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Crested oyster, Ostreola equestris. Photograph Jax Shells.

Species Name: Ostreola equestris Say, 1824
Common Name: Crested Oyster
Synonymy: Dendostrea equestris Say, 1834
  1. TAXONOMY

    Kingdom Phylum/Division Class: Order: Family: Genus:
    Animalia Mollusca Bivalvia Ostreoida Ostreidae Ostreola

    Species Description

    Ostreola equestris is a member of the family Ostreidae. The shell of the crested oyster is thick, flattened, and appearing ruffled along one side of the top edge. It usually bears concentric ridges. The exterior color of the shell is dirty white to gray while the interior is bright white. Unlike Crassostrea virginica, the crested oyster has not been well studied. For information regarding the life history and population biology of this oyster family see C. virginica.

  2. HABITAT AND DISTRIBUTION

    Regional Occurrence

    The crested oyster is found in the estuaries along the eastern seaboard of the United States and the Gulf of Mexico.

    IRL Distribution

    Ostreola equestris occurs in oyster beds and other hard substrata, e.g., mangrove prop roots in the Indian River Lagoon.

  3. LIFE HISTORY AND POPULATION BIOLOGY

    No information is available at this time

  4. PHYSICAL TOLERANCES

    No information is available at this time

  5. COMMUNITY ECOLOGY

    Trophic Mode

    Ostreola equestris is a filter feeder.

    Parasites

    The crested oyster is a host for the parasite Bonamia perspora (Carnegie et al. 2006).

  6. ADDITIONAL INFORMATION

    No information is available at this time

  7. REFERENCES

    Carnegie RB, Burreson EM, Mike HP, Stokes NA, Audemard C, Bishop MJ, and CH Peterson. 2006. Bonamia perspora n. sp. (Haplosoridia), a parasite of the oyster Ostreola equestris , is the first Bonamia species known to produce spores. The Journal of Eukaryotic Microbiology 53:232-245.

    ITIS. Integrated Taxonomic Information System. Available online.

Report by: Melany P. Puglisi, Smithsonian Marine Station
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Page last updated: October 1, 2008

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