Mekongia rattei (Crosse & Fischer, 1876)

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

Mekongia rattei (Crosse & Fischer, 1876) Fig. 5G

Paludina rattei Crocsse & Fischer, 1876: 317. Type locality: "Stung Chinit, Cambodia".

Mekongia rattei : Brandt 1974: 44-45, pl. 3, figs 51, 52.

Material examined.

CIFI.MOL.042, MUMNH.VIV.001, MUMNH.VIV.002, MUMNH.VIV.003, ZRC.MOL.015744, ZRC.MOL.015745, ZRC.MOL.015743.

Distribution and habitat.

Tonle Sap Lake; Chi Kraeng River and Sreng River in Siem Reap Province; Phumi Phsar River in Kampong Chhnang Province (locality no. 7, 8, 11, 13, 16, 20, 24, 27, 36, 37 and 39).

Remarks.

Mekongia rattei is sold in local markets surrounding the Lake. This species along with Corbicula spp. are commercially harvested from the Lake to be sold locally and exported abroad for human consumption and as animal feed in local poultry farms (Fig. 4B ). Another record of Mekongia from the Tonle Sap basin and surrounding drainages is Mekongia swainsoni (see Brandt 1974; Ngor et al. 2018d). Mekongia rattei differs from Mekongia swainsoni by its larger size and conic shape of spire.

Figures

Figure 4. Freshwater mollusc fisheries at the Tonle Sap Lake, Cambodia. Small-scale harvesting of freshwater molluscs A Corbicula spp. and B Mekongia rattei, at open areas of the Lake. Freshwater molluscs C Corbicula spp. and D Pila spp., being sorted and packed at main landing sites around the Lake. Photographs by A Pholyotha (A, B), TH Ng (C), PB Ngor (D).

Figure 5. Freshwater gastropods of the Tonle Sap basin, Cambodia A Pila gracilis B Pila pesmei C Pila virescens D Pomacea maculata E Filopaludina martensi cambodjensis F Idiopoma umbilicata G Mekongia rattei H Trochotaia trochoides I Bithynia siamensis goniomphalus J Wattebledia siamensis K Anentome cambojiensis L Anentome helena M Sulcospira housei N Melanoides tuberculata O Indoplanorbis exustus and P Radix rubiginosa. Scale bars: 10 mm, unless stated otherwise. Photographs by TH Ng.