Perennibranchiate, in zoology, is the condition of an organism retaining branchae, or gills, through life; 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.
- William Benjamin Carpenter (1854) Principles of Comparative Physiology, Published by Blanchard and Lea, 752 pages
- C. Michael Hogan (2008) Rough-skinned Newt (Taricha granulosa), Globaltwitcher, ed. Nicklas Stromberg 
- William Benjamin Carpenter, 1854
- C. Michael Hogan, 2008
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