After Nicholls, 1999, Jiang, Maisch, Sun, Matzke & Hao, 2004, and Müller, 2005
<==o †Thalattosauriformes Merriam, 1905 sensu Nicholls, 1999 |--o †Askeptosauroidea | |-- †Endennasaurus acutirostris Renesto, 1984 [Endennasauridae] | `--o †Askeptosauridae | |-- †Askeptosaurus italicus Nopcsa, 1925 | `--o †Anshunsaurus Liu, 1999 | |-- †A. sp. Rieppel, Li & Liu | `-- †A. huangguoshuensis Liu, 1999 `--o Thalattosauria Merriam, 1905 sensu Nicholls, 1999 [?Thalattosauroidea Nopcsa, 1928 sensu Rieppel, Liu & Bucher, 2000] |--+-- †Nectosaurus halius Merriam, 1905 [Thalattosaurus shastensis Merriam, 1905 (in partim)] L.Trias. WNAm. | |?- †Concavispina biseridens Zhao, Liu, Li & He, 2013; Trias. SEAs. | `--o Xinpusaurus Yin in Yin et al., 2000; Trias. SEAs. | |-- †X. suni Yin in Yin et al., 2000; Trias. SEAs. | `-- †X. bamaolinensis Cheng, 2003 [incl. X. kohi Jiang, Maisch, Sun, Matzke & Hao, 2004] `==o †Thalattosauridae Merriam, 1905 [Thalattosaurida Nicholls, 1999] [paraphyletic] |-- †Agkistrognathus campbelli Nicholls & Brinkman, 1993 `--+-- †Paralonectes merriami Nicholls & Brinkman, 1993 `--+--o †Thalattosaurus Merriam, 1904 [Scenodon] L.Trias. WNAm. | |-- †T. alexandrae Merriam, 1904 [Thalattosaurus shastensis Merriam, 1905 (in partim); Thalattosaurus perrini Merriam, 1905] | `-- †T. borealis Nicholls & Brinkman, 1993 `--o Claraziidae |-- †Clarazia schinzi Peyer, 1936a `-- †Hescheleria ruebeli Peyer, 1936b
After Nicholls, 1999<==o †Thalattosauriformes |-- †Endennasaurus |-- †Askeptosaurus `--o †Thalattosauria |-- †Hescheleria `--o †Thalattosauroidea |-- †Nectosaurus `--o †Thalattosauridae |-- †Clarazia `--o †Thalattosaurida |-- †Thalattosaurus `--+-- †Paralonectes `-- †Agkistrognathus |
Reference(s):
- Carroll, R. L., 1988: Vertebrate paleontology and evolution.
–W. H. Freeman and company, New York, 1988, 698. - Carroll, R. L., 1988: Appendix. 594-648.
in Carroll, R. L. 1988: Vertebrate paleontology and evolution.
–W. H. Freeman and company, New York, 1988, 698 - Jiang, D.-Y., Maisch, M. W., Sun, Y.-L., Matzke, A. T. & Hao, W.-C., 2004: A new species of Xinpusaurus (Thalattosauria) from the Upper Triassic of China.
–Journal of Vertebrate Paleontology: Vol. 24, #1, pp. 80-88 - Müller, J., 2005: The anatomy of Askeptosaurus italicus from the Middle Triassic of Monte San Giorgio and the interrelationships of thalattosaurs (Reptilia, Diapsida).
–Canadian Journal of Earth Sciencies: Vol. 42, #7, pp. 1347-1367 - Müller, J., Renesto, S. & Evans, S. E., 2005: The marine diapsid reptile Endennasaurus from the Upper Triassic of Italy.
–Palaeontology: Vol. 48, #1, pp. 15-30 - Nicholls, E. L., 1999: A reexamination of Thalattosaurus and Nectosaurus and the relationships of the Thalattosauria (Reptilia: Diapsida)
–PaleoBios: Vol. 19, #1, pp. 1-29 [abstract: http://www.ucmp.berkeley.edu/museum/pbios/abstracts19_1to3.html] - Nicholls, E. L. & Brinkman, D., 1993: New Thalattosaurs (Reptilia: Diapsida) from the Triassic Sulphur Mountain Formation of Wapiti Lake, British Columbia.
–Journal of Paleontology: Vol. 67, #2, pp. 263-278 [doi: 10.2307/1305995] - Zhao, L.-J., Liu, J., Li, C. & He, T., 2013: A new thalattosaur, Concavispina biseridens gen. et sp. nov. from Guanling, Guizhou, China. [in Chinese].
–Vertebrata PalAsiatica: Vol. 51, #1, pp. 24-28 - Rieppel, O., 1997: Part II: Sauropterygia - Introduction. 107-119
in Callaway, J. M. & Nicholls, E. L., (eds.) 1997: Ancient Marine Reptiles. xivi-501
–Academic Press, San Diego, 1997 - Rieppel, O., 2000: Paraplacodus and the phylogeny of the Placodontia
(Reptilia: Sauropterygia).
–Zoological Journal of the Linnean Society: Vol. 130, #4, pp. 635-659 - Rieppel, O. & Hagdorn, H., 1997: Paleobiogeography of Middle Triassic Sauropterygia in Central and Western Europe. 121-144
in Callaway, J. M. & Nicholls, E. L., (eds.) 1997: Ancient Marine Reptiles. xivi-501
–Academic Press, San Diego, 1997 - Rieppel, O. & Liu, J., 2006: on Xinpusaurus (Reptilia: Thalattosauria).
–Journal of Vertebrate Paleontology: Vol. 26, #1, pp. 200-204 - Rieppel, O., Liu, J. & Bucher, B., 2000: The fist record of a thalattosaur reptile from the Late Triassic of Southern China (Guizhou Province, PR China)
–Journal of Vertebrate Paleontology: Vol. 20, #3, pp. 507-514 - Rieppel, O. C., Müller, J. & Liu, J., 2005: Rostral structure in Thalattosauria (Reptilia, Diapsida).
–Canadian Journal of Earth Sciencies: Vol. 42, pp. 2081-2086