Anadara trapezia

Anadara trapezia
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Bivalvia
Subclass: Pteriomorphia
Order: Arcoida
Superfamily: Arcoidea
Family: Arcidae
Genus: Anadara
Species: A. trapezia
Binomial name
Anadara trapezia
Deshayes, 1840

Sydney cockle (NSW), or ark cockle (Queensland), Anadara trapezia, is an estuarine filter-feeding bivalve. Its calcareous, heavily-ribbed, shell can grow to approximately 7 to 8 cm across. Its current 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 and further reading

  • 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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