Callulops eremnosphax is a species of frog in the family Microhylidae.

It is endemic to Papua New Guinea and only known from its type locality near Tekadu Airport in the Gulf Province.

The upper flanks are noticeably lighter brown, and the coloration gradually turns to light gray-brown towards the venter.

The rest of the venter is light gray-brown, albeit possibly with brown stippling reducing the contrast with the darker anterior parts.

[1] The type series was collected from the floor of alluvial wet forest at 120 m (390 ft) above sea level.