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echinoids
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photo index
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| Phylum Echinodermata > Class Echinodea > Order Clypeasteroida |
| Keyhole
sand dollar Echinodiscus truncatus Family Astriclypeidae updated Feb 09 Where seen? This large sand dollars with slots is sometimes seen sandy areas near seagrasses on Chek Jawa and Changi. It is not found in large groups like the Cake sand dollar, usually alone. It was previously known as Echinodiscus bisperforatus. Features: Body diameter about 10cm, with a pair of slots in the body. Smaller ones have not been encountered. The flower-like petalloid is obvious even in living specimens. Usually reddish-purple, sometimes yellowish brown. Status and threats: This sand dollar is listed as 'Vulnerable' in the Red List of threatened animals of Singapore. An uncommon species restricted to very few sites mainly in the Pulau Ubin-Pulau Tekong area, it is threatened by habitat loss due to coastal development. |
 Upperside of living sand dollar Chek Jawa, Jul 08 |
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Keyhole sand dollars on Singapore shores
 Chek Jawa, Nov 03 |
 Upperside of dead sand dollar. |
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 Underside of dead sand dollar. |
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