| Abbrev | Name | Spec | Type | Locality |
|---|---|---|---|---|
| MRSA | MURSA[133]; | TR.AE | W | YUG |
| MRV,3 | MORAVA[133]; | TR.AE | W | YUG |
| MRV,2 | MIRONOVSKAYA | TR.AE | W | UKR:MIRONOVKA |
| MSA | MARNISSA[1281]; | TR.DR | ESP | |
| MSLV | MOSLAVKA[1281]; | TR.AE | W | YUG |
| MSOL | MARISOL[145][144][1281]; | TR.AE | S | CHL |
| MST,2 | MARISTELLA; | TR.DR | S | ITA |
| MSY,1 | MERSEY[219][1281]; | TR.AE | S | AUS |
| MT,1 | MARTE[115] | TR.DR | S | MEX |
| MTA,1 | MENTANA[145][1281]; | TR.AE | ITA | |
| MTA,2 | MALTA | TR.DR | ||
| MTB | MANITOBA[145] | TR.AE | CAN | |
| MTC | MITACORE[145][1281]; | TR.AE | S | BRA |
| MTM | MINTER[1322] | TR.AE | W | USA |
| MTO,1 | MATONG[176]; | TR.AE | S | AUS |
| MTO,2 | MONTANO | TR.DR | ||
| MTTE | MOUETTE[115][1281]; | TR.DR | S | MEX |
| MU | MERGU[115] | TR.DR | S | MEX |
| MUA | MURCIA[1281]; | TR.DR | ESP | |
| MULT11 | MULTIPLICATION-11[1281]; | TR.AE | S | BRA |