| canada | | isotomurus plumosus l2 | species | 1 | 0 |
| canada | | isotomurus stuxbergi | species | 3 | 0 |
| canada | alberta | isotomurus plumosus l2 | species | 127 | 0 |
| canada | alberta | isotomurus sp. bold:aaa5264 | species | 8 | 0 |
| canada | manitoba | isotomurus plumosus l1 | species | 33 | 0 |
| canada | manitoba | isotomurus plumosus l2 | species | 4 | 0 |
| canada | manitoba | isotomurus sp. bold:aaa5264 | species | 1 | 0 |
| canada | manitoba | isotomurus stuxbergi | species | 10 | 0 |
| canada | nova scotia | isotomurus sp. bold:aai5787 | species | 1 | 0 |
| canada | nunavut | isotomurus sp. bold:aai2046 | species | 8 | 0 |
| canada | ontario | isotomurus palustris | species | 16 | 0 |
| canada | ontario | isotomurus unifasciatus | species | 9 | 0 |
| canada | quebec | isotomurus sp. bold:aai5787 | species | 7 | 0 |
| canada | saskatchewan | isotomurus plumosus l2 | species | 29 | 0 |
| canada | saskatchewan | isotomurus sp. bold:aaa5264 | species | 3 | 0 |
| ireland | | isotomurus cf. unifasciatus mnhn cd363 | species | 4 | 0 |
| ireland | | isotomurus palustris | species | 3 | 0 |
| italy | tuscany region | isotomurus maculatus | species | 17 | 0 |
| new zealand | | isotomurus cf. unifasciatus mnhn cm588 | species | 4 | 0 |
| united kingdom | | isotomurus fucicolus | species | 1 | 0 |
| united kingdom | | isotomurus maculatus | species | 1 | 0 |
| united kingdom | | isotomurus palustris | species | 1 | 0 |
| united states | ohio | isotomurus sp. cei5 | species | 3 | 0 |