Subclass *Ichtlity()pterygia Owen 1860 *rclitliyoi)terygia 



Order *Mesosauria Cope 1886 *Mesosaurida 



Order *Ichthyosauria Blaiiiville 1835 *Ichthyosaurida 



Subclass *Synaptosauria Williston 1912 *Synapti)sauria 



Order *Proterosauria Seeley 1871 *Proterosaurida 



Order *Sauropterygia Owen 1859 *Sauropterygida 



Suborder *Trachelosauria Broili 1917 *Trachelosaurina 



Suborder *Tanysitrachelia Preyer 1931 *Tanysitraclielina 



Suborder *Notbosauria Deecke 1886 *Nothosaurina 



Suborder *Plesiosauria Andrews 1895 *Plesiosaurina 



Suborder *Placodontia Meyer 1863 *Placodontina 



Subclass Lepidosauria Zittel 1890 Lepidosauria 



Order *Eusuchia Huxley 1875 *Eusucliida 



Order Rhynchocephalia Gunther 1886 Rhynchocephalida 



Order Eosuchia Broom 1714 Eosuchida 



Order Squamata Oppel 181 1 , Squamatida 



Suborder Lacertilia Cuvier 1834 Lacertilina 



Suborder Ophidia Brongriart 1799 Ophidida 



Subclass *Archosauria Cope 1891 *Archosauria 



Order *Thecodontia Owen 1860 *Thecodontida 



Suborder *Pseudosuchia Cope 1891 *Pseudosuchina 



Suborder *Phytosauria Lydekker 1888 *Phytosaurina 



Order Crocodilia Wagler 1830 Crocodilida 



Suborder *Protosuchia Mook 1934 *Protosuchina 



Suborder Mesosuchia Mook 1934 Mesosuchina 



Suborder Eusuchia Mook 1934 Eusuchina 



Suborder Thallatosuchia Mook 1934 Thallatosuchina 



Order *Pterosauria Kaup 1834 *Pterosaurida 



Suborder *Rhamphorhynchoidii Abel 1919 *Rhamphorhynchina 



Suborder *Pterodactyloidea Seeley 1866 *Pterodactyliiia 



Order *Saurischia Seeley 1888 *Saurischida 



Suborder *Theropoda Marsh 1881 *Theropodina 



Suborder *Sauropoda Marsh 1878 *Sauropodina 



Order *Ornithischia Seeley 1888 *Ornithiscbida 



Suborder *Ornithopoda Cope 1869 *Ornithopodina 



Suborder *Stegosauria Cope 1880 *Stegosaurina 



Suborder *Ankylosauria Brown 1908 *Ankylosaurina 



Suborder *Ceratopsia Zittel 1890 *Ceratopsina 



Subclass *Synapsida Osborn 1903 *Synapsidia 



Order *Pelycosauria Cope 1878 *Pelycosaurida 



Order *Therapsida Broom 1905 *Therapsida 



Suborder *Anningiamorpha Broom 1927 *Anningiamorphina 



Suborder *Dromaesauria Matthew & Brown 



1922 *Dromaesaunna 



Suborder *Dinocephalia Broom 1914 *Dinocephalina 



Suborder *Dicynodontia Owen 1859 *Dicynodontina 



Suborder *Theriodontia Owen 1876 *Thenodontina 



Suborder *Ictidosauria Broom 1912 *Ictidosaurina 



Suborder *Protodonta Osborn 1887 *Protodontina 



[21] 



