Neripteron cornucopia ( Benson, 1836 )

Mustapha, Nurshahida, Baharuddin, Nursalwa, Tan, Siong Kiat & Marshall, David J., 2021, The neritid snails of Brunei Darussalam: their geographical, ecological and conservation significance, Ecologica Montenegrina 42, pp. 45-61 : 53-55

* Neripteron cornucopia ( Benson, 1836)

Figs. 3G–H and 4J Neritina cornucopia Benson, 1836: 748 . Neritina cornucopia – Tan & Clements, 2008: 489, figs. 3-27, 3-28. Neripteron (Dostia) cornucopia – Eichhorst, 2016a: 359, pl. 83.

Material. UBDM.7.00090. Sample was collected from SK.

Abundance. Intermediate.

Habitat. In the estuaries. Brackish water.

Local distribution. SK.

Ecology and conservation. The species can be found locally alongside Nerip. violaceum but is less common. Nerip. cornucopia is also exposed to highly acidic environmental condition and faces shell dissolution ( Proum et al. 2018). Higher conservation concern than that of Nerip. violaceum because Nerip. cornucopia is distinctly less common.

Biogeographical distribution. SB in Western Coral Triangle and VN and SG in Sunda Shelf. Generally distributed from India to Japan and the Philippines ( Eichhorst 2016a).

1 mm

* Neripteron spirale (Reeve, 1855)

Figs. 3I–J and 4N

Neritina spiralis Reeve, 1855 (in 1855–1856): Species 99, plate xxiii, figs. 99a-99b.

Neritina sulculosa – Tan & Clements, 2008: 490, figs. 3-31, 3-32.

Neripteron (Pseudonerita) spirale – Eichhorst, 2016a: 382, pl. 97.

Material. Unassigned.

Abundance. Rare (one specimen collected).

Habitat. In the estuaries. Brackish water.

Local distribution. SK.

Ecology and conservation. This species appears to have a preference for flowing water in the upper reaches of canals and streams with lower salinity, thus it may more commonly occur in freshwater. It is small and can be easily overlooked or confused with juveniles of other congeners.

Biogeographical distribution. Generally distributed in Thailand and Malaysia, and possibly Indonesia ( Eichhorst 2016a).