Opisthostoma brachyacrum brachyacrum Thompson, 1978 Figure 10B

Opisthostoma (Opisthostoma) brachyacrum Thompson, 1978: 388-389, figs 2A-E.

Type locality.

"BORNEO: Sarawak. Fourth Division. Limestone hill on the trail from the Niah River to Niah Cave, Batu Niah".

Material examined.

Gunung Kapor: ME 0285. Gunung Batu: ME 0279, ME 0284, ME 0353.

Distribution in Borneo.

Sarawak: Kuching and Miri divisions. Endemic to Borneo.

Remarks.

Living snails were observed foraging among leaf litter and plant debris near the cliff in a lowland limestone forest.