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''Bothrops ammodytoides'' is a venomous pit viper species endemic to Argentina.〔 No subspecies are currently recognized. :''Common names: Patagonian lancehead,〔Campbell JA, Lamar WW. 2004. ''The Venomous Reptiles of the Western Hemisphere''. Comstock Publishing Associates, Ithaca and London. 870 pp. 1500 plates. ISBN 0-8014-4141-2.〕 yararanata,〔(Nomi Rettili Italiano - Inglese ) at (serpenti.it ). Accessed 7 November 2006.〕 Patagonian pit viper.〔Brown JH. 1973. ''Toxicology and Pharmacology of Venoms from Poisonous Snakes''. Springfield, Illinois: Charles C. Thomas. 184 pp. LCCCN 73-229. ISBN 0-398-02808-7.〕'' ==Description== This species has a stocky build and grows to an average total length of 45–75 cm (18-30 inches), but is capable reaching almost 1 m (39 inches) in total length. The rostral scale is elongated vertically and the snout is upturned, similar to the hog-nosed pitvipers of the genus ''Porthidium''.〔 Dorsally, it is pale brown, with a series of large squarish dark brown spots or crossbars which are edged with black. On some specimens these markings alternate to form a zigzag stripe. There is a dark streak behind the eye. Ventrally, it is yellowish with brown dots. The very strongly keeled dorsal scales are arranged in 23 or 25 rows at midbody. Ventrals 149-160; anal plate entire; subcaudals 30-38, divided. The dorsal surface of the head is covered by small, imbricate, keeled scales. The large supraoculars are separated by 8 or 9 rows of these small scales. Two rows of scales separate the eye from the upper labials. Upper labials 9 or 10, the 2nd separated from the loreal pit, the 3rd and 4th largest. The temporal scales are keeled.〔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 ammodytoides'', p. 543.)〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Bothrops ammodytoides」の詳細全文を読む スポンサード リンク
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