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Anadara trapezia
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Bivalvia
Order:	Arcida
Family:	Arcidae
Genus:	Anadara
Species:	A. trapezia
Binomial name
Anadara trapezia Deshayes, 1840

Anadara trapezia, the Sydney cockle (NSW), or ark cockle (Queensland), is an estuarine filter-feeding bivalve. Its calcareous, heavily ribbed shell can grow to approximately 7 to 8 cm (2.8 to 3.1 in) across. Its range is along the east coast of Australia, from Queensland to Victoria. It has previously existed in Western Australia, South Australia, and the coast of New Zealand during the Middle Holocene. It has been used as a bioindicator/indicator species to study levels of the metals selenium, copper and cadmium.

References

• Murray-Wallace, C.V., Beu, A.G., Kendrick, G.W., Brown, L.J., Belperio A.P. and Sherwood, J.E. (2000) Palaeoclimatic implications of the occurrence of the arcoid bivalve 'Anadara trapezia' (Deshayes) in the Quaternary of Australasia. Quaternary Science Reviews 19 559-590
• Jolley, D. F., Maher, W. A. and Kyd, J. (2004) Selenium accumulation in the cockle 'Anadara trapezia'. Environmental Pollution 132:2 203-212

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• Bivalves of Australia
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• Bivalves described in 1840
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