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| shelled snails text index | photo index |
| Phylum Mollusca > Class Gastropoda > Family Planaxidae |
| Planaxis
snail Planaxis sulcatus Family Planaxidae updated Aug 10 Where seen? This large 'groovy' snail with neat spirals in elegant grey or black is seen in groups on large boulders and seawalls. Commonly seen especially on our Southern shores. Features: 2-2.5cm. Shell with strong squarish spiral cords (Sulcus means 'grooved'). Colour blackish to cream sometimes with white or yellowish spots. Shell opening wide with grooves on the inner surface. Operculum dark coloured and is made of a horny material. The females have a special brood pouch in the foot where the embryos are reared before they are released into the water. |
 Sisters Islands, Feb 06 |
 Kusu Island, May 07 |
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 Close up of shell opening and operculum. |
Grooved planaxis snails on Singapore shores
 Pulau Hantu, Feb 07  |
 Pulau Hantu, Feb 07  |
 Pulau Sekudu, Feb 07  |
more photos of grooved planaxis snails on Singapore shores
northern shores
southern shores part 1 | part 2
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References
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Graham Brash, Singapore. 145 pp.|
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