After Young et al., 2012, with some information from “Paleofile.com” (2005)

Plesiosuchus Owen, 1884
        Steneosaurus Hulke, 1870

        †Plesiosuchus mansellii (Hulke, 1870)
            Pliosaurus trochanterius (Owen); Owen, 1869
            Metriorhynchus (von Meyer); Eudes-Deslongchamps, 1867-69
            Steneosaurus rostro-minor (Geoffroy Saint-Hilaire); Hulke, 1869
            Steneosaurus mansellii Hulke, 1870
            Plesiosaurus mansellii (Hulke); Owen, 1884
            Plesiosaurus mansellii (Hulke); Owen, 1849-84
            Metriorhynchus sp. (von Meyer); Woodward, 1885
            Dakosaurus mansellii (Hulke); Woodward, 1885
            Dacosaurus maximus (Plieninger); Lydekker, 1888 (sic)
            Machimosaurus mosae (Sauvage & Lienard); Lydekker, 1888
            Machimosaurus mosae (Sauvage & Lienard); Lydekker, 1890
            Dacosaurus Mansellii (Hulke); Fraas, 1902
            Dakosaurus mansellii (Hulke); Steel, 1973
            Colymbosaurus trochanterius (Owen) Benton & Spencer, 1995
            Dakosaurus manseli (sic) (Hulke); Grange & Benton, 1996
            Dakosaurus mansellii (Hulke); Young & Andrade, 2009
            Dakosaurus mansellii (Hulke); Young et al., 2010
            Plesiosuchus mansellii Young et al., 2012

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