The lower surfaces are whitish, except for the paired subgular vocal sac in males, which is light brown.

[2] Tadpoles of Gosner stage 40 measure about 43 mm (1.7 in) in total length, of which the tail makes little more than one half.

They are greenish yellow on head-body and tail, with black spots on body and caudal muscle.

[1][3] Meristogenys maryatiae occurs in lowland to lower montane tropical primary and secondary rainforests at elevations of 155–1,000 m (509–3,281 ft) above sea level; it has also been recorded in a stream running through a rubber plantation.

Tadpoles have been seen clinging to bare rock in a shallow portion of a swift stream.