| Nominal Species (n = 7) | Present allocation (n = 7) | Ref. |
|---|---|---|
| Spatangus californicus Clark, 1917 | Spatangus californicus | 19 |
| Maretia cordata Mortensen, 1948 | Maretia cordata | 81020 |
| Nacospatangus depressus Clark, 1917 | Nacospatangus depressus | 19 |
| Spatangus inermis Mortensen, 1913 | Spatangus inermis | 3477 |
| Gymnopatagus magnus Agassiz & Clark, 1907 | Gymnopatagus magnus | 81020 |
| Spatangus mathesoni McKnight, 1968 | Spatangus mathesoni | 3477 |
| Spatangus multispinus Mortensen, 1925 | Spatangus multispinus | 88950 |