Snout rounded, a little shorter than the diameter of the orbit; interorbital space broader than the upper eyelid.

Fingers moderate, first much shorter than second; toes moderate, one-third webbed; tips of fingers and toes not swollen; subarticular tubercles very distinct; two rather large, oval, compressed, very prominent metatarsal tubercles, outer somewhat larger than inner.

[5] The tadpole of Microhyla rubra has a transparent body with a long, tapering whip like tail.

Nares closed, narial depressions visible, located immediately anterior to two small concentrated patches of pigment, anterodorsolaterally directed, and closer to snout tip than to pupils.

M. rubra tadpoles live in water close to the surface and feed on plankton and suspended food particles.