Pincerna globosa (H. Adams, 1870) Figures 2B, 47D

Alycaeus globosus H. Adams, 1870: 794.

Type locality.

"Busan, near Sarawak, Borneo" [= Jambusan Hills, Bau, Sarawak].

Material examined.

Bukit Sekunyit: ME 1016, ME 6980. Gunung Doya: ME 1059, ME 9698, ME 8958, ME 9090. Gunung Kapor: ME 1004, ME 1015, ME 1053, ME 8489, ME 8974. Gunung Stulang: ME 5904. Lobang Angin: ME 1029, ME 6979, ME 8726, ME 8746, ME 8749, ME 9022. Gunung Batu: ME 1014, ME 1023, ME 1054, ME 8829.

Distribution in Borneo.

Sarawak: Kuching, Serian, and Miri divisions. Sabah: West Coast Division. Endemic to Borneo.

Remarks.

Smith (1895) classified Pincerna globosa into five different forms: Pincerna globosa, Pincerna rabongensis, muluana, kinabaluana, and pygmaea, of which two forms were collected from Bau: Pincerna globosa with a smaller yellowish orange shell while Pincerna rabongensis has a larger yellow shell. The differences between the two forms may due to sexual dimorphism; hence, we considered these forms as synonyms. Living snails were observed foraging on the leaf surfaces of small trees and palms at the base of the limestone cliff.