Ptychopatula dioscoricola (C. B. Adams, 1845)

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

Ptychopatula dioscoricola (C. B. Adams, 1845) Figure 45A

Helix dioscoricola C. B. Adams, 1845: 16.

Type locality.

“Jamaica”.

Material examined.

Gunung Doya: ME 8942, ME 8997. Gunung Kapor: ME 8151, ME 8502, ME 9006, ME 9027, ME 9070. Kampung Padang Pan: ME 6830. Lobang Angin: ME 9140, ME 9173.

Distribution in Borneo.

Sarawak: Kuching, Bintulu, Miri, and Limbang divisions. Sabah: Sandakan Division. Distribution elsewhere. Circumtropical (Pilsbry 1920-1921).

Remarks.

Only dry shells were found during the surveys. It differs from P. circumlitum (Hedley, 1897) and P. orcella (Stoliczka, 1873) in having a higher spired shell with an umbilicus that is partly or entirely covered by the reflected peristome. This species also differs from P. pulvisculum (Issel, 1874) in having a larger shell with spiral lirae on shell surfaces.

Figures

Figure 45. A Ptychopatula dioscoricola (C. B. Adams, 1845) ME 9070 Gunung Kapor B Ptychopatula orcella (Stoliczka, 1873) ME 8925 Gunung Doya C Pupisoma moleculina (Van Benthem-Jutting, 1940) ME 9051 Gunung Kapor D Pupisoma pulvisculum (Issel, 1874) ME 9055 Gunung Kapor E Boysidia salpinx F. G. Thompson & Dance, 1983 ME 8781 Gunung Kapor.