Nerita planospira Anton, 1838

Figs 3 E–F

Nerita planospira Anton, 1838: 30 .

Nerita (Theliostyla) planospira: Okutani 2000: 104 –105, pl. 52, fig. 14.

Nerita planospira: Poppe 2008a: 272 –273, pl. 81, fig. 3; Tan & Clements 2008: 486, figs 2-13, 2-14; Lozouet & Plaziat 2008: 106 –107, pl. 17, figs 11–12.

Material examined. Dam Bay, natural mangrove, 5 specimens.

Abundance. Uncommon.

Measurements. Up to 29 mm (Tan & Clements 2008).

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

Found on trunks and roots of mangrove trees, on rocks and dead wood from sea edge to the upper estuary, mainly in peripheral belt but also within internal mangroves (Lozouet & Plaziat 2008; Tan & Clements 2008; Frey 2010).

In studied sites it was found on rocks and Rhizophora pneumatophores.

Relation to mangroves. Predominantly mangrove-associated.

Distribution in Vietnam. Central coast.

General distribution. From Indo-Malayan core to the Ryu Kyu Is (Lozouet & Plaziat 2008).