Monoplex vespaceus (Lamarck, 1822)

Figs 7 V–W

Triton vespaceum Lamarck, 1822: 185 .

Cymatium (Monoplex) vespaceum: Beu 1998: figs 23k, 29a–i, 30a–k, 97–100 (full synonymy); Okutani 2000: 286–287, pl. 142, fig. 16; Poppe 2008a: 646–647, pl. 268, figs 1–5, 7.

Material examined. Dam Bay, mangrove plantation, 7 specimens.

Abundance. Uncommon.

Measurements. Up to 60 mm (Beu 1998).

Ecological notes. It was found on clusters of oysters on stems of young Rhizophora in lower intertidal zone.

Relation to mangroves. Eurybiotic.

Distribution in Vietnam. Central coast.

General distribution. Throughout much of the IWP (Beu 1998).