Pincerna globosa (H. Adams, 1870)

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

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.

Figures

Figure 2. A Chamalycaeus specus (Godwin-Austen, 1889) ME 9046 Gunung Kapor B Pincerna globosa (H. Adams, 1870) ME 6979 Lobang Angin C Stomacosmethis hosei (Godwin-Austen, 1889) ME 1010 Gunung Batu D Stomacosmethis sadongensis (E. A. Smith, 1895) ME 8761 Gunung Kapor.

Figure 47. Living snails from Bau A Cyclophorus perdix borneensis (Metcalfe, 1851) ME 8753 Gunung Kapor B Platyrhaphe linita (Godwin-Austen, 1889) ME 9700 Gunung Doya C Stomacosmethis sadongensis (E. A. Smith, 1895) ME 8761 Gunung Kapor D Pincerna globosa (H. Adams, 1870) ME 8749 Lobang Angin. All not to scale.