Xenopholis
Xenopholis is a genus of rear-fanged snakes of the family Colubridae. Geographic range. The genus "Xenopholis" is endemic to South America. Description. The genus "Xenopholis" is characterized by distinctive vertebrae. The spinous processes are expanded dorsally, forming shields which are rugose and divided by a median groove. Species. Three species are recognized as being valid. "Nota bene": A binomial authority in parentheses indicates that the species was originally described in a genus other than "Xenopholis".