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
         Pelagiceti Uhen, 2008
           Family †Basilosauridae Cope, 1868 [paraphyletic?]
             01 Genus †Basilotritus Gol'din & Zvonok, 2013 see Genus Pachycetus Beneden, 1883
             02 Genus †Supayacetus Uhen, Pyenson, Devries, Urbina & Renne, 2011
             03 Genus †Ancalecetus Gingerich & Uhen, 1996
             04 Genus †Basilosaurus Harlan, 1834
             05 Genus †Basiloterus Gingerich, Arif, Bhatti, Anwar & Sanders, 1997
             06 Genus †Chrysocetus Uhen & Gingerich, 2001
             07 Genus †Cynthiacetus Uhen, 2005
             08 Genus †Dorudon Gibbes, 1845
             09 Genus †Masracetus Gingerich, 2007
             10 Genus †Ocucajea Uhen, Pyenson, Devries, Urbina & Renne, 2011
             11 Genus †Saghacetus Gingerich, 1992
             12 Genus †Stromerius Gingerich, 2007
             13 Genus †Zygorhiza True, 1908