After McKenna & Bell, 1997, Kimura & Ozawa, 2002, Dooley, Fraser & Luo, 2004, Bouetel & de Muizon, 2006, Fitzgerald, 2006, 2010, Deméré, McGowen, Berta & Gatesy, 2008, and Bisconti, Lambert & Bosselaers, 2013

<==o Mysticeti Gray, 1864 [non? Flower, 1864] (baleen whales; hetulavalaat)
   |?- †Willungacetus aldingensis Pledge, 2005
   |?-o †Kekenodontidae Mitchell, 1989
   |  |?- †Phococetus vasconum (Delfortrie, 1873) Gervais, 1876
   |  `?- †Kekenodon onamata Hector, 1881
   |?- †Aetiocetidae genera et species indet. [U. Olig. SWNA.] [Olivares-Bañuelos et al., 2001]
   `--+--+-- †Llanocetus denticrenatus Mitchell, 1989 [Llanocetidae Mitchell, 1989, Llanocetinae Mitchell, 1989]
      |  `--o †Mammalodontidae Mitchell, 1989 [incl. Janjucetidae Fitzgerald, 2006]
      |     |-- †Janjucetus hunderi Fitzgerald, 2006
      |     `--o †Mammalodon Pritchard, 1939 [‘Mammalodon’ Hills, 1958]
      |        |-- †M. colliveri Pritchard, 1939 [‘Mammalodon’ colliveri Hills, 1958; Mammalodon pritchardi Pledge & Rothausen, 1977 (lapsus calami)]
      |        `-- †M. hakataramea Fordyce & Marx, 2016
      `==o †Aetiocetidae Emlong, 1966 [paraphyletic]
         |?- †Ashorocetus eguchii Barnes & Kimura in Barnes et al., 1995
         |--+-- †Chonecetus sookensis Russell, 1968 [Chonecetinae Barnes, Kimura, Furusawa & Sawamura, 1994]
         |  `-- †Morawanocetus yabukii Kimura & Barnes in Barnes et al., 1995
         `--+--+--o †Fucaia Marx, Tsai & Fordyce, 2015
            |  |  |-- †F. buelli Marx, Tsai & Fordyce, 2015
            |  |  `-- †F. goedertorum (Barnes & Furasawa in Barnes et al., 1995) Marx, Tsai & Fordyce, 2015 [†Chonecetus goedertorum Barnes & Furasawa in Barnes et al., 1995]
            |  `--o †Aetiocetus Emlong, 1966 [Aetiocetinae Emlong, 1966]
            |     |?- †A. tomitai Kimura & Barnes in Barnes et al., 1995
            |     |-- †A. polydentatus Sawamura in Barnes et al., 1995
            |     `--+-- †A. weltoni Barnes & Kimura in Barnes et al., 1995
            |        `-- †A. cotylalveus Emlong, 1966
            `--o Chaeomysticeti Mitchell, 1989
               |?- †Horopeta umarere Tsai & Fordyce, 2015
               |--o †Eomysticetoidea Sanders & Barnes, 2002
               |  |?-o †Tokarahia Boessenecker & Fordyce, 2015b [Mauicetus in partim]
               |  |  |-- †T. kauaeroa Boessenecker & Fordyce, 2015b [type]
               |  |  `-- †T. lophocephalus (Marples, 1956) [Mauicetus lophocephalus Marples, 1956]
               |  |?-o †Tohoraata Boessenecker & Fordyce, 2015c [Mauicetus in partim]
               |  |  |-- †T. raekohao Boessenecker & Fordyce, 2015c [type]
               |  |  `-- †T. waitakiensis (Marples, 1956) Boessenecker & Fordyce, 2015c [Mauicetus waitakiensis]
               |  |?- †Yamatocetus canaliculatus Okazaki, 2012
               |  `--o †Cetotheriopsidae (Brandt, 1872) [incl. Eomysticetidae Sanders & Barnes, 2002
               |     |--+-- †Waharoa ruwhenua Boessenecker & Fordyce, 2015a
               |     |  `--o †Eomysticetus Sanders & Barnes, 2002
               |     |     |-- †E. carolinensis Sanders & Barnes, 2002
               |     |     `-- †E. whitmorei Sanders & Barnes, 2002
               |     `--+--o †Cetotheriopsis Brandt, 1871 [incl.? †Aulocetus Brandt, 1871]
               |        |  |-- †C. calaritanus (Capellini, 1899) [†Aulocetus calaritanus Capellini, 1899]
               |        |  |?- †C. latus (Kellogg, 1940) [†Aulocetus latus Kellogg, 1940]
               |        |  |-- †C. lovisati (Capellini, 1899) [†Aulocetus lovisati Capellini, 1899]
               |        |  |-- †C. molassicus (Jaeger, 1835) [†Balaenoptera molassicus Jaeger, 1835; Aulocetus molassicus (Jaeger, 1835) Trouessart, 1898]
               |        |  `-- †C. lintianus (von Meyer, 1849) [†Balaenodon lintianus von Meyer, 1849]
               |        `--o †Micromysticetus Sanders & Barnes, 2002
               |           |-- †M. rothauseni Sanders & Barnes, 2002
               |           `-- †M. tobieni Sanders & Barnes 2002
               `--o Balaenomorpha sensu Bisconti, Lambert & Bosselaers, 2013
                  |--o Balaenoidea Brandt, 1873 sensu Mitchell, 1989
                  |  `-- Balaenidae Gray, 1821 (right whales; sileävalaat)
                  `--o Thalassotherii sensu Bisconti, Lambert & Bosselaers, 2013
                     `==o Cetotheriidae Brandt, 1872 sensu lato [paraphyletic]
                        |-- USNM 187416
                        `--+-- †Joumocetus shimizui Kimura & Hasegawa, 2010
                           `--+--o †Parietobalaena Kellogg 1924
                              |  |-- †P. affinis Van Beneden 1880
                              |  |-- †P. campiniana Bisconti, Lambert & Bosselaers 2013
                              |  |-- †P. laxata Van Beneden 1880, p. 23
                              |  |-- †P. palmeri Kellogg 1924, p. 2
                              |  |-- †P.? securis Kellogg 1931, p. 343
                              |  `-- †P. yamaokai Otsuka & Ota 2008
                              `--+--+-- †Uranocetus gramensis Steeman, 2009
                                 |  `--+-- †“Agleocetus” patulus Kellogg, 1968
                                 |     `-- †Pelocetus calvertensis Kellogg, 1965 [Pelocetidae Steeman, 2007]
                                 `--+-- †Isanacetus laticephalus Kimura & Ozawa, 2002
                                    `--+--+-- †Diorocetus hiatus Kellogg, 1968 [Diorocetidae Steeman, 2007]
                                       |  `-- Cetotheriidae Brandt, 1872 sensu Bouetel & de Muizon, 2006 [incl. Neobalaenidae Gray, 1873 sensu Marx & Fordyce, 2016] (cetotheres; ketoteerit)
                                       `--+-- †Cophocetus oregonensis Packard & Kellogg, 1934
                                          `--+-- †Titanocetus sammarinensis Capellini, 1901
                                             |--o †Aglaocetus Kellogg, 1934 [Aglaocetidae Steeman, 2007] [monophyly questioned]
                                             |  |-- †A. moreni (Lydekker, 1894) [Cetotherium moreni Lydekker, 1894] [type]
                                             |  |?- †A. latifrons (Van Beneden, 1880)
                                             |  |?- †A. burtini (Van Beneden, 1859)
                                             |  `?- †A. rotundus (Van Beneden, 1880)
                                             `--o Baleanopteroidea Gray, 1868 sensu Mitchell, 1989)
                                                |--o †Mauicetus Benham, 1939 [Lophocephalus Benham, 1937, preocc.]
                                                |  |-- †M. parki (Benham, 1937) [Lophocephalus parki Benham, 1937]
                                                |  `?- ?†M. brevicollis
                                                |?- †Eobalaenoptera harrisoni Dooley, Fraser & Luo, 2004
                                                |--o Eschrichtiidae Ellerman & Morrison-Scott, 1951 [, Rhachianectidae] (gray whales; harmaavalaat)
                                                |  |-- †Archaeschrichtius ruggieroi Bisconti & Varola, 2006
                                                |  `--+-- †Eschrichtioides gastaldii (Strobel, 1881) Bisconti, 2008 [Cetotherium gastaldii Strobel, 1881; Balaenoptera gastaldii Portis, 1885; Eschrichtioides gastaldii Bisconti, 2008]
                                                |     `--o Eschrichtius Gray, 1864b [†Rhachianectes] U.Plio.-R. Pac.
                                                |        |-- †E. sp. [U.Plio., EAs. (Hokkaido)] [Ichishima, Sato, Sagayama & Kimura, 2006]
                                                |        `-- E. robustus (Lilljeborg, 1861) Gray, 1864 [Balaenoptera robusta Lilljeborg, 1861] (gray whale; harmaavalas)
                                                `-- Balaenopteridae Lacépède, 1804 [non Gray, 1864] (rorquals; uurteisvalaat)


Mysticeti incertae sedis:

Siphonocetus Cope, 1895
        †S. clarkianus Cope, 1895
        †S. expansus (Cope, 1869)
        †S. priscus Cope, 1895
    †Ulias moratus Cope, 1895 (nomen dubium)
    †Tretulias buccatus Cope, 1895 (nomen dubium)
    †Eucetites juliensis Ameghino, 1901
  
List of †“Cetotheriidae” Brandt, 1872 with switching positions:

Note: List contains dublicate names in itself and with the main cladogram presented.

Mesocetus Van Beneden, 1880
        †M. agrami Van Beneden, 1884
        †M. aquitanicus Flot, 1896
        †M. hungaricus Kadic, 1907
        †M. latifrons Van Beneden, 1880
        †M. pinguis Van Beneden, 1880
        †M. siphunculus Cope, 1895
    †Tiphyocetus temblorensis Kellogg, 1931
    †Imerocetus karaganicus Mchedlidze, 1964
    †Isocetus depauwii Van Beneden, 1880
    †Peripolocetus vexillifer Kellogg, 1931
    †Cetotheriomorphus dubius Brandt, 1873
    †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
    †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 (nomen nudum)
    
    †Diorocetidae Steeman, 2007
        †Amphicetus Van Beneden, 1880
            †A. editus Van Beneden, 1880
            †A. later Van Beneden, 1880
            †A. rotundus Van Beneden, 1880
            †A. verus Van Beneden, 1880
        †Plesiocetus garopii van Beneden, 1859 [Balaenoptera musculoides van Beneden, 1880]
        †Uranocetus gramensis Steeman, 2009
        †Diorocetus hiatus Kellogg, 1968
        †Thinocetus arthritus Kellogg, 1969

    †Aglaocetidae Steeman, 2007
        †Aglaocetus Kellogg, 1934
            †Aglaocetus moreni (Lydekker, 1894) [Cetotherium moreni Lydekker, 1894] [type]
            †Aglaocetus latifrons (Van Beneden, 1880)
            †Aglaocetus burtini (Van Beneden, 1859)
            †Aglaocetus rotundus (Van Beneden, 1880)
        †Isanacetus laticephalus Kimura & Ozawa, 2002
        †Pinocetus polonicus Czyzewska & Ryziewicz, 1976
    
    †Pelocetidae Steeman, 2007
        †Cophocetus oregonensis Packard & Kellogg, 1934
        †Diorocetus hiatus Kellogg, 1968
        †Halicetus ignotus Kellogg, 1969
        †Pelocetus calvertensis Kellogg, 1965
        †Parietobalaena Kellogg 1924
            †P. affinis Van Beneden 1880
            †P. campiniana Bisconti, Lambert & Bosselaers 2013
            †P. laxata Van Beneden 1880, p. 23
            †P. palmeri Kellogg 1924, p. 2
            †P.? securis Kellogg 1931, p. 343
            †P. yamaokai Otsuka & Ota 2008

    †Trenatocetidae Gol'din & Steeman, 2015
        †Trenatocetus argillarius (Roth, 1978) Gol'din & Steeman, 2015 [Mesocetus argillarius Roth, 1978]
        †Mesocetus longirostris Van Beneden, 1880
        †Mixocetus elysius Kellogg, 1934
        †“Cetotherium” megalophysum Cope, 1895
        †“Aulocetus” latus Kellogg, 1940 [Cetotheriopsis latus (Kellogg, 1940)]
        †Metopocetus vandelli Kellogg, 1941 [“Cetotherium” vandelli]
        †“Plesiocetopsis hupschiisensu Van Beneden, 1886
    

After Gol'din & Steeman, 2015

<==o Mysticeti
   |-- †Eomysticetus
   `--+--+-- †Peripolocetus vexifiller
      |  `--o Balaenidae
      |     |-- †Morenocetus parvus
      |     |-- †Balaenella brachyrhynus
      |     `--+-- Eubalaena glacialis
      |        `--  Balaena mysticetus
      `--+--+-- †Thinocetus arthritus
         |  `-- †Diorocetus hiatus
         `--+--+-- †Parietobalaena palmeri
            |  `--+-- †Parietobalaena campianiana
            |     `--+--+-- †Otradnocetus viridovi
            |        |  `-- †Parietobalaena securis
            |        `--+--+-- †Pinocetus polonicus
            |           |  `--+-- †Cephalotropis ssp.
            |           |     `--o Neobalaenidae
            |           |        |-- †Miocaperea pulchra
            |           |        `-- Caperea marginata
            |           `--o †Cetotheriidae
            |              |-- ZIRM V28/1
            |              `--+-- †Joumocetus shimizui
            |                 `--+--+-- †Kurdalagonus mchedlidzei
            |                    |  `--+-- †Eucetotherium helmersenii
            |                    |     |-- †Brandtocetus chongulek
            |                    |     |-- †“Cetotherium meyeri”
            |                    |     `--o †Cetotherium
            |                    |        |-- †C. riabinini
            |                    |        `-- †C. rathkii
            |                    `--+-- †Metopocetus durinasus
            |                       `--+-- †Herentalia nigra
            |                          `--+-- †Piscobalaena nana
            |                             `--+-- †Nannocetus eremus
            |                                `--o †Herpetocetus
            |                                   |-- †H. bramblei
            |                                   |-- †H. transatlanticus
            |                                   `-- †H. morrowi
            `--+--+-- †Isanacetus laticephalus
               |  |-- †“Idiocetus” longifrons
               |  `-- †Agleocetus patulus
               `--+-- †Pelocetus calvertensis
                  `--+--o †Trenatocetidae
                     |  |-- †Mixocetus elysius
                     |  `--+--+-- †Mesocetus longirostris
                     |     |  `-- †Trenatocetus argillarius
                     |     `--+-- †“Cetotherium” vandelli
                     |        `--+-- †“Aulocetus” latus
                     |           `-- †“Cetotherium” megalophysum
                     `--+-- †Uranocetus gramensis
                        `--+-- †Titanocetus sammarinensis
                           `--+--o Eschrichtiidae
                              |  |-- †Eschrichtioides gastaldii
                              |  `-- Eschrichtius robustus
                              `--o Balaenopteridae
                                 |--+-- †Plesiobalaenoptera quarantellii
                                 |  `-- †Archaebalaenoptera castriarquati
                                 `--o Balaenoptera
                                    |-- B. musculus
                                    `-- B. acutorostrata

Reference(s):

  • Gol'din, P. & Steeman, M. E., 2015: From Problem Taxa to Problem Solver: A New Miocene Family, Tranatocetidae, Brings Perspective on Baleen Whale Evolution.
    –Plos One: Vol. 10, #9, art. e0135500 [doi: 10.1371/journal.pone.0135500]

After Bisconti, Lambert & Bosselaers, 2013

<==o Mysticeti
   |-- †Mammalodon colliveri
   `--+-- †Aetiocetus weltoni
      `--o Chaeomysticeti
         |--+-- †Eomysticetus whitmorei
         |  `-- †Micromysticetus rothauseni
         `--o Balaenomorpha
            |--o Balaenoidea
            |  |-- Caperea marginata
            |  `--o Balaenidae
            |     |-- †Balaenula astensis
            |     |-- Eubalaena glacialis
            |     |-- Balaena mysticetus
            |     `-- †Balaenella brachyrhynus
            `--o Thalassotherii
               |-- USNM 187416
               `--+-- †Joumocetus shimizui
                  `--+--o †Parietobalaena
                     |  |-- †P. palmeri
                     |  `-- †P. campianiana
                     `--+--+-- †Uranocetus gramensis
                        |  `--+-- †“Agleocetus” patulus
                        |     `-- †Pelocetus calvertensis
                        `--+-- †Isanacetus laticephalus
                           `--+--+-- †Diorocetus hiatus
                              |  `--o †Cetotheriidae
                              |     |-- †Mixocetus elysius
                              |     `--+-- †Cetotherium rathkei
                              |        `--+-- †Piscobalaena nana
                              |           `-- †Metopocetus durinasus
                              `--+-- †Cophocetus oregonensis
                                 `--+-- †Aglaocetus moreni
                                    |-- †Titanocetus sammarinensis
                                    `--o Baleanopteroidea
                                       |--o Eschrichtiidae
                                       |  |-- †Archaeschrichtius ruggieroi
                                       |  `--+-- †Eschrichtioides gastaldii
                                       |     `-- Eschrichtius robustus
                                       `--o Balaenopteridae
                                          |--+-- †Archaebalaenoptera castriarquati
                                          |  `--+-- †“Plesiocetus” cortesii var. portisi
                                          |     `-- †Protororqualus cuvieri
                                          |--+-- †Plesiobalaenoptera quarantellii
                                          |  `-- †Parabalaenoptera baulinensis
                                          |-- Megaptera novaeangliae
                                          |--o Balaenoptera
                                          |  |-- B. physalus
                                          |  |-- B. musculus
                                          |  |-- B. acutorostrata
                                          |  |-- B. borealis
                                          |  `-- B. edeni
                                          |-- †“Balaenoptera” siberi
                                          |-- †“Megaptera” hubachi
                                          `-- †Diunatans luctoretemergo

Reference(s):

  • Bisconti, M., Lambert, O. & Bosselaers, M., 2013: Taxonomic revision of Isocetus depauwi (Mammalia, Cetacea, Mysticeti) and the phylogenetic relationships of archaic ‘cetothere’ mysticetes.
    –Palaeontology: Vol. 56, #1, pp. 95-127 [doi: 10.1111/j.1475-4983.2012.01168.x]

After Kimura & Hasegawa, 2010

<==o Mysticeti
   |-- †Aetiocetus
   `--+-- †Eomysticetus
      `--+--o Balaenidae
         |  |-- Eubalaena
         |  `-- Neobalaena
         `--+--+-- Eschrichtius
            |  `--o Balaenopteridae
            |     |-- Megaptera
            |     `-- Balaenoptera
            `--+--+-- †Isenacetus
               |  `--+--+-- †Pelocetus
               |     |  `-- †Cophocetus
               |     `--+-- †Aglaocetus
               |        `-- †Diorocetus
               `--o †Cetotheriidae
                  |-- †Joumocetus
                  `--+-- †Cetotherium
                     `-- †Piscobalaena

Reference(s):

  • Kimura, T. & Hasegawa, Y., 2010: A New Baleen Whale (Mysticeti: Cetotheriidae) from the Earliest Late Miocene of Japan and a Reconsideration of the Phylogeny of Cetotheres.
    –Journal of Vertebrate Paleontology: Vol. 30, #2, pp. 577-591 [doi: 10.1080/02724631003621912]

After Fitzgerald, 2010

<==o Mysticeti
   |--+--o  †Llanocetidae
   |  |  `-- †Llanocetus denticrenatus
   |  `--o †Mammalodontidae
   |     |-- †Janjucetus hunderi
   |     `-- †Mammalodon colliveri
   `--+--o †Aetiocetidae
      |  |--o †Chonecetus
      |  |  |-- †C. goedertorum
      |  |  `-- †C. sookensis
      |  `--o †Aetiocetus
      |     |-- †A. polydentatus
      |     `--+-- †A. weltoni
      |        `-- †A. cotylalveus
      `--o Chaeomysticeti
         |-- †Eomysticetus whitmorei
         `--+-- †Micromysticerus rothauseni
            `--+-- †Diorocetus hiatus
               `--+-- †Pelocetus calvertensis
                  `--+-- Balaenidae
                     `-- Balaenopteridae

Reference(s):

  • Fitzgerald, E. M. G., 2010: The morphology and systematics of Mammalodon colliveri (Cetacea: Mysticeti), a toothed mysticete from the Oligocene of Australia.
    –Zoological Journal of the Linnean Society: Vol. 158, #2, pp. 367-476 [doi: 10.1111/j.1096-3642.2009.00572.x]

After Deméré, McGowen, Berta & Gatesy, 2008

<==o Mysticeti
   |--o †Janjucetidae
   |  `-- †Janjucetus hunderi
   `--+--o †Mammalodontidae
      |  `-- †Mammalodon colliveri
      `--+--o †Aetiocetidae
         |  |-- †Chonecetus goedertorum
         |  |-- †Aetiocetus cotylalveus
         |  |-- †Aetiocetus weltoni
         |  `-- †Aetiocetus polydentatus
         `--+-- †Eomysticetus whitmorei
            `--+--o †“Cetotheriidae”
               |  |--+-- †Parietobalaena palmeri
               |  |  `--+-- †Diorocetus hiatus
               |  |     `-- †Aglaocetus patulus
               |  `--+-- †Isanacetus laticephalus
               |     `--+--+-- †Pelocetus calvertensis
               |        |  `-- †Cophocetus oregonensis
               |        `--+-- †Mixocetus elysius
               |           `-- †Cetotherium rathkii
               `--+--o Balaenidae
                  |  |-- Balaena
                  |  `-- Eubalaena
                  `--+--o Neobalaenidae
                     |  `-- Caperea marginata
                     `--+--o Eschrichtiidae
                        |  |-- SDSNH 90517
                        |  `-- Eschrichtius robustus
                        `-- Balaenopteridae

Reference(s):

  • Deméré, T. A., McGowen, M. R., Berta, A. & Gatesy, J., 2008: Morphological and molecular evidence for a stepwise evolutionary transition from teeth to baleen in mysticete whales.
    –Systematic Biology: Vol. 57, #1, pp. 15-37 [doi: 10.1080/10635150701884632]

After Steeman, 2007

<==o Mysticeti
   |--o †Aetiocetidae
   |  |-- †Aetiocetus cotylalveus
   |  `-- †Chonecetus goedertorum
   `--+--o †Llanocetidae
      |  `-- †Llanocetus denticrenatus
      `--+--o †Eomysticetoidea
         |  |-- †“Mauicetus” lophocephalus
         |  |-- †“Mauicetus” waitakiensis
         |  |--o †Eomysticetidae
         |  |  `-- †Eomysticetus whitmorei
         |  `--o †Cetotheriopsidae
         |     |-- †Cetotheriopsis
         |     `-- †Micromysticetus
         `--o Balaenoidea
            |--o Balaenidae
            |  |--o Neobalaenidae
            |  |  `-- Caperea marginalis (sic)
            |  `--o Balaenidae
            |     |?- †Morenocetus
            |     |-- Eubalaena glacialis
            |     `-- Balaena mysticetus
            `--+--o Cetotheroidea
               |  |?- †Mixocetus
               |  |--+-- †“Mesocetus” argillarius [Trenatocetus]
               |  |  `-- †“Cetotherium” megalophysum
               |  `--+--o Eschrichtiidae
               |     |  `-- Eschrichtius robustus
               |     `--o †“Cetotheriidae”
               |        |?- ?†Cephalotropis
               |        |?- †Herpetocetus
               |        |?- †Nannocetus
               |        |-- †Piscobalaena nana
               |        `--+-- †Cetotherium rathkei
               |           `--+-- †Metopocetus durinasus
               |              `-- USNM 182962
               `--o Balaenopteroidea
                  |--+-- ZMT 67
                  |  `-- †Mauicetus parki
                  `--+--o †Pelocetidae Steeman, 2007
                     |  |-- †Parietobalaena palmeri
                     |  `--+-- †Pelocetus calvertensis
                     |     |-- †Halicetus ignotus
                     |     `-- †Cophocetus oregonensis
                     |--o †Aglaocetidae
                     |  |-- †Pinocetus
                     |  |-- †Aglaocetus patulus
                     |  `-- †Isanacetus laticephalus
                     `--+--o †Diorocetidae
                        |  |?- †Amphicetus
                        |  |?- †Plesiocetus
                        |  |-- MSM 813 [Uranocetus]
                        |  `--+-- †Diorocetus hiatus
                        |     `-- †Thinocetus arthritus
                        `--o Balaenopteridae
                           |-- Megaptera novaeangliae
                           `--o Balaenoptera
                              |-- B. musculus
                              `-- B. acutorostrata

Reference(s):

  • Steeman, M. E., 2007: Cladistic analysis and a revised classification of fossil and recent mysticetes.
    –Zoological Journal of the Linnean Society: Vol. 150, #4, pp. 875-894 [doi: 10.1111/j.1096-3642.2007.00313.x]

After Bouetel & de Muizon, 2006

<==o Mysticeti
   |-- †Aetiocetus cotylalveus
   `--+-- †Eomysticetus whitmorei
      |--o †Cetotheriidae
      |  |-- †Mixocetus elysius
      |  `--+-- †Nannocetus eremus
      |     `--+-- †Cetotherium rathkii
      |        `--+-- †Metopocetus durinasus
      |           `--+-- †Herpetocetus scaldiensis
      |              `-- †Piscobalaena nana
      `--+-- †Diorocetus hiatus
         `--+-- †Pelocetus calvertensis
            `--+--+-- †Cophocetus oregonensis
               |  `-- †Parietobalaena palmeri
               `--+-- †Aglaocetus patulus
                  `--+--o Balaenopteridae
                     |  |-- Megaptera novaeangliae
                     |  `--o Balaenoptera
                     |     |-- B. acutorostrata
                     |     `-- B. physalus
                     `--+-- Eschrichtius robustus
                        `--o Balaenidae
                           |-- Caperea marginata
                           `--+-- Balaena mysticetus
                              `-- Eubalaena glacialis
               

Reference(s):

  • Bouetel, V. & de Muizon, C., 2006: The anatomy and relationships of Piscobalaena nana (Cetacea, Mysticeti), a Cetotheriidae s.s. from the early Pliocene of Peru.
    –Geodiversitas: Vol. 28, #2, pp. 319-395

After Dooley, Fraser & Luo, 2004

<==o Mysticeti
   |--o Balaenidae
   |  `-- Eubalaena
   `--+--+-- †Herpetocetus
      |  `-- †Parietobalaena
      `--+-- †Pelocetus
         `--+-- †Isenacetus
            `--+-- à“Megaptera” miocaena
               |-- †Parabalaenoptera
               |-- †Eobalaenoptera
               |-- Eschrichtius
               `--+-- Megaptera
                  `-- Balaenoptera
               

Reference(s):

  • Dooley, Jr., A. C., Fraser, N. C. & Luo, Z.-X., 2004: The earliest known member of the rorqual–gray whale clade (Mammalia, Cetacea).
    –Journal of Vertebrate Paleontology: Vol. 24, #2, pp. 453-463

After Kimura & Ozawa, 2002

<==o Mysticeti
   |--+-- †Aetiocetus cotylalveus
   |  `-- †Chonecetus goedertorum
   `--+--o Balaenidae
      |  `-- Eubalaena
      `==o †Cetotheriidae
         |--+-- †Cetotherium rathkii
         |  `-- †Mixocetus elysius
         `--+-- †Isenacetus laticephalus
            |-- †Pelocetus calvertensis
            |--+-- †Diorocetus hiatus
            |  `-- †Parietobalaena palmeri
            `--+-- †Cophocetus oregonensis
               |-- †Aglaocetus patulus
               `--+-- Eschrichtius robustus
                  `-- Balaenoptera physalus
               

Reference(s):

  • Kimura, T. & Ozawa, T., 2002: A new cetothere (Cetacea: Mysticeti) from the Early Miocene of Japan.
    –Journal of Vertebrate Paleontology: Vol. 22, #3, pp. 684-702

Reference(s):