Nuculida
| Nuculida | |
|---|---|
 | |
| Nucula nucleus | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Bivalvia |
| Order: | Nuculida Dall, 1889 |
| Superfamily: | Nuculoidea Gray, 1824 |
| Families | |
| Synonyms | |
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Nuculida is an order of small saltwater clams, marine bivalve mollusks, within the subclass Protobranchia. "Nuculida" is sometimes spelled "Nuculoida". This order contains a single superfamily, Nuculoidea, which encompasses two families, the extant Nuculidae and the extinct Praenuculidae. Clams in the family Nuculidae are commonly known as nut clams.