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AmphibiaWeb Species List: Sirenidae - English
URL: http://elib.cs.berkeley.edu/aw/lists/Sirenidae.shtml

Elongate medium to large (750mm) aquatic salamanders with external gills. The pelvic girdle and hind limbs are absent in all species. They are distributed in the southern United States and northern Mexico.

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Sirenidae - English
URL: http://tolweb.org/tree?group=Sirenidae&contgroup=Caudata

Cladogram.

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