After Erickson, 1987, Cvancara & Hoganson, 1993, and Gao & Fox, 1998, 2005
<==o †Choristodera Cope, 1884 (non Cope, 1876) (champsosaurs; champsosaurit) |?- †Choristodera genera et species indet. [Averianov, Martin, Evans & Bakirov, 2005] [M.Jur. CA.] |?- †Irenosaurus egloni (Efimov, 1983) [Tchoiria egloni Efimov, 1983, Irenosaurus Efimov, 1988] |?-o †Khurendukhosaurus Sigogneau-Russell & Efimov, 1984 | |-- †K. bajkalensis Efimov, 1996 | `-- †K. orlovi Sigogneau-Russell & Efimov, 1984 |?-o †Lazarussuchus Hecht, 1992; U.Olig.-L.Mioc. Eu. [Lazarussaurus (lapsus calami)] [non-Choristodere sensu Gao & Fox, 2005] | |-- †L. inexpectatus Hecht, 1992 | `-- †L. dvoraci Evans & Klembara, 2005 `--+--o †Cteniogelys Gilmore, 1928; M.-U.Jur. NA. [Cteniogenidae Seiffert, 1973] | |-- †C. sp., cf. C. antiquus | `-- †C. antiquus Gilmore, 1928 `--+-- †Pachystropheus rhaeticus Huene, 1935; U.Trias. |--o †Monjurosuchidae Endo, 1940 | |-- †Philydrosaurus proseilus Gao & Fox, 2005; L.Cret. EAs. | `-- †Monjurosuchus splendens Endo, 1940; L.Cret. EAs. |--o †Hyphalosauridae Gao & Fox, 2005 | |-- †Shokawa ikoi Evans & Manabe, 1999 | `--o †Hyphalosaurus Gao, Tang & Wang, 1999 [Sinohydrosaurus Li, Zhang & Li, 1999] L.Cret. EAs. | |-- †H. lingyuanensis Gao, Tang & Wang, 1999 [Sinohydrosaurus lingyuanensis Li, Zhang & Li, 1999] | `-- †H. baitaigouensis Q. Ji, S. Ji, Cheng, You, Lü & Yuan, 2004 `--o †Neochoristodera Evans & Hecht, 1993 [Champsosauriformes Hay, 1929 (nomen oblitum)] |--o †Simoedosauridae Lemoine, 1884 | |-- †Tchoiria namsarai Efimov, 1975 | `--+--o †Ikechosaurus Sigogneau-Russell, 1981 | | |-- †I. sunailinae Sigogneau-Russell, 1981 | | |-- †I. magnus (Efimov, 1979) [Tchoiria magnus Efimov, 1979] | | `-- †I. pijiagouensis Liu, 2004 | `--o †Simoedosaurus Gervais, 1877 | |-- †S. lemoinei Gervais, 1877 | |-- †S. sp. [UALVP 33927] | `-- †S. dakodensis Erickson, 1987 `--o †Champsosauridae Cope, 1884 (champsosaurit) |-- †Eotomistoma multidentata Young, 1964 `--o †Champsosaurus Cope, 1876 |-- †C. profundus Cope, 1876 |-- †C. annectens Cope, 1876 |?- †C. breficollis |?- †C. dolloi |-- †C. lindoei Gao & Fox, 1998 |-- †C. natator Parks, 1933 |-- †C. albertensis Parks, 1927 |-- †C. gigas Erickson, 1972 |-- †C. laramiensis [incl. C. australis Cope, 1884; C. puercensis Cope, 1884; C. saponensis Cope, 1884] |-- †C. ambulator |-- †C. tenius |-- †C. dakotensis `-- †C. sp. [TMM 45818] [Pal. SWNAn.] [Lehman " Barnes, 2010]
Reference(s):
- Averianov, A. O., Martin, T., Evans, S. E. & Bakirov, A. A., 2005: First Jurassic Choristodera from Asia.
–Naturwissenschaften: advance online publication, pp. 1-5 - Cvancara, A. M. & Hoganson, J. W., 1993: Vertebrates of the Cannonball Formation (Paleocene) in North and South Dakota.
–Journal of Vertebrate Paleontology: Vol. 13, #1, pp. 1-23 - Efimov, M. B. & Storrs, G. W., 2000: Choristodera from the Lower Cretaceous of northern Asia. 390-401
in Benton, M. J., Shishkin, M. A., Unvin, D. M. & Kurochkin, E. N., (eds.) 2000: The Age of Dinosaurs in Russia and Mongolia.
–Cambridge University Press, Cambridge, 2000 xxxix-696 - Erickson, B. R., 1987: Simoedosaurus dakotensis, new species, a diapsid reptile (Archosauromorpha; Choristodera) from the Paleocene of North America.
–Journal of Vertebrate Paleontology: Vol. 7, #3, pp. 237-251 - Evans, S. E. & Klembara, J., 2005: A choristoderan reptile (Reptilia: Diapsida) from the Lower Miocene of northwest Bohemia (Czech Republic).
–Journal of Vertebrate Paleontology: Vol. 25, #1, pp. 171-184 - Gao, K., Evans, S., Ji, Q., Norell, M. A. & Ji, S.-A., 2000: Exceptional fossil material of a semi-aquatic reptile from China: The resolution of enigma.
–Journal of Vertebrate Paleontology: Vol. 20, #3, pp. 417-421 - Gao, K. & Fox, R. C., 1998: New choristoderes (Reptilia: Diapsida) from the Upper Cretaceous and Palaeocene, Alberta and Saskatchewan, Canada, and phylogenetic relationships of Choristodera.
–Zoological Journal of the Linnean Society: Vol. 124, #4, pp. 303-353 [doi: 10.1111/j.1096-3642.1998.tb00580.x] - Gao, K.-Q. & Fox, R. C., 2005: A new choristodere (Reptilia: Diapsida) from the Lower Cretaceous of western Liaoning Province, China, and phylogenetic relationships of Monjurosuchidae.
–Zoological Journal of the Linnean Society: Vol. 145, pp. 427-444 - Ji, Q., Ji, S., Cheng, Y., You, H., Lü, J. & Yuan, C., 2004: The first fossil soft-shell eggs with embryos from Late Mesozoic Jehol Biota of western Liaoning, China.
–Acta Geoscientia Sinica: Vol. 25, pp. 275-285 [from a correpondence in Dinosaur Mailing List] - Lehman, T. M. & Barnes, K., 2010: Champsosaurus (Diapsida: Choristodera) from the Paleocene of West Texas: paleoclimatic implications.
–Journal of Paleontology: Vol. 84, #2, pp. 341-345 - Liu, J., 2004: A nearly complete skeleton of Ikechosaurus pijiagouensis sp. nov. (Reptilia: Choristodera) from the Jiufotang Formation (Lower Cretaceous) of Liaoning, China.
–Vertebrata PalAsiatica: Vol. 42, #2, pp. 120-129