After Bell, 1994 and Caldwell, 2000

<==o †Mosasauroidea sensu Bell, 1994 and Caldwell, 2000 (meriliskot)
   |?- †Haasiasaurus gittelmani Polcyn, Tchernov & Jacobs, 2003 [Haasia Polcyn, Tchernov & Jacobs, 1999; non Haasia Bollman, 1893 (Myriapoda) nor Haasia Yuan, 1988 (Trilobita)]
   |?- †Carentonosaurus mineaui Rage & Néraudeau, 2004; U.Cret. WEu.
   |--o †Dolichosauridae Gervais, 1852 (Small Sea Lizards; "pienmeriliskot")
   |  |?- †Eidolosaurus
   |  `--+-- †Pontosaurus lesinensis Kornhuber, 1873 [Hydrosaurus]
   |     `--+-- †Acteosaurus [Adriosaurus]
   |        `-- †Dolichosaurus longicollis Owen, 1850
   `--+--o †Coniasaurus Owen, 1850 [Coniosaurus (Owen, 1850) Owen, 1851, unjustified emendation (Liggett, 2004)]
      |  |-- †C. crassidens Owen, 1850
      |  `-- †C. gracilodens Galdwell, 1999
      `--+-- †Mosasauridae Gervais, 1853 (Large Sea Lizards; "suurmeriliskot")
         `--o †Aigialosauridae Kramberger, 1892 (Old Sea Lizards; "vanhameriliskot") [possibly paraphyletic grade of primitive Mosasaurid?]
            |--o †Aigialosaurus Kramberger, 1892
            |  |-- †A. dalmaticus Kramberger, 1892
            |  `-- †A. bucchichi (Kornhuber, 1901) [Opetiosaurus bucchichi Kornhuber, 1901; Aigialosaurus novaki Kramberger, 1892]
            |-- †Carsosaurus marchesetti Kornhuber, 1893
            |?- †Proaigialosaurus huenei Kuhn, 1958 [nomen dubium, specimen lost]
            |-- †Aigialosauridae genera et species indet. [Trieste specimen]
            |-- †Aigialosauridae genera et species indet. [Dallas specimen]
            `-- †Aigialosauridae genera et species indet. [Yale specimen]

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