Quantula weinkauffiana (Crosse & Fischer, 1863)

Sutcharit, Chirasak, Thach, Phanara, Chhuoy, Samol, Ngor, Peng Bun, Jeratthitikul, Ekgachai, Siriwut, Warut, Srisonchai, Ruttapon, Ng, Ting Hui, Pholyotha, Arthit, Jirapatrasilp, Parin & Panha, Somsak, 2020, Annotated checklist of the land snail fauna from southern Cambodia (Mollusca, Gastropoda), ZooKeys 948, pp. 1-46 : 1

Quantula weinkauffiana (Crosse & Fischer, 1863) Figs 4B , 9E, F

Helix weinkauffiana Crosse & Fischer, 1863: 350, 351. Type locality: Cochinchine [Southern Vietnam].

Quantula weinkauffiana : Inkhavilay et al. 2019: 71, figs 32b-d, 55h.

Material examined.

Locality no. 1: CUMZ-CM002 (8 shells). Locality no. 2: CUMZ-CM006 (10 shells). Locality no. 5: CUMZ-CM011 (2 shells). Locality no. 7: CUMZ-CM013 (82 shells), CUMZ-CM014 (1 shell), CUMZ-CM015 (1 shell + 1 specimen in ethanol; Fig. 4B ). Locality no. 9: CUMZ-CM034 (7 shells), CUMZ-CM035 (3 shells). Locality no. 10 CUMZ-CM052 (1 shell). Locality no. 12: CUMZ-CM093 (5 shells). Locality no. 13: CUMZ-CM120 (5 shells). Locality no. 17: CUMZ-CM135 (3 shells). Locality no. 18: CUMZ-CM143 (3 shells), CUMZ-CM144 (1 shell). Locality no. 16: CUMZ-CM166 (4 shells), CUMZ-CM177 (1 shell). Locality no. 6: CUMZ-CM174 (9 shells), CUMZ-CM175 (2 shells; Fig. 9E, F ). The small juveniles were found on tree trunks and leaves, while the adults were found to live on the ground among leaf litter.

Distribution.

Cambodia, Laos, Thailand and Vietnam ( Schileyko 2011, Inkhavilay et al. 2019).

Remarks.

This species was originally described from “Cochinchina”. The distinguishing characters are a depressed-conic to conic shell shape and brownish shell colour. The last whorl is round to angular, with upper shell surface sculptured with fine radial ridges, below the periphery the surface is usually smooth. The aperture is sub-circular, with lip thickened in adult specimens. However, this species tends to have a highly variable shell from depressed-conic to dome-shaped shell, and the last whorl rounded (Fig. 9F ) to angular (Fig. 9E ).

The living snail has reticulated skin, yellowish to pale orange body, usually with dark longitudinal anterior stripes. Quantula weinkauffiana is considered to be a common species in Cambodia, where they can be found in both natural and highly disturbed human-modified habitats, such as agricultural plantations. Although Brumpt et al. (1968) reported that Q. striata from Cambodia is an intermediate host of the rat lungworm Angiostrongylus cantonensis , the land snail species in that study was more likely Q. weinkauffiana .

Figures

Figure 4. Living snails of A Haploptychius sp. B Quantula weinkauffiana (Crosse & Fischer, 1863) C Trochomorpha paviei (Morlet, 1885) D Cryptozona siamensis (Pfeiffer, 1856) E Hemiplecta distincta (Pfeiffer, 1850) F Cambodiparmarion doroshenkoi Kuznetsov & Kuzminykh, 1999 G Parmarion martensi Simroth, 1893 and H Durgella russeola (Morelet, 1865). All not to scale.

Figure 9. A Allopeas gracile (Hutton, 1834) B Lissachatina fulica (Bowdich, 1822) C Haploptychius sp. D Dyakia sp. and E, F Quantula weinkauffiana (Crosse & Fischer, 1863) with E angular last whorl and F rounded last whorl.