Syntypes: MHNN 6 and 7
Lectotype: MHNN 6
Type-locality: "Republica Peruana" (Peru)
Hills of the Pacific coastal region and versant of Peru, up to 1800 m (McDiarmid et al. 1999).
Distribution: Peru (along the pacific coast, elevation up to 1800 m)
Type locality: high mountains of Peru (in error fide SCHMIDT & WALKER 1943), actually “Lima, Peru”.
Adults may attain a total length of 31 cm (12 in), which includes a tail 4.3 cm (1.7 in) long.
Dorsally, Bothrops pictus has a pale brown ground color, overlaid with a series of large brown black-edged squarish blotches, which may merge to form a thick wavy or zig zag stripe. On each flank is a series of smaller roundish blotches of the same color as the dorsal blotches. There is a dark streak from behind the eye to the corner of the mouth. Ventrally, it is yellowish with brown dots or spots.
The strongly keeled dorsal scales are arranged in 21 to 23 rows at midbody. Ventrals 157-172; anal plate undivided; subcaudals divided, 40-74 pairs.
- Boulenger, G.A. 1896. Catalogue of the Snakes in the British Museum (Natural History). Volume III., Containing the...Viperidæ. Trustees of the British Museum (Natural History). London. xiv + 727 pp. + Plates I.- XXV. (Lachesis pictus, pp. 540-541.)
- The Reptile Database. www,reptile-database.org.
- McDiarmid RW, Campbell JA, Touré T. 1999. Snake Species of the World: A Taxonomic and Geographic Reference, Volume 1. Herpetologists' League. 511 pp. ISBN 1-893777-00-6 (series). ISBN 1-893777-01-4 (volume).
- "Bothrops". Integrated Taxonomic Information System. http://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=209554. Retrieved 3 November 2006.
- Tschudi, J.J. 1845. Reptilium conspectus quae in Republica Peruana reperiuntur et pleraque observata vel collecta sunt in itinere. Archiv für Naturgeschichte 11 (1): 150-170. (Lachesis picta, p. 166.)
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