| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Heptacyclus brunneus (Johansson, 1896) |
Arctic, Northern Pacific and Northern Atlantic | ||
| Heptacyclus scorpii (Malm, 1863) |
Arctic and Northern Atlantic | ||
| Heptacyclus virgatus (Oka, 1910) |
Arctic and Northern Pacific |