After Moody, 1997, Hooks, 1998
<==o †Protostegidae Cope, 1872 sensu Moody, 1997 and Hooks, 1998 |--o †Chelospharginae Zangerl, 1953 | `-- †Chelosphargis advena (Hay, 1906) Zangerl, 1953 [Protostega advena Hay, 1906]; U. Cret. NA. EAs. NZ. `--o †Protosteginae Zangerl, 1953 |--o †Calcarichthyini Hook, 1998 | `-- †Calcarichelys gemma Zangerl, 1953; U. Cret. NA. `--o †Protostegini Hook, 1998 |?- †“Protostega” anglica Lydekker, 1889 [?Chelone jessoni Lydekker, 1889] Cret. WEu. |--o †Microstegina Hook, 1998 | `-- †Microstega copei (Wieland, 1909) Hook, 1998 [Archelon copei Wieland, 1909 (in partim); “Protostega” copei (Wieland, 1909) Hirayama, 1998] U. Cret. NA. `--+?- †Atlantochelys mortoni Agassiz, 1849 [?Pneumatoarthrus peloreus Cope, 1870]; U. Cret. NA. `--o †Protostegina Hook, 1998 |-- †Protostega gigas Cope, 1872; U. Cret. NA. EAs. [taxonomic history] `-- †Archelon ischyros Wieland, 1896 [Archelon marshi Wieland, 1900]; U. Cret. NA.
Reference(s):
- Hirayama, R., 1997: Distribution and diversity of Cretaceous chelonioids. 225-243.
in Callaway, J. M. & Nicholls, E. L., (eds.), 1997: Ancient marine reptiles.
–Academic Press, San Diego, London, Boston, New York, Sydney, Tokyo, Toronto, 1997, pp. xlvi - 501 - Hooks, III, G. E., 1998: Systematic revision of the Protostegidae, with a redescription of Calcarichelys gemma Zangerl, 1953.
–Journal of Vertebrate Paleontology: Vol. 18, #1, pp. 85-98 - Lapparent de Broin, F. de, 2000: African chelonians from the Jurassic to the Present: Phases of development and preliminary catalogue of the fossil record.
–Palaeontologica Africana:Vol. 36, pp. 43-82 - Moody, R. T. J., 1997: The paleogeography of marine and coastal turtles of the North Atlantic and Trans-Saharan regions. 259-278
in Callaway, J. M. & Nicholls, E. L., (eds.) 1997: Ancient Marine Reptiles.
–Academic Press, San Diego, London, Boston, New York, Sydney, Tokyo, Toronto, 1997, xlvi-501