After

Saniwa Leidy, 1870
        Thinosaurus Marsh, 1872
        Saniva [sic] Leidy, 1873 (lapsus calami)

        †Saniwa ensidens Leidy, 1870
            Thinosaurus paucidens Marsh, 1872
            Thinosaurus leptodus Marsh, 1872
            Thinosaurus crassus Marsh, 1872
            Thinosaurus grandis Marsh, 1872
            Thinosaurus agilis Marsh 1872
            Saniva [sic] ensidens Leidy, 1872 (lapsus calami)
            Sanvia [sic] major Leidy, 1873 (lapsus calami)
            Saniwa ensidens Leidy; Gilmore, 1922
            Saniwa leptodus (Marsh); Gilmore, 1922
            Saniwa brooksi Brattstrom 1955
            Saniwa ensidens Leidy; Estes, 1983
            Saniwa paucidens (Marsh); Estes, 1983
            Saniwa crassus (Marsh); Estes, 1983
            Saniwa grandis (Marsh); Estes, 1983
            Saniwa agilis (Marsh); Estes, 1983

        †Saniwa orsmaelensis Dollo, 1923
            Saniwa orsmaelensis Dollo; Hecht & Hoffstetter, 1962 (nomen nudum)
            Saniwa orsmaelensis Dollo; Estes, 1983

        †Saniwa edura Smith, 2006

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