"megastomatohyla" are small frogs. they lay their eggs in streams. the largest frog in "megastomatohyla" is about long from nose to rear end. males do not sing for the females and they do not have vocal slits. they do not have nuptial pads on their thumbs. the eardrum is not visible. the front feet have only a little webbed skin, and the back feet have more webbed skin.