Abstract
Hylodidae is a family of rheophilic frogs from the Atlantic Forest that can be separated into the voiceless (Megaelosia and Phantasmarana) and the vocally active (Crossodactylus and Hylodes) genera, with the latter group being able to emit advertisement calls. Vocally active species also tend to show larger diameter of the tympanic membrane (DTM) in relation to their snout-vent length (SV…