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:''Common names: Malayan ground pit viper, Malayan pit viper, Malayan ground snake, Malayan moccasin. ''Calloselasma'' is a monotypic genus created for a venomous pitviper species, ''C. rhodostoma'', which is endemic to Southeast Asia from Thailand to northern Malaysia and on the island of Java.〔 No subspecies are currently recognized. ==Description== Attains an average total length of , with females being slightly longer than males. Occasionally, they may grow as long as .〔Mehrtens JM. 1987. ''Living Snakes of the World in Color''. New York: Sterling Publishers. 480 pp. ISBN 0-8069-6460-X.〕 A specimen with a total length of has a tail long. Dorsally it is reddish, grayish, or pale brown, with two series of large, dark brown, black-edged triangular blotches, which are alternating or opposite. There is also a thin dark brown vertebral stripe, which may be interrupted or indistinct in some specimens. The upper labials are pink or yellowish, and powdered with brown. There is a broad, dark brown, black-edged diagonal stripe from the eye to the corner of the mouth, with a narrower light-colored stripe above it. Ventrally it is yellowish, uniform or powdered or spotted with grayish brown. The smooth dorsal scales are arranged in 21 rows at midbody. Ventrals 138-157; anal plate entire; subcaudals 34-54 pairs. Snout pointed and upturned. Rostral as deep as broad. Two internasals and two prefrontals. Frontal as long as or slightly longer than its distance from tip of snout, as long as or slightly shorter than the parietals. 7-9 upper labials. Loreal pit not in contact with the upper labials.〔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. (''Ancistrodon rhodostoma'', pp. 527-528.)〕 This is the only Asian pit viper with large crown scales and smooth dorsal scales.〔U.S. Navy. 1991. ''Poisonous Snakes of the World''. US Govt. New York: Dover Publications Inc. 203 pp. ISBN 0-486-26629-X.〕 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「Calloselasma」の詳細全文を読む スポンサード リンク
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