| albania | | unio crassus jonicus | subspecies | 4 | 0 |
| albania | | unio elongatulus | species | 4 | 0 |
| austria | | unio pictorum | species | 2 | 0 |
| china | henan | unio douglasiae | species | 1 | 0 |
| croatia | | unio elongatulus | species | 1 | 0 |
| france | | unio pictorum | species | 3 | 0 |
| france | corse region | unio mancus | species | 3 | 0 |
| france | franche-comte region | unio mancus | species | 26 | 0 |
| germany | schleswig-holstein | unio crassus | species | 10 | 0 |
| iran | | unio pictorum | species | 3 | 0 |
| iraq | | unio delphinus | species | 1 | 0 |
| iraq | | unio elongatulus | species | 2 | 0 |
| iraq | | unio mancus mancus | subspecies | 2 | 0 |
| iraq | sulaymaniyah governorate | unio tigridis | species | 4 | 0 |
| italy | | unio bonellii | species | 22 | 0 |
| italy | | unio elongatulus | species | 37 | 0 |
| italy | | unio mancus | species | 12 | 0 |
| italy | molise region | unio elongatulus | species | 6 | 0 |
| italy | sardinia autonomous region | unio elongatulus | species | 15 | 0 |
| italy | sardinia autonomous region | unio mancus | species | 12 | 0 |
| italy | tuscany region | unio elongatulus | species | 10 | 0 |
| italy | umbria region | unio bonellii | species | 31 | 0 |
| italy | veneto region | unio elongatulus | species | 4 | 0 |
| kazakhstan | east kazakhstan region | unio tumidus | species | 3 | 0 |
| luxembourg | | unio crassus | species | 2 | 0 |
| morocco | | unio foucauldianus | species | 5 | 0 |
| morocco | | unio gibbus | species | 5 | 0 |
| poland | | unio crassus | species | 2 | 0 |
| poland | | unio pictorum | species | 4 | 0 |
| poland | | unio tumidus | species | 11 | 0 |
| portugal | | unio delphinus | species | 8 | 0 |
| portugal | | unio tumidiformis | species | 3 | 0 |
| portugal | beja district | unio tumidiformis | species | 24 | 0 |
| portugal | castelo branco district | unio delphinus | species | 42 | 0 |
| russia | | unio pictorum | species | 8 | 0 |
| russia | adygea republic | unio pictorum | species | 1 | 0 |
| russia | arkhangelsk oblast | unio pictorum | species | 2 | 0 |
| russia | arkhangelsk oblast | unio tumidus | species | 8 | 0 |
| russia | bashkortostan republic | unio pictorum | species | 2 | 0 |
| russia | bashkortostan republic | unio tumidus | species | 1 | 0 |
| russia | karelia republic | unio pictorum | species | 2 | 0 |
| russia | krasnodar krai | unio pictorum | species | 7 | 0 |
| russia | krasnodar krai | unio tumidus | species | 2 | 0 |
| russia | kursk oblast | unio tumidus | species | 8 | 0 |
| russia | novgorod oblast | unio pictorum | species | 6 | 0 |
| russia | perm krai | unio crassus | species | 9 | 0 |
| russia | perm krai | unio tumidus | species | 4 | 0 |
| russia | samara oblast | unio crassus | species | 18 | 0 |
| russia | saratov oblast | unio crassus | species | 9 | 0 |
| russia | saratov oblast | unio pictorum | species | 6 | 0 |
| russia | saratov oblast | unio tumidus | species | 10 | 0 |
| russia | tver oblast | unio crassus | species | 8 | 0 |
| russia | tver oblast | unio pictorum | species | 24 | 0 |
| russia | tver oblast | unio tumidus | species | 16 | 0 |
| russia | tyumen oblast | unio pictorum | species | 10 | 0 |
| russia | voronezh oblast | unio crassus | species | 9 | 0 |
| russia | voronezh oblast | unio tumidus | species | 1 | 0 |
| russia | zabaykalsky krai | unio tumidus | species | 1 | 0 |
| south korea | | unio douglasiae | species | 5 | 0 |
| south korea | | unio douglasiae sinuolatus | subspecies | 16 | 0 |
| spain | | unio mancus | species | 6 | 0 |
| spain | | unio ravoisieri | species | 3 | 0 |
| spain | castile and leon | unio mancus | species | 33 | 0 |
| spain | navarra | unio mancus | species | 2 | 0 |
| spain | valencia | unio mancus | species | 106 | 0 |
| sweden | | unio crassus | species | 3 | 0 |
| sweden | | unio pictorum | species | 1 | 0 |
| sweden | | unio tumidus | species | 1 | 0 |
| tunisia | | unio durieui | species | 36 | 0 |
| tunisia | | unio gibbus | species | 14 | 0 |
| tunisia | | unio ravoisieri | species | 38 | 0 |
| turkey | | unio crassus bruguierianus | subspecies | 141 | 0 |
| turkey | | unio pictorum | species | 89 | 0 |
| turkey | | unio tigridis | species | 35 | 0 |
| turkey | | unio tumidus | species | 11 | 0 |
| ukraine | | unio pictorum | species | 4 | 0 |
| ukraine | | unio tumidus | species | 4 | 0 |
| united kingdom | england | unio pictorum | species | 25 | 0 |
| united kingdom | england | unio tumidus | species | 9 | 0 |
| vietnam | | unio nuxpersicae | species | 2 | 0 |