Phylum [Vertebrata] Lamarck, 1801 see Infraphylum Vertebrata Lamarck, 1801 Class Reptilia Linnaeus, 1758 - reptiles Subclass Anapsida Osborn, 1903 - anapsids Order †Mesosauria Seeley, 1892 Family †Mesosauridae Baur, 1889 - mesosaurs Genus †Mesosaurus Gervais, 1865