Reptilia, Squamata, Colubridae, Liophis sagittifer sagittifer: distribution extension

Liophis sagittifer sagittifer (Jan 1863) is a medium-sized colubrid snake (maximum SVL ~1020 mm) distributed in Argentina, Paraguay, and Bolivia (Dixon and Thomas 1982; Giraudo and Scrocchi 2002). Is a diurnal terrestrial snake found in Patagonica, Monte and Pampeana phytogeographic provinces that intergrades with Liophis sagittifer modestus in Espinal and Chaqueña provinces (Giraudo and Scrocchi 2002). Southernmost record of this species is by Koslowsky (1896), who mention the existence of specimens in Chubut but without any specific locality. Later, Dixon and Thomas (1982) indicates five records of L. sagittifer sagittifer south of province of La Pampa, in central Argentina but all from bibliographic sources. These authors marked a point near the boundaries of provinces of Rio Negro and Chubut at approximately 42° S latitude. According to Cei (1986) the southern distribution limit is peninsula de Valdes, in northeastern Chubut. In a recent field guide (Scolaro 2005) the general geographic distribution marked is north of Chubut river.