Superfamily Hippopotamoidea Gray 1821 (even-toed ungulate)
Synonym: Hippopotamidamorpha Spaulding et al. 2009
Parent taxon: Whippomorpha according to D. R. Prothero et al. 2021
See also Alroy 2011, Boisserie et al. 2011, Boisserie et al. 2003, Carroll 1988, Colbert 1938, Lihoreau et al. 2015, Sahni and Khare 1971, Spaulding et al. 2009 and Weston and Boisserie 2010
Sister taxa: Anthracotheriodea, Cetacea, Cetaceamorpha
Subtaxa: Anthracothema Anthracotheriidae Hippopotamidae Myaingtherium Siamotherium
Ecology: amphibious herbivore