Haploptychius sp.

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

Haploptychius sp. Figs 4A , 9C

Material examined.

Locality no. 6: CUMZ-CM179 (1 specimen in ethanol). Locality no. 11: CUMZ-CM074 (12 shells; Fig. 9C ), CUMZ-CM075 (1 shell), CUMZ-CM076 (14 specimens in ethanol; Fig. 4A ). Locality no. 12: CUMZ-CM098 (8 shells), CUMZ-CM099 (1 shell), CUMZ-CM100 (9 specimens in ethanol). Locality no. 13: CUMZ-CM121 (21 shells), CUMZ-CM122 (1 specimen in ethanol). The snails were found to live on the ground among leaf litter in the limestone area.

Remarks.

This species is similar to H. michaui (Crosse & Fischer, 1863), but the latter is more ovate and less oblique in shell shape. In addition, this species can be distinguished from H. pellucens (Pfeiffer, 1863), H. porrectus (Pfeiffer, 1863) and H. perlissus Vermeulen et al., 2019 by having strong and prominent radial ridges. For comparison, the latter three species have a smooth to nearly smooth shell surface, H. pellucens has an oblique-ovate shell shape, H. porrectus and H. perlissus have an oblique heliciform shell shape (see Inkhavilay et al. 2016, and Vermeulen et al. 2019b for further comparison).

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.