After Uhen & Gingerich, 2001

<==o Cetacea Brisson, 1762 [paraphyletic Archaeocete Flower, 1883; Archaeoceti Flower, 1883] (whales; valaat)
   |--o Pakicetidae Gingerich & Russell, 1990
   |  |-- †Ichthyolestes pinfoldi Dehm & Oettingen-Spielberg, 1958
   |  |-- †Nalacetus ratimitus Thewissen & Hussain, 1998
   |  `--o †Pakicetus Gingerich & Russell, 1981
   |     |-- †P. attocki (West, 1980)
   |     `-- †P. inachus Gingerich & Russell, 1981
   `--+?- †Himalayacetus subathuensis Bajpai & Gingerich, 1988
      |?- †Gandakasia potens Dehm & Oettingen-Spielberg, 1958
      |--+-- †Ambulocetus natans Thewissen, Madar & Hussain, 1996 [Ambulocetidae Thewissen, Madar & Hussain, 1996]
      |  `--o †Remingtonocetidae Kumar & Sahni, 1986
      |     |-- †Attockicetus praecursor Thewissen & Hussain, 2000
      |     |?- †Rayanistes afer Bebej, Zalmout, Abed El-Aziz, Antar & Gingerich,, 2016
      |     `--+-- †Dalanistes ahmedi Gingerich, Arif & Clyde, 1995
      |        `--+--o †Remingtonocetus Kumar & Sahni, 1986
      |           |  |-- †R. harudiensis (Sahni & Mishra, 1975) [Protocetus harudiensis Sahni & Mishra, 1975]
      |           |  `-- †R. domandaensis Gingerich, ul Haq, Khan & Zalmout, 2001
      |           `--o †Andrewsiphius Sahni & Mishra, 1975 [taxonomic history]
      |              |-- †A. minor (Sahni & Mishra, 1975) [taxonomic history]
      |              `-- †A. sloani (Sahni & Mishra, 1972) Gingerich, ul Haq, Khan & Zalmout, 2001 [taxonomic history]
      `==o Protocetidae Stromer, 1908 sensu lato [a paraphyletic assemblage]
         |?- †Artiocetus clavis Gingerich, ul Haq, Zalmout, Khan & Malkani, 2001
         |?- †Eocetus schweinfurthi (Fraas, 1904a) Fraas, 1904b [Mesocetus schweinfurthi Fraas, 1904a]
         |?- †Maiacetus inuus Gingerich, ul Haq, von Koenigswald, Sanders, Smith & Zalmout, 2009; M.Eoc. Ind.
         |?- †Natchitochia jonesi Uhen, 1998
         |?- †Pappocetus lugardi Andrews, 1920
         |?- †Quisracetus arifi Gingerich, ul Haq, Khan & Zalmout, 2001
         |?- †Takracetus simus Gingerich, Arif & Clyde, 1995
         |--o †Gaviacetus Gingerich, Arif & Clyde, 1995
         |  |-- †G. razai Gingerich, Arif & Clyde, 1995
         |  `-- †G. sahnii Bajpai & Thewissen, 1998
         `--+--o †Rodhocetus Gingerich et al., 1995a
            |  |-- †R. balochistanensis Gingerich, ul Haq, Zalmout, Khan & Malkani, 2001
            |  `-- †R. kasrani Gingerich et al., 1995a
            `--+--o †Babiacetus Trivedy & Satsangi, 1984
               |  |-- †B. mishrai Bajpai & Thewissen, 1998
               |  `-- †B. indicus Trivedy & Satsangi, 1984
               `--+--o †Protocetidae Stromer, 1908 sensu O'Leary, 1998 [sensu stricto?]
                  |  |-- †Indocetus ramani Sahni & Mishra, 1975 [Indocetinae Gingerich et al., 1993]
                  |  `-- †Protocetus atavus Fraas, 1904a
                  `--+-- †Georgiacetus vogtlensis Hulbert, Petkewich, Bishop, Bukry & Aleshire, 1998
                     |?- †Carolinacetus gingerichi Geisler, Sanders & Luo, 2005
                     `--o Pelagiceti Uhen 2008
                        `==o †Basilosauridae Cope, 1868 emend. Barnes & Mitchell, 1978 [paraphyletic]
                           |?- †Supayacetus muizoni Uhen, Pyenson, Devries, Urbina & Renne, 2011
                           |?- †Stromerius nidensis Gingerich, 2007 [Zeuglodon osiris Stromer, 1903 (in partim); Dorudon zitteli Kellogg, 1936 (in partim)] [Stromeriinae Gingerich, 2007]
                           |?- †Masracetus markgrafi Gingerich, 2007 [Zeuglodon isis, Stromer, 1908 (in partim); Zeuglodon cf. brachyspondylus Stromer, 1908 (in partim); Prozeuglodon isis Kellogg, 1936 (in partim); Zeuglodon cfr. brachyspondylus, Kellogg, 1936; Zeuglodon brachyspondylus Slijper, 1936 (in partim)]
                           `--+?-o †Basilotritus Gol'din & Zvonok, 2013
                              |  |-- †B. uheni Gol'din & Zvonok, 2013
                              |  `-- †B. wardii (Uhen, 1999) [“Eocetuswardii Uhen, 1999]
                              |--o Basilosaurinae Cope, 1868 emend. Barnes & Mitchell, 1978
                              |  |?- †Basiloterus hussaini Gingerich et al., 1997
                              |  `--o †Basilosaurus Harlan, 1834 [Alabamornis Abel, 1906; Hydrarchos Koch, 1845; Hydrarchus Muller, 1849; “Hydrargos” Koch, 1845; “Zeuglodon” Owen, 1839; Zygodon (Owen, 1839)]
                              |     |-- †B. cetoides (Owen, 1839) [Alabamornis gigantea Abel, 1906; Hydrarchos sillimani Wyman, 1845; Hydrargos sillimanii Koch, 1845; Zeuglodon ceti Wyman, 1845; Zeuglodon harlani De Kay, 1842; Zeuglodon macrospondylus Müller, 1849]
                              |     |-- †B. isis (Andrews, 1904) Gingerich et al. 1990 [Zeuglodon, Prozeuglodon]
                              |     `-- †B. drazindai Gingerich et al., 1997
                              |?-o †Cynthiacetus Uhen, 2005
                              |  |-- †C. maxwelli Uhen, 2005
                              |  `-- †C. peruvianus Martínez-Cáceres & Muizon, 2011
                              `--o †Dorudontinae Miller, 1923 emend. Barnes & Mitchell, 1978 [paraphyletic]
                                 |--o †Dorudon Gibbes, 1845 [Zeuglodon]
                                 |  |-- †D. atrox (Andrews, 1906) [Prozeuglodon atrox Andrews, 1906; D. intermedius (Dart, 1923); Prozeuglodon stromeri, Kellogg, 1928; †D. stromeri (Kellogg, 1928) Kellogg, 1936] [=?? Basilosaurus isis??]
                                 |  |?- †D. zitteli (Stromer, 1903)
                                 |  |-- †D. serratus Gibbes, 1845 [Zeuglodon serratum Abel 1913]
                                 |  |?- †D.? sensitivus (Dart, 1923)
                                 |  `?- †D.? elliotsmithii (Dart, 1923)
                                 `--+-- †Ancalecetus simonsi Gingerich & Uhen, 1996
                                    `--+--+-- †Zygorhiza kochii (Reichenbach, 1847) True, 1908
                                       |  `-- †Pontogeneus brachyspondylus (Müller, 1849) [“Zeuglodon” brachyspondylus Müller, 1849]
                                       `--+-- †Saghacetus osiris (Dames, 1894) Gingerich, 1992 [Zeuglodon osiris Dames, 1894; Dorudon osiris (Dames, 1894)]
                                          `--+-- †Chrysocetus healyorum Uhen & Gingerich, 2001
                                             `--o Autoceta sensu McKenna & Bell, 1997
                                                |?- †Ocucaeja picklingi Uhen et al., 2011
                                                `--+?-o †Kekenodontidae Mitchell, 1989
                                                   |  |?- †Phococetus vasconum (Delfortrie, 1873) Gervais, 1876
                                                   |  `?- †Kekenodon onamata Hector, 1881
                                                   `--o Neoceti [Cetacea sensu stricto] (modern whales; nykyvalaat)
                                                      |-- Mysticeti Flower, 1864 (baleen whales; hetulavalaat)
                                                      `-- Odontoceti Flower, 1867 (toothed whales; hammasvalaat)

Cetacea incertae sedis & nomina dubia

    Pelagiceti Uhen, 2008

            †Pontobasilus tuberculatus Leidy, 1873
            †Platyosphys  Brandt, 1873 [nomen dubium]
                †P. paulsonii Brandt, 1873 [type lost in WWII]
                †P. einori Gritsenko, 2001
            †Microzeuglodon caucasicum (Lydekker, 1893) Stromer, 1903 [nomen dubium]
            †Pachycetus Van Beneden, 1883 [nomen dubium]
                †P. humilis Van Beneden, 1883
                †P. robustus Van Beneden, 1883

        †Basilosauridae Cope, 1868

After Martínez-Cáceres & de Muizon, 2011

<==o Cetacea
   |-- †Pakicetidae
   `--+-- †Ambulocetidae
      `--+-- †Remingtonocetidae
         `==o “Protocetidae”
            |--+-- †Protocetus
            |  `-- †Maiacetus
            `--+-- †Georgiacetus
               `--o Pelagiceti
                  |-- Neoceti
                  `--o †Basilosauridae
                     |--+-- †Zygorhiza
                     |  `-- †Chrysocetus
                     `--+--+-- †Ancalecetus
                        |  `-- †Saghacetus
                        `--+-- †Cynthiacetus
                           `--+-- †Dorudon
                              `-- †Basilosaurus

Reference(s):

  • Martínez-Cáceres, M. & de Muizon, C., 2011: A new basilosaurid (Cetacea, Pelagiceti) from the Late Eocene to Early Oligocene Otuma Formation of Peru.
    –Comptes Rendus de l'Académie des Sciencies, Paris: Palevol: Vol. 10, #7, pp. 517-526 [doi: http://dx.doi.org/10.1016/j.crpv.2011.03.006]

After Gol'din & Zvonok, 2013

<==o Cetacea
   |--o †Pakicetidae
   |  `-- †Pakicetus
   `==o †Protocetidae
      |-- †Maiacetus
      `--+-- †Rodhocetus
         `--+-- †Artiocetus
            `--+-- †Qaisracetus
               `--+-- †Aegyptocetus
                  |-- †Protocetus
                  |-- †Carolinacetus
                  |-- †Gaviacetus
                  `--+-- †Eocetus
                     |-- †Georgiacetus
                     `--+-- †Babiacetus
                        `--o Pelagiceti
                           |--+-- †Ocucajea
                           |  `--+-- †Kekenodon
                           |     `-- Neoceti
                           `--o †Basilosauridae
                              |-- †Supayacetus
                              `--+-- †Basilotritus
                                 `--+-- †Zygorhiza
                                    `--+-- †Chrysocetus
                                       `--+--+-- †Ancalecetus
                                          |  `-- †Saghacetus
                                          `--+-- †Cynthiacetus
                                             `--+-- †Dorudon
                                                `-- †Basilosaurus

After Geisler, Sanders & Luo, 2005

<==o Cetacea
   |--o †Pakicetidae
   |  `-- †Pakicetus
   `--+-- †Ambulocetus
      `--+--+-- †Dalanistes
         |  `-- †Remingtonocetus
         `==o †Protocetidae
            |-- †Artiocetus
            `--+-- †Rodhocetus
               `--+-- †Qaisracetus
                  `--+-- †Protocetus
                     |-- †Carolinacetus
                     `--+-- †Georgiacetus
                        `--+-- †Babiacetus
                           `--o †Basilosauridae
                              |--+-- †Eocetus wardii
                              |  `-- †Eocetus schweinfurthi
                              `--+-- †Dorudon
                                 `-- †Basilosaurus

Reference(s):