After Nowak, 1990, McKenna & Bell, 1997, de Muizon, 1993, Hamilton, Caballero, Collins & Browell, 2001, Lambert, 2005, and Uhen, 2000–2008 [“The Paleobiology Database”]

<==o Odontoceti Flower, 1867 [Odontoceta Ameghino, 1894; Delphinoceti Abel, 1919; Squaloceti, Abel, 1919] (toothed whales; hammasvalaat)
   |?-o †Hadrodelphis Kellogg, 1966
   |  |-- †H. calvertense Kellogg, 1966 (type)
   |  `-- †H. poseidon Ginsburg & Janvier, 1971
   |?- †Megalodelphis Kellogg, 1944 [nomen dubium]
   |?-o †Pachyacanthus Brandt, 1871
   |  |-- †P. andrussovi Dombrovsky, 1925
   |  |-- †P. bajarunasi Dombrovsky, 1925
   |  |-- †P. letochae Brandt, 1873
   |  `-- †P. suessii Brandt, 1871 [Pachyacanthus trachyspondylus Brandt, 1871]
   |?- †Simocetus rayi Fordyce, 2002 [Simocetidae  Fordyce, 2002]
   |-- Physeteroidea (kaskelotinsukuiset hammasvalaat)
   `--+--+?-o Waipatiidae Fordyce, 1994 [paraphyletic Squalodontoidea Brandt, 1872]
      |  |  |-- †Sulakocetus dagestanicus Mchedlidze 1976
      |  |  `-- †Waipatia maerewhenua Fordyce, 1994
      |  `==o †Rhabdosteidae Gill, 1871 [Eurhinodelphidae Abel, 1901; Eurhinodelphinidae] [Eurhinodelphinoidea de Muizon, 1988] [paraphyletic Squalodontoidea Brandt, 1872]
      |     |?- †Ceterhinops longifrons Leidy, 1877
      |     |?- †Macrodelphinus kelloggi Wilson, 1935
      |     |?- †Rhabdosteus latiradix Cope, 1867 (nomen dubium) (Odontoceti incertae sedis)
      |     |?-o †Argyrocetus Lydekker, 1893 [“Doliodelphis” Wilson 1935 (non Doliodelphis littlei)
      |     |  |-- †A. bakersfieldensis (Wilson 1935)
      |     |  |-- †A. joaquinensis Kellogg 1932 [Doliodelphis littlei Wilson 1935; †Eurhinodelphis extensus Wilson 1935]
      |     |  `-- †A. patagonicus Lydekker 1894
      |     |?- †Phocaenopsis
      |     |--o †Schizodelphis Gervais, 1861 sensu Lambert, 2005
      |     |  |-- †S. barnesi
      |     |  |-- †S. longirostris (Du Bus, 1867) Lambert, 2005 [Eurhinodelphis longirostris Du Bus, 1867; Eurhinodelphis ambiguus Du Bus, 1867; Priscodelphinus elegans Du Bus, 1872; Priscodelphinus morckhoviensis Du Bus, 1872; Priscodelphinus pulvinatus Du Bus, 1872; Schizodelphis longirostris (Du Bus, 1867) Lambert, 2005]
      |     |  `-- †S. sulcutus (Gervais, 1853)
      |     `--+-- †Ziphiodelphis abeli Dal Piaz, 1908
      |        `--+--o †Eurhinodelphis Du Bus, 1867 sensu Lambert, 2005
      |           |  |-- †E. cocheteuxi Du Bus, 1867 [Priscodelphinus crassus Du Bus, 1872; Priscodelphinus declivus Du Bus, 1872; Priscodelphinus robustus Du Bus, 1872]
      |           |  |-- †E. cristatus (Du Bus, 1872)
      |           |  |-- †E. bossi Kellogg, 1925
      |           |  |-- †E. sigmoideus Pilleri, 1985
      |           |  `-- †E. belluensis Pilleri, 1985
      |           `-- Hyperoodontoidea [Ziphoidea] (beaked whales and relatives; nokkavalaansukuiset hammasvalaat)
       `--+-- Platanistoidea Simpson, 1945 [Platanistida Fordyce & de Muizon, 2001] (jokivalaidensukuiset hammasvalaat)
          `-- Delphinida de Muizon, 1988 [Delphinoidea sensu lato] (dolphins and relatives; delfiininsukuiset valaat)

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