After Long, 2001, and Lu & Zhu, 2009

<==o †Onychodontida Andrews, 1973 [Onychodontiformes Andrews, 1973; Struniiformes]
   |?- †Psarolepis romeri Yu, 1998 sensu Long, 2001; L. Dev. SEAs. [problematic, see Gnathostomata for other positions]
   `--o †Onychodontidae Woodward, 1891
      |?- †Quebecius quebecensis [Quebecius quebecius] U. Dev. ENA.
      |?- †Onychodontidae indet. cf. Quebecius quebecensis [Latvia]
      |?- †Lukeus abudda Young & Schultze, 2005
      |?- †Bukkanodus jesseni Johanson, Long, Talenet, Janvier & Warren, 2007
      `--+--o †Strunius Jessen, 1966
         |  |-- †S. walteri Jessen, 1966
         |  `-- †S. rolandi (Gross, 1936)
         `--+-- †Qingmenodus yui Lu & Zhu, 2009: E.Dev. SEAs.
            `--+-- †Grossius aragonensis Schultze, 1973 [Grossipterus crassus??] M.Dev. SWEu.
               `--o †Onychodus Newberry, 1857 [Protodus]
                  |-- †O. yassensis Lindley, 2002
                  |-- †O. segmoides
                  |-- †O. jaekeli
                  `-- †O. jandemarrai Andrews, Long, Ahlberg, Barwick & Campbell, 2006

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