After Jeffery, 2006

    †Strepsodus Huxley, in Huxley & Etheridge, 1865
        Holoptychius; Binney, 1841
        Strepsodus Huxley, in Huxley & Etheridge, 1865
        Dendroptychius Huxley, in Huxley & Etheridge, 1865; Young, 1866
        Rhizodus; Young, 1867
        Strepsodus; Traquair, 1882
        Strepsodus; Traquair, 1890
        Onychodus; von Huene, 1943
        Strepsodus; Andrews, 1985
        Strepsodus Huxley, in Huxley & Etheridge; Jeffery, 2006

        †Strepsodus sauroides Huxley, in Huxley & Etheridge, 1865 (non Young, 1866)
            Holoptychius sauroides Binney, 1841
            Strepsodus sauroides (Binney); Huxley, in Huxley & Etheridge, 1865
            Dendroptychius sp. Huxley, in Huxley & Etheridge, 1865; Young, 1866
            Rhizodus sauroides (Binney); Young, 1867
            non Rhizodus hardingi Dawson, 1868
            non Strepsodus hardingi (Dawson); Woodward, 1891
            Onychodus sp. cf. O. ostrovensis v. Huene, 1943; Schultze, 1973
            non Streptodus sp. Janvier et al., 1984
            “large form”; Andrews, 1985
            non “large form”; Andrews, 1985
                = Archichthys portlocki (Portlock, 1843 ex Agassiz MS)
            “Cowdenbeath material”; Andrews, 1985
            “Greer rhizodontid”; Godfrey, 1989
            non ?Streptodus Janvier & Villarroel, 2000
            “Docabrook” Streptodus; Johanson et al., 2000
            “Docabrook” Streptodus; Parker et al., 2005
            Strepsodus sauroides (Binney); Jeffery, 2006
          including:
            Strepsodus striatulus Traquair, 1882
            Strepsodus minor Traquair, 1890
            Onychodus ostrovensis von Huene, 1943
            Strepsodus anculonamensis Andrews, 1985; Jeffery, 2006 (a juveline)

Nomina dubia:

        †Strepsodus arenosus Hay, 1900
        †Strepsodus brockbanki Davis, 1891
        †Strepsodus dawsoni Hay, 1900

Reference(s):