2000, Arnason et al. 2004, Asher and Helgen 2010, Boisserie et al. 2011, Boisserie et al. 2005, Boisserie et al. 2003, Prothero et al. 2021, Spaulding et al. 2009, Uhen et al. 2011, Waddell et al. 1999 and Weston and Boisserie 2010
Sister taxa: Achaenodontidae, Ancodonta, Antiacodontidae, Antiacodontinae, Booidea, Bunomerycidae, Cainotherioidea, Choeropotamoidea, Climacoceratidae, Diacodexeidae, Dichobunoidea, Eolantianus, Erlianhyus, Eurytheriidae, Haplobunodontidae, Hsanotherium, Hyodonta, Leptochoerinae, Merycoidodontoidea, Myanmarius, Neoselenodontia, Nonruminantia, Omnivora, Raphenacodus, Ruminantiamorpha, Suiformes, Suoidea, Tapirulidae, Tragulohyus, Trigonolestidae, Tylopoda, Cetruminantia, Entelodontoidea
Subtaxa: Anthracotheriodea Cetacea Cetaceamorpha Hippopotamoidea
Ecology: amphibious herbivore