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perennibranchiate
Perennibranchiate, in zoology, is the condition of an organism retaining branchae, or gills, through life;〔William Benjamin Carpenter, 1854〕 This condition is generally said of certain amphibia, such as the mudpuppy; the term is opposed to caducibranchiate. In some cases only a small proportion of a given amphibian population is perennibranchiate, but in other instances a preponderance of the individuals have an adult gill retention. For example, in the case of the Rough-skinned Newt in the Cascade Mountains populations, approximately ninety percent of the adult population is perennibranchiate.〔C. Michael Hogan, 2008〕
==See also==
* Neoteny
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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