After Carroll, 1988, and Sullivan & Augé, 2006

Placosaurus Gervais, 1948-52
        †HelodermoidesLoricotheriumNecrodasypusPlacotheriumProiguanaProtrachysaurusHelodermoides Douglass, 1903 (in partim)

        †Placosaurus rugosus Gervais, 1948-52

        †Placosaurus estesi Sullivan & Augé, 2006

        †Placosaurus mongoliensis (Sullivan, 1979)
            †Glyptosaurus near nodosus Gilmore, 1943
            †Placosaurus cf. nodosus Chow, 1957
            †Helodermoides mongoliensis Sullivan, 1979
            †Placosaurus mongoliensis (Sullivan, 1979); Sullivam & Augé, 2006

        †Placosaurus? europaeus (Fihol, 1876)
            †Proiguana europeana Fihol, 1876
            †Iguana europeana Filhol, 1877
            †Iguana europeana Lydekker, 1888
            †“Placosaurus” europaeus (Fihol) Sullivan & Augé, 2006

        †Placosaurus cayluxi (nomen dubium)

        †Placosaurus galliae (nomen dubium)

        †Placosaurus waltheri (nomen dubium)

        †Placosaurus margariticeps (Gervais, 1876) (nomen dubium, type lost)
            †Varanus? margariticeps Gervais, 1876
            †Placosaurus margariticeps; Lydekker, 1888
            †Placosaurus margaritaceps; Gervais (lapsus calami)
                [= Palaeovaranus cayluxi Filhol; De Stefano, 1903]
            †Placosaurus margariticeps (Gervais, 1876); Sullivan & Augé, 2006 (nomen dubium, type lost)

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