| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Mactromeris catilliformis (Conrad, 1867) |
Dish surfclam | East Pacific | |
| Mactromeris hemphillii (Dall, 1894) |
Hemphill surfclam | East Pacific | |
| Mactromeris polynyma (Stimpson, 1860) |
Arctic surfclam | Northeast Pacific and the Arctic | 16 |