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:''Common names: Saharan horned viper,〔Mallow D, Ludwig D, Nilson G. 2003. ''True Vipers: Natural History and Toxinology of Old World Vipers''. Malabar, Florida: Krieger Publishing Company. 359 pp. ISBN 0-89464-877-2.〕 horned desert viper,〔Mehrtens JM. 1987. ''Living Snakes of the World in Color''. New York: Sterling Publishers. 480 pp. ISBN 0-8069-6460-X.〕 more.'' ''Cerastes cerastes'' is a venomous viper species native to the deserts of Northern Africa and parts of the Middle East. It often is easily recognised by the presence of a pair of supraocular "horns", although hornless individuals do occur.〔 No subspecies are currently recognised. ==Description== The average total length (body + tail) is , with a maximum total length of . Females are larger than males.〔 One of the most distinctive characteristics of this species is the presence of supraorbital "horns", one over each eye. However, these may be reduced in size or absent (see genus ''Cerastes'').〔 The eyes are prominent and set on the sides of the head.〔 There is significant sexual dimorphism, with males having larger heads and larger eyes than females. Compared to ''C. gasperettii'', the relative head size of ''C. cerastes'' is larger and there is a greater frequency of horned individuals (13% versus 48%, respectively).〔〔Werner YL, Verdier A, Rosenman D, Sivan N. 1991. Systematics and Zoogeography of ''Cerastes'' (Ophidia: Viperidae) in the Levant: 1. Distinguishing Arabian from African ''"Cerastes cerastes"''. ''The Snake'' 23: 90-100.〕 The colour pattern consists of a yellowish, pale grey, pinkish, reddish, or pale brown ground colour that almost always matches the substrate colour where the animal is found. Dorsally, a series of dark, semi-rectangular blotches runs the length of the body. These blotches may or may not be fused into crossbars. The belly is white. The tail, which may have a black tip, is usually thin.〔〔Spawls S, Branch B. 1995. ''The Dangerous Snakes of Africa''. Dubai: Ralph Curtis Books. Oriental Press. 192 pp. ISBN 0-88359-029-8.〕 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「Cerastes cerastes」の詳細全文を読む スポンサード リンク
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