A new species of Ischnocnema (Anura: Eleutherodactylinae) from open areas of the Cerrado Biome in southeastern Brazil

Abstract

We describe a new species of Ischnocnema from the Cerrado (Brazilian savanna) of the Triângulo Mineiro region, state of Minas Gerais. Comparisons were made with those species historically thought to be closely related to I. juipoca. Topotype males (14.9–18.7 mm SVL) of the new species are smaller than those of Ischnocnema juipoca, I. octavioi, Eleutherodactylus heterodactylus, Pristimantis dundeei, and P. crepitans. Different from E. heterodactylus and P. crepitans, the new species does not have expanded discs on finger III and IV. The new species is different from P. dundeei by lacking finger/toe discs and nuptial pads. A marked sexual dimorphism in size is absent in P. crepitans and present in the new species. Different from the new species, I. verrucosa is coarsely tuberculate on dorsal surfaces. Ischnocnema verrucosa, I. octavioi, and P. dundeei are primarily forest dwellers while the new species is common in open areas. The advertisement call of the new species has more (1.5–2.5 times) pulses and higher (1.3–1.8 times) pulse repetition rate than that of I. juipoca.