After McKenna & Bell, 1997, and Bouetel & de Muizon, 2006

<==o †Cetotheriidae Brandt, 1872 sensu stricto (Bouetel & de Muizon, 2006)
   |-- †Mixocetus elysius Kellogg, 1934
   `--+-- †Nannocetus eremus Kellogg, 1929
      `--+--o †Cetotherium Brandt, 1843 [†Plesiocetopsis Brandt, 1873; †Eucetotherium Brandt, 1873]
         |  |-- †C. ambiguum Brandt, 1873
         |  |-- †C. expansus Cope, 1890
         |  |-- †C. helmersenii Brandt, 1871
         |  |-- †C. incertum Brandt, 1873
         |  |-- †C. klinderi Brandt, 1871
         |  |-- †C. leptocentrum Trouessart, 1898 [†C. crassangulum Trouessart, 1898]
         |  |-- †C. maicopicum Spasskii, 1954
         |  |-- †C. megalophysum Cope, 1895
         |  |-- †C. meyeri Brandt, 1873
         |  |-- †C. mysticetoides (Emmons, 1858)
         |  |-- †C. parvum Trouessart, 1898
         |  |-- †C. priscum Brandt, 1843
         |  |-- †C. pusillum Cope, 1890
         |  |-- †C. rathkei Brandt, 1843
         |  `-- †C. furlongi Kellogg, 1925
         `--+--o †Metopocetus durinasus Cope, 1896
            |  |?- †M. vandelli Kellogg, 1941
            |  `-- †M. durinasus Cope, 1896
            `--+-- †Piscobalaena nana Pilleri & Siber, 1989
               `--o †Herpetocetus Van Beneden, 1872 [†Mizuhoptera Hatai, Hayasaka & Masuda, 1963]
                  |-- †H. fujinensis (Hatai, Hayasaka & Masuda, 1963) [†Mizuhoptera fujinensis Hatai et al. 1963]
                  |-- †H. kanayaensis (Hatai, Hayasaka & Masuda, 1963) [†Mizuhoptera kanayaensis Hatai et al. 1963]
                  |-- †H. sendaicus (Hatai, Hayasaka & Masuda, 1963); Kimura & Hasegawa, 2004 [†Mizuhoptera sendaicus Hatai, Hayasaka & Masuda, 1963]
                  `-- †H. scaldiensis Van Beneden, 1872

List of †Cetotheriidae Brandt, 1872 not treated by Kimura & Ozawa (2002), Dooley, Fraser & Luo (2004), or Bouetel & de Muizon (2006):

Mauicetus Benham, 1939
        †M. parki Benham, 1939
        ?†M. brevicolisPinocetus polonicus Czyzewska & Ryziewicz, 1976
    †Tiphyocetus temblorensis Kellogg, 1931
    †Imerocetus karaganicus Mchedlidze, 1964
    †Mesocetus Van Beneden, 1880
        †M. agrami Van Beneden, 1884
        †M. aquitanicus Flot, 1896
        †M. argillarius Roth, 1978
        †M. hungaricus Kadic, 1907
        †M. latifrons Van Beneden, 1880
        †M. longirostris Van Beneden, 1880
        †M. pinguis Van Beneden, 1880
        †M. siphunculus Cope, 1895
    †Isocetus depauwii Van Beneden, 1880
    †Peripolocetus vexillifer Kellogg, 1931
    †Halicetus ignotus Kellogg, 1969
    †Cetotheriomorphus dubius Brandt, 1873
    †Thinocetus arthritus Kellogg, 1969
    †Otradnocetus viridovi Mchedlidze, 1984
    †Heterocetus Van Beneden, 1880
        †H. affinis Van Beneden, 1880
        †H. brevifrons (Van Beneden, 1872)
        †H. guiscardii Capellini, 1877
        †H. sprangii Van Beneden, 1886
    †Amphicetus Van Beneden, 1880
        †A. editus Van Beneden, 1880
        †A. later Van Beneden, 1880
        †A. rotundus Van Beneden, 1880
        †A. verus Van Beneden, 1880
    †Cephalotropis Cope, 1896
        †C. coronatus Cope, 1896
        †C. nectus Kellogg, 1940
    †Piscocetus sacaco Pilleri & Pilleri, 1989
    †Rhegnopsis palaeatlantica (Leidy, 1851) Cope, 1896 [Protobalaena palaeatlantica Leidy, 1851]
    †Nanisocetus

 

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