Species Account

Anomia simplex d’Orbigny, 1853

Anomioidea : Anomiidae

Tebble name:
Smith & Heppell name:

To size: To 44 mm. Shell Structure: Thin shelled, fragile. Equivalve: Inequivalve, lower (right) valve flat, upper valve (left) curved. Equilateral: Roughly equilateral. Tumidity: Not tumid. Outline: Irregular subcircle.

Sculpture: Irregular, uneven externally, takes on sculpture of whatever it is attached to. Margin: Smooth. Ligament: Tiny internal crescent. Hinge: Edentulous. Pallial Musculature: Monomyarian, posterior adductor muscle small. 2 pedal retractor scars one larger than the other. Colour: White to yellow.

Distribution & Ecology

Native range is Eastern Canada and south, through the Caribbean and south to Argentina.

In Britain and Ireland it has been found attached to several items found in Cornwall but it may also have been overlooked, looking similar to our
Anomia ephippium.

Depth Range

Additional Information & Related Species


Listed are literature citing Anomia simplex d’Orbigny, 1853. Reference containing the species Type Description is highlighted.

d’Orbigny, A. 1853. Mollusques. Histoire Physique, Politique et Naturelle de l’île de Cuba 225-380, pls 26-28.


  • Conchological Society of Great Britain & Ireland
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  • MarLIN
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  • BivAToL
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  • Malacological Society
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  • MarBEF
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Record last modified: 27/04/2021