Sphaeriidae

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Sphaeriidae
Sphaerium corneum.jpg
Four shells of Sphaerium corneum. Scale bar is in mm
Scientific classification
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Sphaeriidae

Deshayes, 1855 (1820)
Synonyms

Cycladidae, Rafinesque 1820[1][2]

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The Sphaeriidae are a family of small to minute freshwater bivalve molluscs, in the order Veneroida; this family also includes the clams formerly placed in the Pisidiidae. In the US, they are commonly known as pea clams or fingernail clams.[3][4]

Genera

Genera in the family Sphaeriidae include:

Biology and ecology

Sphaeriidae are hermaphrodites with internal fertilization. Developing young are incubated within their mother (ovoviviparity), and newborn clams look like miniature copies of the adults.[4]

Parasites and/or predators include the Sciomyzidae.

References

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  3. Heard, William H. 1965. Comparative life histories of North American pill clams (Sphaeriidae: Pisidium). Malacologia, 2: 381-411.
  4. 4.0 4.1 Heard, William H. 1977. Reproduction of fingernail clams (Sphaeriidae: Sphaerium and Musculium). Malacologia, 16: 421-455.