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Proceratophrys Miranda-Ribeiro, 1920 includes 18 species of cycloramphids (Frost 2009) commonly known as the smooth horned frogs (Frank and Ramus 1995). As indicated by the group’s common name, the eyelids of many species are adorned with elongate dermal appendages (for review see Prado and Pombal 2008). Several other species of Proceratophrys lack conspicuous palpebral appendages, including the type species P. bigibbosa (Peters 1872) and P. brauni Kwet and Faivovich 2001. These species are included in the P. bigibbosa species group, which was characterized by Lynch (1971) as lacking hornlike palpebral appendages and having a short, blunt snout, postocular cranial protuberances, and large marginal tubercles on eyelids.

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Amphibia, Anura, Cycloramphidae, Proceratophrys bigibbosa (Peters, 1872) and Proceratophrys brauni Kwet and Faivovich, 2001: distribution extension and new state record