Mammalia Linnaeus 1758 [Rowe 1988], nom. cl. inval. see Clade Mammalia Linnaeus 1758 [Rowe 2020]
   Cetartiodactyla Montgelard, Catzeflis & Douzery 1997 see Order Cetartiodactyla Montgelard, Catzeflis & Douzery, 1997
     Whippomorpha Waddell, Okada & Hasegawa 1999 see Suborder Whippomorpha
       Cetacea Brisson 1762 see Suborder Cetacea Brisson, 1762
         Family †Protocetidae Stromer, 1908 [paraphyletic?]
           01 Genus †Artiocetus P.D. Gingerich et al., 2001
           02 Genus †Maiacetus Gingerich, ul-Haq, von Koenigswald, Sanders, Smith & Zalmout, 2009
           03 Genus †Aegyptocetus Bianucci & Gingerich, 2011
           04 Genus †Carolinacetus Geisler, Sanders & Luo, 2005
           05 Genus †Crenatocetus McLeod & Barnes, 2008
           06 Genus †Dhedacetus Bajpai & Thewissen, 2014
           07 Genus †Gaviacetus Gingerich, Arif & Clyde, 1995
           08 Genus †Indocetus Sahni & Mishra, 1975
           09 Genus †Kharodacetus Bajpai & Thewissen, 2014
           10 Genus †Makaracetus Gingerich, Zalmout, ul-Haq & Bhatti, 2005
           11 Genus †Natchitochia Uhen, 1998
           12 Genus †Pappocetus Andrews, 1920
           13 Genus †Protocetus Fraas, 1904
           14 Genus †Qaisracetus Gingerich, ul-Haq, Khan & Zalmout, 2001
           15 Genus †Rodhocetus Gingerich, Raza, Arif, Anwar & Zhou, 1994
           16 Genus †Takracetus Gingerich, Arif & Clyde, 1995
           17 Genus †Georgiacetus Hulbert, Petkewich, Bishop, Bukry & Aleshire, 1998
           18 Genus †Babiacetus Trivedi & Satsangi, 1984
           19 Genus †Eocetus Fraas, 1904