Videna bicolor (Martens, 1864) Figures 43C, 52B

Trochomorpha bicolor Martens, 1864: 267.

Type locality.

"Im mittleren Sumatra" [= Central Sumatra].

Material examined.

Bukit Sekunyit: ME 1202. Gunung Doya: ME 3356, ME 8910, ME 9032, ME 9116. Gunung Kapor: ME 1199, ME 1205, ME 3361, ME 8775, ME 9225, ME 9844. Kampung Bunga Rampai: ME 1198. Lobang Angin: ME 8732, ME 9271. Gunung Batu: ME 1106, ME 1203, ME 1209, ME 8825.

Distribution in Borneo.

Sarawak: Kuching, Serian, Sibu, Mukah, Kapit, and Miri divisions. Sabah: Interior and West Coast divisions. Kalimantan: West and South Kalimantan provinces. Distribution elsewhere. Sumatra to Lesser Sunda (Vermeulen and Whitten 1998).

Remarks.

Living snails were observed foraging on wet rotten wood surfaces and crown of a plant of the limestone cliff. It differs from V. timorensis (Martens, 1867) by having a medium-sized dark brown shell with wide umbilicus and a smooth shell surface. This is the most common Videna species in Sarawak.