Synonyms: Hydrothereuta Ameghino 1889 [objective synonym], Zeuglodonta Ameghino 1889, Zeuglodontes Pictet 1853, Zeuglodontia Pictet 1853
Full reference: W. H. Flower. 1883. On the arrangement of the Orders and Families of existing Mammalia. Proceedings of the Zoological Society of London 1883:178-186
Parent taxon: Cetacea according to P. D. Gingerich et al. 2022
See also Abel 1919, Ameghino 1889, Andrews 1906, Barnes et al. 1985, Benham 1937, Benton 1993, Bergqvist et al. 1999, Bianucci and Gingerich 2011, Bianucci and Landini 2007, Bouetel and Muizon 2006, Carroll 1988, Case 1904, Cope 1889, Cope 1890, El-kheir et al. 2013, Fitzgerald 2010, Flower 1883, Flower and Lydekker 1891, Fordyce and Barnes 1994, Fordyce et al. 1995, Fordyce and de Muizon 2001, Fordyce and Roberts 2009, Fraas 1904, Gadow 1898, Gao and Ni 2015, Geisler and Sanders 2003, Gill 1871, Gill 1872, Gill 1873, Gingerich 2005, Gingerich 2007, Gingerich 2012, Gingerich 2015, Gingerich 2019, Gingerich et al. 2009, Gingerich and Zouhri 2015, Gregory 1910, Harland et al. 1967, Hautier et al. 2014, Hay 1902, Hay 1930, Hernández Cisneros et al. 2017, Hooker 1986, Jaekel 1911, Kellogg 1936, Kohler and Fordyce 1997, Kumar and Sahni 1985, Leidy 1873, Lydekker 1887, Mahdy et al. 2019, Mchedlidze 1970, McKenna 1975, McKenna and Bell 1997, McLeod and Barnes 2008, Miller 1923, Parker and Haswell 1897, Pictet 1853, Portis 1925, Rice 1998, Rice 2002, Simpson 1945, Slijper 1936, Thurmond and Jones 1981, Trouessart 1898, Trouessart 1904, Uhen 1996, Uhen 2001, Uhen 2004, Van Deinse 1931, Whitmore and Sanders 1977, Winge 1921, Zittel 1894 and Zittel 1925
Sister taxa: Ambulocetidae, Anarnak, Anodontocete, Archaeocetus, Argyrocetidae, Balaenodea, Balaenodontae, Balaenoidorum, Berardiopsis miocaenus, Berardiopsis pliocaenus, Canis primigenius, Cetotheriomorphus dubius, Cetotherium priscum, Cetotolites, Globicephalus eocaenus, Halicore maximovitschii, Loncodelphis, Manatus giganteus, Mystacoceta, Nanisocetus, Neoballaenidae, Odontocetoidea, Otaria leclercii, Oxypterus, Pakicetidae, Palaeocetus, Pelagiceti, Procetus, Proteroceta, Protocetidae, Protocetoidea, Remingtonocetidae, Remingtonocetoidea, Rhynchoceti, Tretosphrys, Zeugloceta, Ziphius (Dolichodon) geelongensis, Balanadae
Subtaxa: Basilosauroidea Pontobasileus