Clithon faba (Sowerby, 1836)

Figs 3 O–R

Neritina faba Sowerby II, 1836: part 90, fig. 10.

Clithon faba: Okutani 2000: 107 –108, pl. 54, fig. 35; Thach 2005: 38, pl. 8, fig. 15; Tan & Clements 2008: 491, figs 3-35, 3-36; Lozouet & Plaziat 2008: 96 –97, pl. 12, figs 7–8; Fukumori & Kano 2014, 217; Zvonareva et al. 2015: 8, fig. 3(7). Neritina sp.: Zvonareva et al. 2015: 8.

Material examined. Dam Bay, mangrove plantation, Nha Phu, about 70 specimens.

Abundance. Common.

Measurements. Up to 19 mm (Tan & Clements 2008).

Ecological notes. Development with free swimming veliger (Fukumori & Kano 2014).

A brackish estuarine species. Occurs on sandy banks of mangrove streams, sand, stones, and concrete surfaces of drainage canals near sea in intertidal zone (Tan & Clements 2008).

In studied sites it was found on sand banks of mangrove streams and in the canals in upper and mid-intertidal zones in mangrove plantation and in natural mangroves, co-occurs with Clithon oualaniense .

Relation to mangroves. Eurybiotic.

Distribution in Vietnam. Central coast (Hylleberg 2000; Thach 2005).

General distribution. From Japan to Singapore (Okutani 2000; Tan & Clements 2008).