| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Cyclocardia astartoides (Martens, 1878) |
Southern Pacific and the Antarctic | 3.5 | |
| Cyclocardia bailyi (Burch, 1944) |
Bumpy Cyclocardia | East Pacific | |
| Cyclocardia barbarensis (Stearns, 1891) |
Santa Barbara Cyclocardia | East Pacific | |
| Cyclocardia borealis (Conrad, 1831) |
Northern Cyclocardia | Arctic and Northwest Atlantic | |
| Cyclocardia compressa (Reeve, 1843) |
Southwest Atlantic and Southeast Pacific | ||
| Cyclocardia congelascens (Melvill & Standen, 1912) |
Western Atlantic | 0.4 | |
| Cyclocardia gouldii (Dall, 1903) |
Gould Cyclocardia | East Pacific | |
| Cyclocardia incisa (Dall, 1903) |
Cut Cyclocardia | East Pacific | |
| Cyclocardia moniliata (Dall, 1903) |
Western Atlantic | ||
| Cyclocardia novangliae (Morse, 1869) |
New England Cyclocardia | North America | |
| Cyclocardia ovata (Riabinina, 1952) |
Ovate Cyclocardia | East Pacific and the Arctic | |
| Cyclocardia spurca Sowerby, 1833 |
Southeast Pacific | ||
| Cyclocardia thouarsii (d'Orbigny, 1846) |
Southeast Pacific and Western Atlantic | 0.4 | |
| Cyclocardia umnaka (Willett, 1932) |
Aleutian Cyclocardia | East Pacific | |
| Cyclocardia velutina (Smith, 1881) |
Southeast Pacific and Southwest Atlantic |