棘螈屬(學名:Echinotriton)是有尾目蠑螈科的一屬,分佈在東亞地區。目前本屬僅確定3種。[1]
特徵
棘螈物種頭軀明顯寬扁,無唇褶,舌呈亞卵圓形,前後粘連。尾細弱而短,明顯短於頭體長,末端呈杆狀。犁骨齒列呈「∧」形,前額骨2枚甚短。鼻突短,鼻骨大,左右相觸。額鱗弧粗壯,方骨及翼骨與上頜骨相接觸面大而牢固。最主要的屬征是方骨後外側有1個向前彎曲的鈎狀突;前若干枚肋骨各有1個強大之肋突,成分叉狀,末端刺入瘰疣中或突出皮膚。成體營陸棲生活,幼體在靜水中生活,有1對平衡枝,當年完成變態。[2]
種類
參考
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