Reptilia (matelijat; reptiles)

    Anapsida (ohimoaukottomat matelijat)
        †MesosauriaMillerosauria
        †"Bolosauria"
        ProcolophonomorphaNyctiphruretiaProcolophonidaPareiasauria
            Testudinata [Chelonia, Testudines] (kilpikonnat; turtles)
    EureptiliaCaptorhinida
        DIAPSIDA (kaksiohimoaukkoiset matelijat)
            †Araeoscelida Williston, 1913
            NeodiapsidaEosuchia"Ichthyosauromorpha" (kalaliskot; ichthyosaurs, fishlizards)
                    ?†Hupehsuchia
                    IchthyopterygiaGrippidia Wiman, 1929
                        †Ichthyosauria Blainville, 1835
                SauriaThalattosauriformes sensu Nicholls, 1999
                    Lepidosauromorpha Gauthier, Estes & deQueiroz, 1988
                        †Sauropterygia (joutsenliskomaiset merimatelijat)
                            †Placodontia (placodonts; plakodontit)
                            †Nothosauria (nothosaurs; notosaurit) [paraphyletic]
                            †Plesiosauria (plesiosaurs; joutsenliskot)
                        Lepidosauriformes (lepidosaurit; lepidosaurs)
                            †Eolacertilia (paraphyletic?)
                            Lepidosauria
                                Rynchocephalia [Sphenodontida] (alkuliskot, tuatarat; sphenodonts, tuataras)
                                Squamata (suomumatelijat; snakes & lizards)
                                    Lacertilia (lizards; liskot) [paraphyletic]
                                    Serpentes (snakes; käärmeet)
                    ArchosauromorphaTrilophosauriaRhynchosauriaProtorosauria [Prolacertiformes]
                        †Choristodera
                        Archosauriformes (arkosaurimaiset matelijat)
                            Archosauria (arkosaurit; non-avian archosaurs)
                                Aves (linnut; birds)
                                    Neornithes (nykylinnut; modern birds)

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