| Nominal Species (n = 16) | Present allocation (n = 16) | Ref. |
|---|---|---|
| Mesosignum admirandum Menzies & Frankenberg, 1967 | Mesosignum admirandum | 19 |
| Mesosignum ansatum Menzies & Frankenberg, 1967 | Mesosignum ansatum | 19 |
| Mesosignum antarcticum Schultz, 1979 | Mesosignum antarcticum | 19 |
| Mesosignum asperum Menzies & Frankenberg, 1967 | Mesosignum asperum | 19 |
| Mesosignum brevispinis Birstein, 1963 | Mesosignum brevispinis | 19 |
| Mesosignum elegantulum Birstein, 1963 | Mesosignum elegantulum | 19 |
| Bermudasignum frankenbergi George, 2003 | Bermudasignum frankenbergi | 3113 |
| Mesosignum kohleri Menzies, 1962 | Mesosignum kohleri | 19 |
| Mesosignum latum Birstein, 1970 | Mesosignum latum | 19 |
| Mesosignum macrum Menzies & Frankenberg, 1967 | Mesosignum macrum | 19 |
| Mesosignum magnadens Menzies & Frankenberg, 1967 | Mesosignum magnadens | 19 |
| Mesosignum multidens Menzies & Frankenberg, 1967 | Mesosignum multidens | 19 |
| Mesosignum truncatum Menzies & George, 1972 | Mesosignum truncatum | 19 |
| Mesosignum usheri Menzies, 1962 | Mesosignum usheri | 19 |
| Mesosignum vitjazi Birstein, 1963 | Mesosignum vitjazi | 19 |
| Mesosignum weddellensis Choudhury & Brandt, 2004 | Mesosignum weddellensis | 3113 |