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echinoids
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| Phylum Echinodermata > Class Echinodea > Order Clypeasteroida |
| Laganum
sand dollar Laganum depressum Family Laganidae updated Mar 09 Where seen? This rose pink sand dollar is rarely seen. Usually on soft silty sand. The ones seen on Sentosa were on a site that has since been reclaimed for the Sentosa Integrated Resort. Features: Body diameter 4-6cm. Somewhat pentagonal rather than circular. On the upperside it is thick at the edges and at the centre, and thinner elsewhere, creating a shallow circular depression around the centre. The petalloid is obvious and large. Spines at the edges of the body are longer. The underside has long spines, the anus is on the underside. A pale rose pink or grey. According to Lane, this is an uncommon species that was only found in trawl hauls in the Southern islands. He also observed some at Pulau Semakau, using their spines to move over soft sediments and not for burrowing. Status and threats: This rare sand dollar is listed as 'Vulnerable' on the Red List of threatened animals of Singapore. |
 East Coast, Nov 08  East Coast, Nov 08 |
 Underside |
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Laganum sand dollars on Singapore shores
 East Coast, Nov 08 |
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 Underside |
 The anus |
 Mouth in the centre |
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