Pilsbryoconcha lemeslei (Morelet, 1875)

Ng, Ting Hui, Jeratthitikul, Ekgachai, Sutcharit, Chirasak, Chhuoy, Samol, Pin, Kakada, Pholyotha, Arthit, Siriwut, Warut, Srisonchai, Ruttapon, Hogan, Zeb S. & Ngor, Peng Bun, 2020, Annotated checklist of freshwater molluscs from the largest freshwater lake in Southeast Asia, ZooKeys 958, pp. 107-141 : 107

Pilsbryoconcha lemeslei (Morelet, 1875) Fig. 3J

Anodonta lemeslei Morelet, 1875: 328, pl. 14, fig. 1. Type locality: “Cambodge”.

Pilsbryoconcha lemeslei : Brandt 1974: 263, pl. 18, fig. 22.

Material examined.

MUMNH.UNI.2669

Distribution and habitat.

Tributary of Tonle Sap Lake near Preah Tis Bridge in Chi Kraeng District, Siem Reap Province (locality no. 13); in soft muddy substrate of still water.

Remarks.

This species is rare and known only from few places in Thailand, Laos, Cambodia and Vietnam ( Brandt 1974; Do et al. 2018). It differs from other Pilsbryoconcha species by having a narrower and elongated shell, and more rounded posterior end.

Figures

Figure 3. Freshwater bivalves of the Tonle Sap basin, Cambodia (Pharidae and Unionidae) A Novaculina siamensis B Bineurus mouhotii C Contradens contradens D Ensidens ingallsianus E Hyriopsis bialata F Hyriopsis delaportei G Monodontina cambodjensis H Physunio micropterus I Pilsbryoconcha linguaeformis J Pilsbryoconcha lemeslei and K Scabies mandarinus. Scale bars: 10 mm, unless stated otherwise. Photographs by K Macharoenboon.