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:''Common names: green bush 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.〕〔Spawls S, Branch B. 1995. ''The Dangerous Snakes of Africa''. Ralph Curtis Books. Dubai: Oriental Press. 192 pp. ISBN 0-88359-029-8.〕 variable bush viper, leaf viper,〔 more.'' ''Atheris squamigera'' is a venomous viper species endemic to west and central Africa. No subspecies are currently recognized. The head is broad and flat, distinct from the neck. The mouth has a very large gape. The head is thickly covered with keeled, imbricate scales. The rostral scale is not visible from above. A very small scale just above the rostral is flanked by very large scales on either side. The nostrils are lateral. The eye and the nasal are separated by 2 scales. Across the top of the head, there are 7-9 interorbital scales. There are 10-18 circumorbital scales. There are 2 (rarely 1 or more than 2) rows of scales that separate the eyes from the labials. There are 9-12 supralabials and 9-12 sublabials. Of the latter, the anterior 2 or 3 touch the chin shields, of which there is only one small pair. The gular scales are keeled.〔 Midbody there are 15-23 rows of dorsal scales, 11-17 posteriorly. There are 152-175 ventral scales and 45-67 undivided subcaudals. It is possible that there is a variation in morphometric characters related to habitat:〔 The coloration is the same in some populations, but variable in others. The dorsal color varies from sage green or light green to green, dark green, bluish, olive or dark olive brown. Rare specimens may be found that are yellow, reddish or slate gray. The scales have light-colored keels and sometimes yellow tips that form a series of 30 or more light crossbands or chevrons. On the tail, there are 10-19 chevrons: not always clearly defined, but usually present. The ventral edge of the dorsum has light spots in pairs. An interstitial black color is visible only when the skin is stretched. The belly is yellow or dull to pale olive; it may be uniform in color, or heavily mottled with blackish spots. The throat is sometimes yellow. The tail has a conspicuous ivory white tip, 7–12 mm long, extending back over 10 subcaudals.〔 Neonates have a dark, olive coloration with wavy bars, paler olive or yellowish olive with fine dark olive margins, bars at intervals, and a belly that is paler greenish olive. The adult color pattern develops within 3 to 4 months.〔 ==Common names== Green bush viper,〔〔 variable bush viper,〔〔 leaf viper, common bush viper,〔 bush viper,〔Mehrtens JM. 1987. ''Living Snakes of the World in Color''. New York: Sterling Publishers. 480 pp. ISBN 0-8069-6460-X.〕 tree viper.〔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「Atheris squamigera」の詳細全文を読む スポンサード リンク
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