蛇鱗是覆蓋在爬行綱有鱗目蛇亞目物種身體上的角質鱗片,角質鱗片的相鄰部分以薄層相聯,因而構成完整的鱗被,對於防止體內水分蒸發有重要作用。[1]陸棲和樹棲類蛇的腹鱗能在肌肉作用下前後運動,是其爬行的主要工具。[2]蛇鱗的形狀、大小、數量、分布排列方式等也是分類的重要依據。
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