Xenodon histricus (Jan, 1863) (Squamata: Dipsadidae): distribution extension and new province record in Argentina

Xenodon histricus is probably the least known species of its genus in South America. In Argentina it has not been collected since 1937, and most records were restricted to the northeastern forests of the country. We report finding this species in 1995 at San José del Morro, San Luis province, Central Argentina. This report fills a gap in the distribution of this taxon, and constitutes the most recent record of the species for the country