Snout slightly tapering but broadly rounded at the tip in dorsal view. Profile smoothly rounded and moderately long.

Tail moderately long, comprising less than two-thirds of total length. Tail musculature weak; muscular portion thin relative to body width in dorsal view. Tail fins originating at the trunk-tail junction, becoming moderately high and relatively flat in contour, and terminating in a blunt, rounded tip. Overall fin shape slightly lanceolate.

The tadpole resembles that of Ingerophrynus quadriporcatus, which lacks the dark blotch on the upper flank posterior to the gill region. Duttaphrynus melanostictus is similar in general body silhouette but is uniformly black, including ventrally. Ecological differences further separate these species: larvae of I. quadriporcatus occur in peat swamps, whereas I. divergens inhabits lowland dipterocarp and alluvial forests; D. melanostictus occurs exclusively in open habitats near or within human settlements. Rentapia hosii is restricted to medium-sized clear lowland streams. With the exception of R. hosii, these species share the presence of broad, unpapillated medial regions on both upper and lower lips. Tadpoles of Kurixalus chaseni (Rhacophoridae) are superficially similar in their small size and general body shape and occur in forest ponds and puddles; however, they differ from Ingerophrynus tadpoles by their fully papillated lower lip, different keratodont arrangement, and overall coloration.

Males call close to the breeding body of water, often in groups that form choruses. The call is a rasping trill. Calling congregations are loud and can be heard from the distance. Males clasp females around the armpits (axillary amplexus). Hundreds of eggs are laid in mucous strings.

Inger, R.F. (1985) Tadpoles of the forested regions of Borneo. Fieldiana Zoology new series 26: 1–89.