Table 2.
Numbers of dytiscid species of different zoogeographical origins listed for 10 sub-basins of Mongolia.
| Bio-geographical ranges | AOB | CAIB | POB | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| SRB | ShRB | BRB | DGLB | GRB | TRB | VLRB | KhGRB | KhRB | ORB | |
| Arctic origin | 19 | 7 | 1 | 13 | 5 | 4 | 6 | 2 | 5 | 4 |
| Boreal | 13 | 5 | 2 | 9 | 3 | 5 | 4 | 2 | 3 | 5 |
| Holarctic | 1 | 1 | 0 | 1 | 0 | 1 | 2 | 0 | 0 | 0 |
| Turanian | 5 | 3 | 0 | 4 | 3 | 2 | 2 | 0 | 1 | 1 |
| Mediterranean | 0 | 0 | 0 | 0 | 2 | 1 | 0 | 0 | 0 | 0 |
| Oriental | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Palearchearctic | 2 | 0 | 0 | 2 | 1 | 0 | 1 | 0 | 1 | 1 |
| Palearctic | 32 | 4 | 1 | 10 | 7 | 7 | 5 | 0 | 4 | 2 |
| Steppe zone | 7 | 1 | 1 | 6 | 5 | 4 | 1 | 5 | 3 | 2 |
| Overall species | 79 | 21 | 5 | 45 | 26 | 23 | 21 | 9 | 17 | 16 |
Abbreviations: AOB-Arctic Ocean Basin: SRB-Selenge River Basin, ShRB-Shishkhed River Basin, BRB-Bulgan River Basin. CAIB-Central Asian Inland Basin: DGLB- Depression of Great Lakes Basin, GRB-Gobi River Basin, TRB-Tes River Basin, VLRB-Valley of Lakes River Basin. POB-Pacific Ocean Basin: KhGRB-Khalkh Gol River Basin, KhRB-Kherlen River Basin, ORB-Orkhon River Basin.