IUCN threat status:

Vulnerable (VU)

Comprehensive Description

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Description

With a maximum snout-vent length of 102 mm, it is a large member of the Rana boylii group. Its distinquishing characteristics include an inner but no outer metatarsal tubercle, dorsolateral folds usually absent but occasionally present and poorly developed, an indistinct usually tympanium, and no vocal sacs in males. In addition, R. tarahumarae is pustulose and has a brown dorsum with small black or brown spots on the body, with white crossbars on the fron and hind limbs. The ventral body surface is white, the throat and chest can sometimes by gray with an indefinite melanophore pattern, and yellow con be present in the groin area. The tips of the toes are just a little bit expanded, and the toes are broadly webbed to the tips. In males, the first digit is enlarged and has a nuptial pad, but they lack vocal sacs.

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