Filopaludina martensi cambodjensis (Mabille & Le Mesle, 1866) Fig. 5E

Paludina cambodjensis Mabille & Le Mesle, 1866: 135, pl. 7, fig. 4. Type locality: "Moth-Kasa, dans les marais".

Filopaludina (Siamopaludina) martensi cambodjensis: Brandt 1974: 28, pl. 2, fig. 24.

Material examined.

CIFI.MOL.033, CIFI.MOL.041, ZRC.MOL.015715, ZRC.MOL.015716, ZRC.MOL.015717, ZRC.MOL.015718, ZRC.MOL.015719, ZRC.MOL.015720, ZRC.MOL.015721, ZRC.MOL.015722, ZRC.MOL.015723, ZRC.MOL.015724, ZRC.MOL.015725, ZRC.MOL.015726, ZRC.MOL.015727, ZRC.MOL.015728, ZRC.MOL.015729, ZRC.MOL.015730, ZRC.MOL.015731, ZRC.MOL.015732, ZRC.MOL.015733.

Distribution and habitat.

Tonle Sap River and Lake, and surrounding watershed including rivers, irrigation ponds and paddy fields (locality no. 1, 2, 3, 5, 8, 9, 10, 11, 12, 13, 16, 17, 19, 20, 21, 22, 24, 32, 37, 38, 40, 42 and 44).

Remarks.

Filopaludina martensi cambodjensis is said to be lacking in spiral ridges compared to Filopaludina martensi martensi (Frauenfeld, 1865) (see Brandt 1974), but our specimens showed some variation, with some displaying ridges. The validity of the various Filopaludina martensi subspecies have not been investigated in detail to date. The species is sold in local markets, but did not appear to be harvested in as large quantities as Mekongia rattei (Crosse & Fischer, 1876), and its annual harvest at five main landing points in Kampong Chhnang Province has previously been recorded to be 68 tonnes, only ca. 1/5th of the Mekongia swainsoni (Lea, 1856) that were obtained (Ngor et al. 2016).