After Carroll, 1988, Williams, 1999-2000, Ginter, 2002, and Ginter, Ivanov & Lebedev, 2005

<==o Ctenacanthiformes Zangerl, 1981 [Ctenacanthoidea] [paraphyletic]
   |?- †Ctenacanthoidea genera et species indet. [L. Carb. EAs.] [Wang, Jin & Wang, 2004]
   |?- †Acronemus tuberculatus (Bassanii, 1886) M. Trias. Eu.
   |?- †Carinacanthus jepseni Bryant, 1934 [Hybodus] [Cladoselachid after Williams, 2000]
   |?-o †Glikmanius Ginter, Ivanov & Lebedev, 2005 [taxonomic history]
   |  |-- †G. occidentalis (Leidy, 1859) [taxonomic history]
   |  `-- †G. myachkovensis (Lebedev, 2001) [taxonomic history]
   |?- †Heslerodus divergens (Trautschold, 1879) Ginter, 2002 [Cladodus divergens Trautschold, 1879, Phoebodus heslerorum (M.E.?) Williams, 1985]
   |?- †Heteropetalus elongatulus
   |--o †Bandringa Zangerl, 1969, Penn. NA. [Bandringidae]
   |  |-- †B. herdinae Zangerl, 1970
   |  `-- †B. rayi Zangerl, 1969
   |-- †Phoebodontidae Williams, in Zangerl, 1981
   |-- †Ctenacanthidae Dean, 1909
   `--+-- †Tristychius arcuatus Agassiz, 1837, Miss. Eu. [a ctenacanthiform??]
      `--+-- †Hopleacanthus richelsdorfensis Perm. Eu.
         `--+-- †Onychoselache traquairi Dick, 1978, Miss. Eu. 
            `--+== †Hybodontiformes [paraphyletic]
               `-- Neoselachii (uushait; modern sharks & rays)

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