Paralaoma angusta Vermeulen, Liew & Schilthuizen, 2015

Marzuki, Mohammad Effendi bin, Liew, Thor-Seng & Mohd-Azlan, Jayasilan, 2021, Land snails and slugs of Bau limestone hills, Sarawak (Malaysia, Borneo), with the descriptions of 13 new species, ZooKeys 1035, pp. 1-113 : 1

Paralaoma angusta Vermeulen, Liew & Schilthuizen, 2015 Figures 36A , 37

Paralaoma angusta Vermeulen et al., 2015: 109, fig. 76A, B.

Type locality.

"Malaysia, Sabah, West Coast Province, Crocker Range, Kiansom Waterfall".

Material examined.

Gunung Doya: ME 8927, ME 8945, ME 8994. Gunung Kapor: ME 1734, ME 1760, ME 1927, ME 8976, ME 9042, ME 9067, ME 9262, ME 9641. Kampung Bunga Rampai: ME 0741. Lobang Angin: ME 9265. Gunung Batu: ME 1756, ME 1763, ME 8836.

Distribution in Borneo.

Sarawak: Kuching and Serian divisions. Sabah: West Coast Division. Kalimantan: South Kalimantan Province. Endemic to Borneo.

Remarks.

This is the first record of this species in Sarawak. Living snails were observed foraging among leaf litter and plant debris near the cliffs in a lowland limestone forest. The shells from Bau are slightly larger and more obese than the shells from Sabah. Dimensions: Height <1.65 mm; width <2.37 mm; diameters of the first three whorls 0.41 mm, 0.93 mm, and 1.65 mm, respectively; number of whorls < 4½; aperture height <0.93 mm; aperture width <1.24 mm.

Figures

Figure 36. A Paralaoma angusta Vermeulen, Liew & Schilthuizen, 2015 ME 9641 Gunung Kapor B Paralaoma sarawakensis, sp. nov., ME 2269 Paratype Gunung Doya C Charopa sp. " Charopa argos " ME 8593 Gunung Doya.

Figure 37. Paralaoma angusta Vermeulen, Liew & Schilthuizen, 2015 A-F ME 1763 A apertural view B apical view C basal view D enlargement of the apical side showing the apex E enlargement of the body whorl showing the shell sculpture F enlargement of the basal side of the shell.