Plectostoma wallacei busauense (E. A. Smith, 1893) Figure 12D

Opisthostoma busauense E. A. Smith, 1893: 348, pl. 25, figs 16, 16A.

Type locality.

"Busau, N.W. Borneo" [= Jambusan Hills, Bau, Sarawak].

Material examined.

Bukit Sekunyit: ME 2145. Gunung Doya: ME 9495.

Distribution in Borneo.

SARAWAK: Kuching Division. Endemic to Borneo.

Remarks.

Living snails were observed foraging on the wet vertical limestone rock surfaces covered with mosses and lichens.