| Abbrev | Name | Spec | Type | Locality |
|---|---|---|---|---|
| MELO7 | MERGULO-7[1281]; | TR.DR | S | MEX |
| MELO8 | MERGULO-8[1281]; | TR.DR | S | MEX |
| MELO9 | MERGULO-9[1281]; | TR.DR | S | MEX |
| MELO | MERGULO[1281]; | TR.DR | S | MEX |
| MERO1 | MERIMETSO-1[1281]; | TR.DR | S | MEX |
| MERO2 | MERIMETSO-2[1281]; | TR.DR | S | MEX |
| MERO3 | MERIMETSO-3[1281]; | TR.DR | S | MEX |
| MERO4 | MERIMETSO-4[1281]; | TR.DR | S | MEX |
| MERO5 | MERIMETSO-5[1281]; | TR.DR | S | MEX |
| MERO6 | MERIMETSO-6[1281]; | TR.DR | S | MEX |
| MERO7 | MERIMETSO-7[1281]; | TR.DR | S | MEX |
| MERO8 | MERIMETSO-8[1281]; | TR.DR | S | MEX |
| MERO | MERIMETSO[1281]; | TR.DR | S | MEX |
| MRT | MERIT[1281]; | TR.AE | USA | |
| MRMC | MERRIMAC[1281]; | USA | ||
| MSN,1 | MESNI[1281]; | TR.AE | FRA | |
| MSP | MESSAPIA[1281]; | TR.AE | ITA | |
| MEXI1 | MEXICALI-1[1281]; | TR.DR | S | MEX |
| MEXI2 | MEXICALI-2[1281]; | TR.DR | S | MEX |
| MEXI | MEXICALI[1281]; | TR.DR | S | MEX |