Opisthoporus bernardii (Pfeiffer, 1862)

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

Opisthoporus bernardii (Pfeiffer, 1862) Fig. 6E

Rhiostoma bernardii Pfeiffer, 1862: 45, 46, pl. 6, fig. 5. Type locality: Siam [Thailand]. Kobelt 1911: 761, pl. 111, figs 9, 10.

Cyclotus bernardii : Inkhavilay et al. 2019: 19, fig. 8d, e.

Opisthoporus bernardii : Do et al. 2020: 108, table 3.

Material examined.

Locality no. 9: CUMZ-CM043 (8 shells). Locality no. 13: CUMZ-CM127 (2 shells), CUMZ-CM118 (2 shells). Locality no. 10: CUMZ-CM062 (3 shells; Fig. 6E ), CM063 (1 shell), CUMZ-CM064 (2 specimens in ethanol). The snails were found to live on the ground among leaf litter.

Distribution.

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

Remarks.

Opisthoporus bernardii was originally described from “Siam” [Thailand], and it has been reported from Cambodia ( Fischer 1973a) and Laos ( Inkhavilay et al., 2019). The diagnostic characters of this species are the depressed helicoid shell, with thick or thin periostracum, circular aperture, and a short to long sutural tube (accessory breathing device) located just behind an apertural lip. Pfeiffer (1862) provided details of the operculum, which is calcareous and has a multi-spiral plate-like shape, while the operculum of Rhiostoma is thick calcareous and has a multi-spiral cup shape ( Egorov 2009).

Figures

Figure 6. A Georissa monterosatiana Godwin-Austen & Neville, 1879 B Georissa carinata Sutcharit & Jirapatrasilp, sp. nov. C Cyclophorus amoenus (Pfeiffer, 1854) D Cyclophorus paviei Morlet, 1885 E Opisthoporus bernardii (Pfeiffer, 1862) and F Lagocheilus landesi (Morlet, 1885).