| Page last updated
Thu 17 July 2025 |
The Freshwater Mussels (Unionoida) of the World (and other less consequential bivalves)
FM(U)otW(aolcb) is the web version of the MUSSEL Project Database. Follow the links to browse the data or use the custom Google search field. Either way, you win!
Updated Table 4: Species richness and subregional endemism
by geography and family| Region | Unionoida | UN | MA | HY | ET | MY | IR | | global | 1020 | 816 | 15 | 93 | 4 | 53 | 39 | | North America | 307 | 302 | 5 | — | — | — | — | | NA1 | 13 (0) | 13 (0) | — | — | — | — | — | | NA2 | 150 (95) | 148 (94) | 2 (1) | — | — | — | — | | NA3 | 64 (36) | 63 (36) | 1 (0) | — | — | — | — | | NA4 | 157 (105) | 155 (103) | 2 (2) | — | — | — | — | | NA5 | 7 (5) | 6 (5) | 1 (0) | — | — | — | — | | Central America | 96 | 89 | — | — | — | 7 | — | | CA1 | 96 (89) | 89 (85) | — | — | — | 7 (4) | — | | South America | 115 | — | — | 64 | 2 | 49 | — | | SA1 | 13 (5) | — | — | 1 (1) | 1 (1) | 11 (3) | — | | SA2 | 33 (18) | — | — | 15 (9) | — | 18 (9) | — | | SA3 | 37 (12) | — | — | 14 (5) | 1 (0) | 22 (7) | — | | SA4 | 17 (4) | — | — | 8 (2) | — | 9 (2) | — | | SA5 | 63 (42) | — | — | 39 (32) | 1 (0) | 23 (10) | — | | SA6 | 3 (2) | — | — | 2 (2) | — | 1 (0) | — | | Afrotropics | 81 | 41 | — | — | 1 | — | 39 | | AF1 | 26 (16) | 13 (11) | — | — | 1 (0) | — | 12 (5) | | AF2 | 18 (8) | 4 (2) | — | — | 1 (0) | — | 13 (6) | | AF3 | 36 (29) | 19 (19) | — | — | 1 (0) | — | 16 (10) | | AF4 | 16 (11) | 5 (4) | — | — | 1 (0) | — | 10 (7) | | AF5 | 6 (1) | 2 (1) | — | — | 1 (0) | — | 3 (0) | | AF6 | 2 (1) | 1 (1) | — | — | 1 (0) | — | — | | North Eurasia | 47 | 43 | 4 | — | — | — | — | | EU1 | 35 (27) | 32 (25) | 3 (2) | — | — | — | — | | EU2 | 16 (11) | 15 (10) | 1 (1) | — | — | — | — | | EU3 | 3 (0) | 3 (0) | — | — | — | — | — | | East Asia | 361 | 353 | 7 | — | 1 | — | — | | AS1 | 3 (0) | 2 (0) | 1 (0) | — | — | — | — | | AS2 | 29 (16) | 28 (15) | 1 (1) | — | — | — | — | | AS3 | 28 (19) | 26 (18) | 2 (1) | — | — | — | — | | AS4 | 86 (62) | 84 (60) | 2 (2) | — | — | — | — | | AS5 | 149 (126) | 147 (124) | 2 (2) | — | — | — | — | | AS6 | 31 (24) | 31 (24) | — | — | — | — | — | | AS7 | 82 (77) | 81 (76) | — | — | 1 (1) | — | — | | Australasia | 31 | 2 | — | 29 | — | — | — | | AU1 | 14 (11) | — | — | 14 (11) | — | — | — | | AU2 | 7 (5) | — | — | 7 (5) | — | — | — | | AU3 | 11 (9) | 2 (2) | — | 9 (7) | — | — | — | | AU4 | 3 (3) | — | — | 3 (3) | — | — | — |
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