Abstract:
Hyla ephemera, new species, is described from the cloud forests of Cerro Las Flores in south-central Oaxaca, Mexico. We tentatively place this species in the phenetic H. bistincta group. It is most similar to H. calthula in color pattern but differs in having a greater snout-vent length, a relatively shorter snout and tibia, a relatively wider head, and a larger tympanum. We also report an additional locality record for H. calthula, previously known only from the type locality.