| Abbrev | Name | Spec | Type | Locality |
|---|---|---|---|---|
| YKN | YUKON,MEX[144][1281]; | TR.AE | S | MEX |
| YK | YUKON[3733] | TR.AE | W | USA |
| N84,2 | YUKICHABO[1281] | TR.AE | JPN | |
| YUG | YUGOSLAVIA[1281]; | TR.AE | TK | |
| JBJ | YUBILEINAYA[1281] | TR.DR | W | UKR |
| UB | YUBILEINA[1281]; | TR.AE | BGR | |
| YUAN | YUAN-YANG[3692]; | TR.DR | S | MEX |
| YUAN5 | YUAN-5[1281]; | TR.DR | S | MEX |
| YUAN4 | YUAN-4[1281]; | TR.DR | S | MEX |
| YUAN3 | YUAN-3[1281]; | TR.DR | S | MEX |
| YUAN2 | YUAN-2[1281]; | TR.DR | S | MEX |
| YUAN1 | YUAN-1[1281]; | TR.DR | S | MEX |
| YU9 | YU-9[1281]; | TR.DR | S | MEX |
| YU8 | YU-8[1281]; | TR.DR | S | MEX |
| YU7 | YU-7[1281]; | TR.DR | S | MEX |
| YU6 | YU-6[1281]; | TR.DR | S | MEX |
| YU5 | YU-5[1281]; | TR.DR | S | MEX |
| YU4 | YU-4[1281]; | TR.DR | S | MEX |
| YU3 | YU-3[1281]; | TR.DR | S | MEX |
| YU2 | YU-2[1281]; | TR.DR | S | MEX |