After Carroll, 1988, Karatajute-Talimaa & Märss, 2002a,b, and Hairapetian, Blom & Miller, 2008

<==o †Thelodonti Kiaer, 1932 [Thelodontomorphi Jaekel, 1911]
   |?- †Lepidaspis
   |--o †Apalolepididae
   |  |-- †Apalolepis
   |  `-- †Skamolepis
   |--o †Katoporida Gross, 1967 [=? Phlebolepidiformes Berg, 1937; Loganelliiformes Turner, 1991]
   |  |--o †Loganelliidae Märss, Wilson & Thorsteinsson, 2002 [non Loganellidae Karatajute-Talimaa, 1997??]
   |  |  |-- †Angaralepis Karatajute-Talimaa, 1997
   |  |  |-- †Stroinolepis maenniki Karatajute-Talimaa & Märss, 2002a
   |  |  |--o †Sandivia Karatajute-Talimaa, 1997
   |  |  |  |-- †S. melnikovi Karatajute-Talimaa, 1997
   |  |  |  `-- †S. augusta Karatajute-Talimaa, 1997
   |  |  |-- †Valiukia fabellataKaratajute-Talimaa & Märss, 2002b
   |  |  |-- †Valyalepis Turner in Turner & Nowlan, 1995
   |  |  `--o †Loganellia Fredholm, 1990 [non Turner, 1991]
   |  |     |-- †L.? kadvoiensis
   |  |     |-- †L. matura Karatajute-Talimaa & Märss, 2002a
   |  |     |-- †L. grossi Fredholm, 1990
   |  |     |-- †L. cuneata (Gross, 1947)
   |  |     |-- †L. einari Märss, 1996
   |  |     `--+-- †L. scotica (Traquair, 1898) [Logania scotica Traquair, 1898]
   |  |        `-- †L. siberica
   |  |--o †Phlebolepididae
   |  |  |-- †Erepsilepis Märss, Wilson & Thorsteinsson, 2002
   |  |  |-- †Helenolepis Karatajute-Talimaa, 1978
   |  |  `--o †Phlebolepis Pander, 1856 [Coelolepis]
   |  |     |-- †P. sp. [U. Sil., Arctic Canada] [Thorsteinsson, 1967] [from Märss, 1986]
   |  |     |-- †P. ornata Märss, 1986
   |  |     `-- †P. elegans Pander, 1856 [Coelolepis luhai Hoppe, 1934]
   |  |--o †Shieliidae [Loganellidae in partim]
   |  |  |--o †Shielia Märss in Märss & Ritchie, 1998
   |  |  |  |-- †S. taiti (Stetson, 1931) [Loganellia taiti (Stetson, 1931)]
   |  |  |  `-- †S. multispinata Karatajute-Talimaa & Märss, 2002a
   |  |  |--o †Paralogania Karatajute-Talimaa, 1997
   |  |  |  |-- †P. klubovi Karatajute-Talimaa & Märss, 2002a
   |  |  |  |-- †P. wilsoni Karatajute-Talimaa & Märss, 2002b
   |  |  |  |-- †P. borealis Karatajute-Talimaa, 1978
   |  |  |  `--+--+-- †P. martinssoni (Gross, 1967) [Logania martinssoni Gross, 1967]
   |  |  |     |  |-- †P. ex gr. martinssoni (Gross, 1967)
   |  |  |     |  |-- †P. kachanovi Karatajute-Talimaa & Märss, 2002b
   |  |  |     |  |-- †P. kummerowi (Gross, 1967)
   |  |  |     |  `-- †P. menneri Karatajute-Talimaa & Märss, 2002b
   |  |  |     `--+-- †P. consimilis Karatajute-Talimaa & Märss, 2002a
   |  |  |        `-- †P. ludlowiensis (Gross, 1967)
   |  |  `== other shieliid genera?
   |  `--o †Katoporodidae Märss, Wilson & Thorsteinsson, 2000 [incl. Katoporidae Karatajüte-Talimaa, 1970; Katoporodontidae (lapsus calami?)]
   |     |--o †Goniporus Gross, 1967
   |     |  `-- †G. alatus (Gross, 1947)
   |     |-- †Niurolepis susanae L.Sil. SAs.
   |     |--o †Helenolepis Karatajüte-Talimaa, 1978
   |     |  |-- †H. multicostata Karatajüte-Talimaa, 1978
   |     |  |-- †H. navicularis Karatajüte-Talimaa, 1978
   |     |  `-- †H. obruchevi
   |     |--o †Katoporodus Turner & Pell, 1986
   |     |  |-- †K. lithuanicus Karatajüte-Talimaa, in Obruchev & Karatajüte-Talimaa, 1967
   |     |  |-- †K. sp. cf. K. lithuanicus Karatajüte-Talimaa, in Obruchev & Karatajüte-Talimaa, 1967
   |     |  `-- †K. timanicus Karatajüte-Talimaa
   |     |-- †Katoporus
   |     |-- †Overia adriani Märss, 2001 in Soehn, Märss, Caldwell & Wilson, 2001 [Loganellia sp. nov. Märss et al., 1998; Loganellia sp. nov. Soehn et al., 2000]
   |     `-- †Zuegelepis potanus Turner, 1999
   `--o †Thelodontida Kiaer, 1932 non Stensiö, 1958 [Thelodontiformes; Coelolepidiformes Berg, 1937]
      |?-o †Boothialepididae Märss, 1999
      |  |?- †“Turinia” pagoda Wang, Dong & Turner, 1986 sensu Märss, 1999
      |  `-- †Boothialepis thorsteinssoni Märss, 1999
      |--o †Turiniidae Obruchev, 1964
      |  |-- †Boreania minima Karatajute-Talimaa, 1985
      |  `--o †Turinia Traquair, 1896
      |     |-- †T. pagei (Powrie, 1870) [type]
      |     |-- †T. antarctica Turner & Young, 1992
      |     |-- †T. barentsia Blom & Goujet, 2002
      |     |-- †T. composita Karatajute-Talimaa, 2002
      |     |-- †T. hutkensis Blieck & Goujet, 1977
      |     |-- †T. polita Karatajute-Talimaa, 1978
      |     |-- †T. fuscina Turner, 1986
      |     `-- †T. gondwana Turner, in Gagnier et al., 1988
      |--o †Archipelepididae Märss, 2001 in Soehn, Märss, Caldwell & Wilson, 2001
      |  |?- †“Thelodus” hoskinsi (Giffin, 1979) Soehn, Märss, Caldwell & Wilson, 2001
      |  `-- †Archipelepis turbinata Märss, 2001 in Soehn, Märss, Caldwell & Wilson, 2001
      |--o †Nikoliviidae Karatajute-Talimaa, 1978
      |  |-- †Amaltheolepis
      |  |-- †Chattertonodus Märss, Wilson & Thorsteinsson, 2002
      |  |-- †Gompsolepis
      |  `--o †Nikolivia Karatajute-Talimaa, 1978
      |     |-- †N. aligera Karatajute-Talimaa, 2002
      |     |-- †N. oervigi (Karatajute-Talimaa, in Obruchev & Karatajute-Talimaa, 1967)
      |     `-- †N. elongata Karatajute-Talimaa, 1978
      |--o Thelodontidae Jordan, 1905
      |  `--o †Thelodus Agassiz, 1839 [Thelolepis, Thelolepoides, Thelyodus]
      |     |-- †T. admirabilis Märss, 1982
      |     |-- †T. calvus Karatajute-Talimaa & Märss, 2002a
      |     |-- †T. costatus
      |     |-- †T. laevis (Pander, 1856)
      |     |-- †T. matukhini Karatajute-Talimaa & Märss, 2002b
      |     |-- †T. parvidens Agassiz, 1839
      |     |--+-- †T. schmidti (Pander, 1856)
      |     |  |-- †T. ex gr. schmidti (Pander, 1856)
      |     |  |-- †T. marginatus Karatajute-Talimaa, 1978
      |     |  `-- †T. carinatus (Pander, 1856)
      |     |-- †T. scoticus
      |     |-- †T. sculptilis Gross, 1967
      |     |-- †T. trilobatus Hoppe, 1931
      |     `-- †T. visvaldi Karatajute-Talimaa & Märss, 2002b
      |--o †Lanarkiidae Obruchev, 1949
      |  `--o †Lanarkia Traquair, 1898
      |     |-- L. horrida
      |     `-- L. spinosa Traquair, 1898
      `--o †Coelolepididae Pander, 1856 [Loganiidae Karatajute-Talimaa, 1978]
         |-- †Coelolepis
         |-- †Larolepis darbyi Sansom & Elliott, 2002
         |--o †Logania
         |  `?- †L.? cruciformis
         `-- †Sigurdia

Thelodonti incertae sedis:

Glacialepis Märss, Wilson & Thorsteinsson, 2002

Reference(s):