Note: This is a mixed bag of structures for which I didn't find a proposed ISBT name at the time of entering. It may include non-existent structures, existent structures considered obsolete by the ISBT, structures overlooked by ISBT, recently described structures, and structures for which I just didn't find the time to enter the proposed ISBT name.
| Designation | Haplotype | Phenotype | Cluster | Structure | First mention | Definitive publication |
| CO(A168T) | Colton | main cluster | CO(A168T) | 2009 | ||
| Co(A45T) | Colton | Co(b+) Co(a-) | main Cluster | Co(A45T) | 2010 | 2010 |
| CO(V50M) | Colton | main cluster | CO(V50M) | 2015 | ||
| CO*N.02 | Colton | Co:-3 Co(a-) Co(b-) | main cluster | CO(307insT) | 1994 | 1994 |