[1][3] The specific name personatus is Latin adjective meaning "masked", in reference to the head coloration.

The finger and the toe tips have grooved terminal discs; no webbing is present.

The anterior half of the head is black, contrasting with the reddish brown coloration of the rest of the dorsal surfaces; there are some black dorsal markings that greatly vary in their intensity between individuals.

[2] Callulops personatus occurs in lowland rainforest, secondary forest, and anthropogenic grassland at elevations of 240–1,000 m (790–3,280 ft) above sea level,[1] perhaps lower.

[2] The holotype was collected from the mouth of one-foot deep burrow and was spotted based on its call.