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| shelled snails text index | photo index |
| Phylum Mollusca > Class Gastropoda > Family Neritidae |
| Black-mouth
nerite snail Dostia cornucopia Family Neritidae updated Jan 11 Where seen? This sturdy nerite are sometimes seen in our mangroves, near mud lobster mounds. The study by Tan & Clements (2008) found this snail usually submerged; on mud, plant matter (e.g., fallen leaves and braches in stagnant pools), on and under stones in streams, and on concrete banks of drains. They found the snails on our Northern shores as well as at Berlayar Creek. Features: About 2cm. Shell sturdy and rounded with a sunken spire. When alive, the shell is covered with a periostracum and usually covered with silt and algae. But the shell is white with purplish axial lines and “tent”markings, spiral bands often devoid of markings. The flat underside shades of grey or very dark grey throughout with a pale or orange rim. Small white teeth near the shell opening usually along the entire length. The operculum is smooth, similar in colour to the underside with an orangish-red horn border. The living animal is black. |
 Pulau Semakau, Mar 09 |
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 Close up of shell opening and operculum. |
 Underside. |
 Sungei Pandan, Jun 09 |
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 Sungei Pandan, Jan 11  |
 Mandai, Mar 11  |
 Kranji Nature Trail, Jan 11 |
 Kranji Nature Trail, Jan 11  |
 Laying egg capsules. Kranji Nature Trail, Jan 11 |
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