After Westgate & Ward, 1981, Holman, 1982, Hutchison, 1985, Parmley & Case, 1988, and Head, Holroyd, Hutchison & Ciochon, 2005
<==o †Palaeophidae Lydekker, 1888 [Palaeophiidae] |?- †Vialovophis zhylan |?-o †Nessovophis | |-- †N. zhylga | `-- †N. tamdy |--o †Archaeophinae | |?- †“Archaeophis” turkmenicus | `-- †Archaeophis proavus `--o †Palaeophinae [Palaeophiinae] |--o †Palaeophis Owen, 1841 [Dinophis, Titanophis, Vialovophis] | |?- †P. sp. [E.Eoc. Ind.] (Rage et al., 2008) | |-- †P. colossaeus | |-- †P. ferganicus | |-- †P. udovichenkoi | |-- †P. nessovi | |-- †P. littoralis Cope, 1868 | |-- †P. casei Holman, 1982 | `-- †P. virginianus Lynn, 1934 `--o †Pterosphenus Lucas, 1899 |?- †P. sp. [E.Eoc. Ind.] (Rage et al., 2008) |-- †P. biswasi |-- †P. kutchensis Rage, Bajbai, Thewissen & Tiwari, 2003 |-- †P. muruntau |-- †P. schucherti Lucas, 1899 `-- †P. schweinfurthi
Reference(s):
- Head, J. J., Holroyd, P. A., Hutchison, J. H. & Ciochon, R. L., 2005: First report of snakes (Serpentes) from the late Middle Eocene Pondaung Formation, Myanmar.
–Journal of Vertebrate Paleontology: Vol. 25, #1, pp. 246-250 - Holman, J. A., 1982: Palaeophis casei, new species, a tiny palaeophid snake from the Early Eocene of Mississippi.
–Journal of Vertebrate Paleontology: vol. 2, #2,, pp. 163-166. - Hutchison, J. H., 1985: Pterosphenus cf. schucherti Lucas (Serpentes, Palaeophidae) from the Late Eocene of peninsular Florida.
–Journal of Vertebrate Paleontology: Vol. 18, pp. 412-419 - Parmley, D. & Case, G. R., 1988: Palaeopheid snakes from the Gulf coastal region of North America.
–Journal of Vertebrate Paleontology: Vol. 8, #3, pp. 334-339 - Rage, J.-C., Folie, A., Rana, R. S., Singh, H., Rose, K. D. & Smith, T., 2008: A diverse snake fauna from the early Eocene of Vastan Lignite Mine, Gujarat, India.
–Acta Palaeontologica Polonica: Vol. 53, #3, pp. 391-403 - Westgate, J. W. & Ward, J. F. 1981: The giant aquatic snake Pterosphenus schuberti (Palaeophidae) in Arkansas and Missisippi.
–Journal of Vertebrate Paleontology: vol. 1, #2, pp. 161-164.