Species Account

Hyotissa mcgintyi (Harry, 1985)

Ostreoidea : Gryphaeidae

Tebble name:
Smith & Heppell name:

To size: To 100mm. Shell Structure: Thin but robust shell, fragile at the edges. Magnified the external rim of the internal shell has a lot of tiny holes to give a honeycomb structure. Equivalve: Equivalve. Equilateral: Almost equilateral. Tumidity: Flattened. Outline: Irregular circle to D-shaped. Left valve cemented to hard surface.

Sculpture: Irregular lumps and bumps. Sometimes with short spines. Margin: Irregular crinkles, fragile. Ligament: Triangular, alivincular ligament. Hinge: Dorsal margin often almost straight. Anterior and poster of ligament are crural teeth, more numerous in adults. Pallial Musculature: Monomyarian, posterior adductor muscle is circular. Colour: External cream to pink, internal white, edges of internal are cream.

Distribution & Ecology

Described from eastern Florida but is found from North Carolina, Cuba, Bahamas and Brazil.

In Britain and Ireland it has been at Chesil Beach, Dorset.

Depth Range

Additional Information & Related Species

Related Species


Listed are literature citing Hyotissa mcgintyi (Harry, 1985). Reference containing the species Type Description is highlighted.

Harry, H.W. 1985. Synopsis of the Supraspecific classification of Living Oysters (Bivalvia: Gryphaeidae and Ostreidae). The Veliger. 28(2): 121-158.


  • Conchological Society of Great Britain & Ireland
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  • MarBEF
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Record last modified: 10/03/2021