| ecuador | | achnanthidium minutissimum | species | 2 | 0 |
| france | | achnanthidium minutissimum | species | 4 | 0 |
| germany | | achnanthidium minutissimum | species | 2 | 0 |
| germany | bavaria | achnanthidium minutissimum | species | 1 | 0 |
| germany | lower saxony | achnanthidium minutissimum | species | 1 | 0 |
| iraq | | achnanthidium minutissimum | species | 1 | 0 |
| italy | | achnanthidium minutissimum | species | 4 | 0 |
| luxembourg | | achnanthidium minutissimum | species | 3 | 0 |
| russia | irkutsk oblast | achnanthidium minutissimum | species | 2 | 0 |
| south korea | | achnanthidium minutissimum | species | 1 | 0 |
| united states | hawaii | achnanthidium minutissimum | species | 2 | 0 |
| united states | montana | achnanthidium minutissimum | species | 2 | 0 |
| united states | new jersey | achnanthidium minutissimum | species | 2 | 0 |
| united states | new york | achnanthidium minutissimum | species | 6 | 0 |
| united states | virginia | achnanthidium minutissimum | species | 2 | 0 |