Stomacosmethis sadongensis (E. A. Smith, 1895) Figures 2D, 47C

Alycaeus (Orthalycaeus) sadongensis Smith, 1895: 117, pl. 3, fig. 27.

Type locality.

"Sadong, Sarawak".

Material examined.

Gunung Kapor: ME 1003, ME 8761. Gunung Batu: ME 2896, ME 2900, ME 8804.

Distribution in Borneo.

Sarawak: Kuching and Serian divisions. Endemic to Borneo.

Remarks.

This species differs from other Bornean species of Stomacosmethis by having a shell with dense, regular, rather low riblets on the shell instead of irregular low riblets. Living snails were observed foraging on wet vertical limestone rock surfaces covered with mosses and lichens.