| canada | | ephemera simulans | species | 3 | 0 |
| canada | | ephemera varia | species | 2 | 0 |
| canada | alberta | ephemera simulans | species | 2 | 0 |
| canada | manitoba | ephemera simulans | species | 33 | 0 |
| canada | manitoba | hexagenia limbata | species | 17 | 0 |
| canada | new brunswick | ephemera simulans | species | 3 | 0 |
| canada | new brunswick | ephemera varia | species | 18 | 0 |
| canada | newfoundland and labrador | litobrancha recurvata | species | 1 | 0 |
| canada | ontario | ephemera guttulata | species | 3 | 0 |
| canada | ontario | ephemera simulans | species | 22 | 0 |
| canada | ontario | ephemera varia | species | 1 | 0 |
| canada | ontario | hexagenia atrocaudata | species | 1 | 0 |
| canada | ontario | hexagenia cf. limbata dimc123-09 | species | 1 | 0 |
| canada | ontario | hexagenia limbata | species | 104 | 0 |
| canada | ontario | hexagenia rigida | species | 6 | 0 |
| canada | ontario | hexagenia sp. cngbf1801-14 | species | 1 | 0 |
| canada | ontario | litobrancha recurvata | species | 3 | 0 |
| canada | saskatchewan | hexagenia limbata | species | 14 | 0 |
| germany | | ephemera danica | species | 1 | 0 |
| germany | | ephemera sp. 1 bm-2008 | species | 1 | 0 |
| germany | bavaria | ephemera danica | species | 3 | 0 |
| germany | bavaria | ephemera glaucops | species | 3 | 0 |
| germany | bavaria | ephemera vulgata | species | 12 | 0 |
| germany | brandenburg | ephemera vulgata | species | 1 | 0 |
| germany | hesse | ephemera danica | species | 1 | 0 |
| germany | north rhine-westphalia | ephemera danica | species | 4260 | 0 |
| india | | ephemera nadinae | species | 1 | 0 |
| italy | tuscany region | ephemera danica | species | 1 | 0 |
| japan | | ephemera japonica | species | 6 | 0 |
| japan | | ephemera orientalis | species | 4 | 0 |
| japan | | ephemera strigata | species | 1 | 0 |
| japan | aichi prefecture | ephemera strigata | species | 2 | 0 |
| japan | ehime prefecture | ephemera japonica | species | 1 | 0 |
| japan | fukuoka prefecture | ephemera strigata | species | 2 | 0 |
| japan | hokkaido prefecture | ephemera strigata | species | 2 | 0 |
| japan | kanagawa prefecture | ephemera japonica | species | 2 | 0 |
| japan | kochi prefecture | ephemera japonica | species | 4 | 0 |
| japan | kyoto prefecture | ephemera orientalis | species | 3 | 0 |
| japan | nara prefecture | ephemera strigata | species | 2 | 0 |
| japan | shimane prefecture | ephemera japonica | species | 2 | 0 |
| japan | shimane prefecture | ephemera strigata | species | 1 | 0 |
| japan | wakayama prefecture | ephemera japonica | species | 1 | 0 |
| norway | finnmark county | ephemera danica | species | 1 | 0 |
| norway | finnmark county | ephemera vulgata | species | 3 | 0 |
| russia | jewish autonomous oblast | ephemera strigata | species | 66 | 0 |
| russia | primorsky krai | ephemera separigata | species | 2 | 0 |
| russia | primorsky krai | ephemera strigata | species | 6 | 0 |
| south korea | gyeonggi province | ephemera orientalis | species | 3 | 0 |
| south korea | gyeonggi province | ephemera separigata | species | 1 | 0 |
| taiwan | | ephemera formosana | species | 1 | 0 |
| taiwan | | ephemera sp. ch-2014 | species | 1 | 0 |
| united kingdom | | ephemera danica | species | 6 | 0 |
| united states | colorado | ephemera simulans | species | 1 | 0 |
| united states | florida | hexagenia limbata | species | 2 | 0 |
| united states | florida | hexagenia orlando | species | 1 | 0 |
| united states | indiana | hexagenia limbata | species | 4 | 0 |
| united states | new hampshire | hexagenia limbata | species | 8 | 0 |
| united states | oklahoma | hexagenia bilineata | species | 2 | 0 |
| united states | oklahoma | hexagenia limbata | species | 1 | 0 |
| united states | washington | hexagenia limbata | species | 1 | 0 |