| Glycymerididae | |
|---|---|
| |
| One valve of a shell of Tucetona laticostata | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Bivalvia |
| Order: | Arcida |
| Superfamily: | Arcoidea |
| Family: | Glycymerididae Dall, 1908 |
| Genera | |
|
4, see text | |
| Synonyms | |
Glycymerididae, often misspelled as Glycymeridae, common names dog cockles or bittersweets, is a worldwide family of salt water clams, marine bivalve mollusks in the order Arcida. They are related to the ark clams. This family contains 45 extant species in four genera.