Opisthostoma ballorum Vermeulen, 1991 Figure 10A

Opisthostoma ballorum Vermeulen, 1991a: 162-163, fig. 10b.

Type locality.

"SARAWAK. 1st Div.: G. Kapur 6 km SE of Bau".

Material examined.

Gunung Doya: ME 8989, ME 9109, ME 9149. Gunung Kapor: ME 0274, ME 0277, ME 9002, ME 9206. Lobang Angin: ME 9171. Gunung Batu: ME 0273, ME 0276, ME 0331, ME 8796.

Distribution in Borneo.

Sarawak: Kuching Division. Endemic to Borneo.

Remarks.

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