A Taxonomic Revision of the Leptodactylid Frog Genus Syrrhophus Cope

The author reevaluates the taxonomy of a leptodactylid frog genus once applied across North and Central America, reviewing previous treatments and reassessing 23 nominal names. Examination of about 1,003 specimens, including most holotypes, with standardized measurements and ratios leads to recognition of 14 valid species arranged into five species groups. Each group is diagnosed by combinations of characters such as shape and expansion of digital pads, relative finger lengths, snout profile, metatarsal tubercle form, and presence of lateral digital fringes. The study supplies revised synonymies, new combinations, distributional notes, and illustrative figures.