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Massasauga
:''Common names: massasauga, black massasauga, black rattler,〔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.〕 more.''
The massasauga (''Sistrurus catenatus'') is a venomous pitviper rattlesnake species found primarily in the United States. Three subspecies are currently recognized including the nominate subspecies described here.
==Description==
The adults are not large, ranging from in length.〔(Eastern Massasauga ), Ontario Nature〕 The color pattern consists of a grey or tan ground color with a row of large rounded brown/black blotches or spots down the center of the back and three smaller rows of alternating spots down each side. Solid black melanistic examples are also known, as well as cases where the back blotches join with those on the sides. Young massasauga are well-patterned but paler than the adults. It has heat-sensing pits on each side of its smallish head, the scales are keeled and the anal scale is single.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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