Ptychopatula orcella (Stoliczka, 1873)

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 orcella (Stoliczka, 1873) Figure 45B

Pupa Pupa ( Pupisoma ) Pupisoma orcella Stoliczka, 1873: 33, pl. 2, fig. 2.

Type locality.

"Penang island".

Material examined.

Gunung Doya: ME 8925.

Distribution in Borneo.

Sarawak: Kuching Division. Sabah: Tawau Division. Distribution elsewhere. Malay Peninsula, Indo-Australian archipelago ( Vermeulen and Whitten 1998).

Remarks.

Only dry shells were found during the surveys. It differs from Ptychopatula circumlitum (Hedley, 1897) and P. dioscoricola (C. B. Adams, 1845) by having irregularly spaced ribs on shell surfaces (visible at 40 × magnification). This is probably the first record of sinistral form for species in the Genus Ptychopatula . For further details, see Pilsbry (1920-1921: 29).

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.