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Philodryas is a genus of colubrid snakes endemic to South America, commonly called green snakes.

Description


Philodryas

Species in the genus Philodryas share the following characters:

Head distinct from neck, with distinct canthus rostralis. Eye moderate or large. Pupil round. Body cylindrical or slightly laterally compressed. Tail long.

Dorsal scales arranged in 17 to 23 rows at midbody, more or less obliquely. Subcaudals divided (in two rows).

Maxillary teeth smallest anteriorly, 12-15, followed after a gap by two large grooved fangs located just behind the posterior border of the eye.

Venom


itle="Philodryas" alt="Philodryas" style="width:400px;display:block;margin-left: auto;margin-right: auto" src="http://upload.wikimedia.org/wikipedia/commons/thumb/e/e0/Philodryas_olfersii.jpg/220px-Philodryas_olfersii.jpg">

Although colubrid snakes are usually harmless to humans, Philodryas are opisthoglyphous (rear-fanged) snakes and can give a venomous bite. However, they have mild venom; so a bite is unlikely to cause lasting damage to humans.

Species and geographic ranges


Philodryas

There are 18 recognized species.

  • Philodryas aestiva (A.M.C. Duméril, Bibron & A.H.A. Duméril, 1854) - N Argentina, Bolivia, SE Brazil, Paraguay, Uruguay
  • Philodryas arnoldoi (Amaral, 1932) - SE Brazil
  • Philodryas baroni Berg, 1895 - N Argentina
  • Philodryas boliviana Boulenger, 1896 - Bolivia
  • Philodryas carbonelli Roze, 1957 - S Venezuela
  • Philodryas chamissonis (Wiegmann, 1834) - Chile
  • Philodryas livida (Amaral, 1923)
  • Philodryas mattogrossensis Koslowsky, 1898 - Bolivia, SW Brazil, Paraguay
  • Philodryas nattereri Steindachner, 1870 - WC Brazil, Paraguay
  • Philodryas olfersii (Lichtenstein, 1823) - Argentina, Bolivia, W Brazil, Paraguay, E Peru, Uruguay
  • Philodryas oligolepis Gomes, 1921 - Minas Gerais, Brazil
  • Philodryas patagoniensis (Girard, 1857) - Argentina, Bolivia, Brazil
  • Philodryas psammophidea Günther, 1872 - Argentina, W & S Brazil
  • Philodryas simonsi Boulenger, 1900 - Ecuador, Peru
  • Philodryas tachymenoides (Schmidt & Walker, 1943) - Chile, Peru
  • Philodryas trilineata (Burmeister, 1861)
  • Philodryas varia (Jan, 1863)
  • Philodryas viridissima (Linnaeus, 1758) - N South America in Amazon and Paraguay River basins

References


Philodryas

Further reading



  • Wagler, J.G. 1830. Natürliches System der Amphibien, mit vorangehender Classification des Säugthiere und Vögel. Ein Beitrag zur vergleichenden Zoologie. J.G. Cotta. Munich, Stuttgart, and Tübingen. vi + 354 pp. (Genus Philodryas, p. 185.)

Philodryas

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