A new species of hognose pitviper, genus Porthidium, from the southwestern Pacific of Costa Rica (Serpentes: Viperidae)

A new species of terrestrial pitviper, Porthidium porrasi, is described from mesophytic forests of the Península de Osa and surrounding area of the Pacific versant of southwestern Costa Rica. It is most similar to P. nasutum and is characterized by a pattern of bands, persistence of the juvenile tai...

Full description

Main Authors: Lamar, William W., Sasa Marín, Mahmood
Format: Artículo
Language: Inglés
Published: Universidad de Costa Rica 2014
Subjects:
Online Access: http://revistas.ucr.ac.cr/index.php/rbt/article/view/16051
http://hdl.handle.net/10669/27297
Summary: A new species of terrestrial pitviper, Porthidium porrasi, is described from mesophytic forests of the Península de Osa and surrounding area of the Pacific versant of southwestern Costa Rica. It is most similar to P. nasutum and is characterized by a pattern of bands, persistence of the juvenile tail color in adults, and a high number of dorsal scales. Analysis of mtDNA sequences confirms its distinction from P. nasutum. The existence of this species reinforces the notion of elevated herpetofaunal endemism in southwestern Costa Rica.