Phylum [Vertebrata] (Lamarck, 1801)
Count: -
   Class Reptilia Linnaeus, 1758 - reptiles
  Count: 4o6f1g; †20o115f227g
     Subclass Diapsida Osborn, 1903 - diapsids see Clade Diapsida Osborn 1903 [Gauthier & de Queiroz 2020]
    Count: -
       Order †Ichthyosauria Blainville, 1835
      Count: -
         Family †Ichthyosauridae Bonaparte, 1841
        Count: [*] †2g
           Genus †Ichthyosaurus [König], 1818
          Count: -
           Genus †Ophthalmosaurus Seeley, 1874
          Count: -