| australia | queensland | hydrotaea chalcogaster | species | 6 | 0 |
| australia | western australia | hydrotaea rostrata | species | 1 | 0 |
| brazil | rio grande do sul | hydrotaea sp. schuehli 10.xi.00 | species | 4 | 0 |
| brazil | sao paulo | hydrotaea solitaria | species | 3 | 0 |
| canada | | hydrotaea ignava | species | 1 | 0 |
| canada | | hydrotaea militaris | species | 7 | 0 |
| canada | | hydrotaea ponti | species | 1 | 0 |
| canada | | hydrotaea scambus | species | 2 | 0 |
| canada | | hydrotaea unispinosa | species | 1 | 0 |
| canada | alberta | hydrotaea militaris | species | 76 | 0 |
| canada | alberta | hydrotaea pilitibia | species | 5 | 0 |
| canada | alberta | hydrotaea sp. bold:aag1761 | species | 8 | 0 |
| canada | alberta | hydrotaea sp. bold:aag1768 | species | 340 | 0 |
| canada | alberta | hydrotaea sp. bold-2016 | species | 1 | 0 |
| canada | alberta | hydrotaea unispinosa | species | 2 | 0 |
| canada | british columbia | hydrotaea militaris | species | 31 | 0 |
| canada | british columbia | hydrotaea ponti | species | 1 | 0 |
| canada | british columbia | hydrotaea ringdahli | species | 1 | 0 |
| canada | british columbia | hydrotaea scambus | species | 6 | 0 |
| canada | british columbia | hydrotaea spinifemorata | species | 7 | 0 |
| canada | british columbia | hydrotaea unispinosa | species | 5 | 0 |
| canada | manitoba | hydrotaea aenescens | species | 2 | 0 |
| canada | manitoba | hydrotaea cristata | species | 1 | 0 |
| canada | manitoba | hydrotaea sp. 2 akr | species | 1 | 0 |
| canada | manitoba | hydrotaea sp. bold:aag1768 | species | 100 | 0 |
| canada | new brunswick | hydrotaea unispinosa | species | 1 | 0 |
| canada | newfoundland and labrador | hydrotaea armipes | species | 1 | 0 |
| canada | newfoundland and labrador | hydrotaea diabolus | species | 1 | 0 |
| canada | newfoundland and labrador | hydrotaea floccosa | species | 4 | 0 |
| canada | newfoundland and labrador | hydrotaea militaris | species | 7 | 0 |
| canada | newfoundland and labrador | hydrotaea pilitibia | species | 58 | 0 |
| canada | newfoundland and labrador | hydrotaea ponti | species | 18 | 0 |
| canada | newfoundland and labrador | hydrotaea scambus | species | 5 | 0 |
| canada | newfoundland and labrador | hydrotaea sp. 2akr | species | 1 | 0 |
| canada | newfoundland and labrador | hydrotaea sp. bold-2016 | species | 2 | 0 |
| canada | newfoundland and labrador | hydrotaea unispinosa | species | 6 | 0 |
| canada | northwest territories | hydrotaea armipes | species | 3 | 0 |
| canada | northwest territories | hydrotaea pilitibia | species | 1 | 0 |
| canada | northwest territories | hydrotaea scambus | species | 1 | 0 |
| canada | northwest territories | hydrotaea sp. bold-2016 | species | 1 | 0 |
| canada | nova scotia | hydrotaea floccosa | species | 1 | 0 |
| canada | nova scotia | hydrotaea militaris | species | 16 | 0 |
| canada | nova scotia | hydrotaea ponti | species | 4 | 0 |
| canada | nova scotia | hydrotaea sp. 2akr | species | 2 | 0 |
| canada | ontario | hydrotaea aenescens | species | 1 | 0 |
| canada | ontario | hydrotaea armipes | species | 1 | 0 |
| canada | ontario | hydrotaea floccosa | species | 1 | 0 |
| canada | ontario | hydrotaea pilitibia | species | 1 | 0 |
| canada | ontario | hydrotaea scambus | species | 1 | 0 |
| canada | ontario | hydrotaea sp. 1 akr | species | 6 | 0 |
| canada | quebec | hydrotaea militaris | species | 1 | 0 |
| canada | quebec | hydrotaea pilitibia | species | 1 | 0 |
| canada | quebec | hydrotaea ponti | species | 3 | 0 |
| canada | quebec | hydrotaea ringdahli | species | 1 | 0 |
| canada | quebec | hydrotaea unispinosa | species | 1 | 0 |
| canada | saskatchewan | hydrotaea cf. meteorica bold-2016 | species | 1 | 0 |
| canada | saskatchewan | hydrotaea floccosa | species | 1 | 0 |
| canada | saskatchewan | hydrotaea militaris | species | 18 | 0 |
| canada | saskatchewan | hydrotaea pilitibia | species | 4 | 0 |
| canada | saskatchewan | hydrotaea scambus | species | 2 | 0 |
| canada | saskatchewan | hydrotaea sp. bold:aag1768 | species | 632 | 0 |
| canada | saskatchewan | hydrotaea sp. bold:aci7683 | species | 2 | 0 |
| canada | saskatchewan | hydrotaea sp. bold-2016 | species | 113 | 0 |
| canada | saskatchewan | hydrotaea unispinosa | species | 1 | 0 |
| canada | yukon | hydrotaea cf. meteorica bold-2016 | species | 6 | 0 |
| canada | yukon | hydrotaea militaris | species | 3 | 0 |
| canada | yukon | hydrotaea pilitibia | species | 2 | 0 |
| canada | yukon | hydrotaea ringdahli | species | 1 | 0 |
| canada | yukon | hydrotaea scambus | species | 33 | 0 |
| canada | yukon | hydrotaea sp. bold-2016 | species | 13 | 0 |
| canada | yukon | hydrotaea unispinosa | species | 1 | 0 |
| china | | hydrotaea chalcogaster | species | 15 | 0 |
| china | hainan | hydrotaea chalcogaster | species | 1 | 0 |
| china | heilongjiang | hydrotaea sp. csu160701cb83 | species | 1 | 0 |
| china | hunan | hydrotaea aenescens | species | 2 | 0 |
| china | hunan | hydrotaea chalcogaster | species | 2 | 0 |
| china | hunan | hydrotaea dentipes | species | 4 | 0 |
| china | inner mongolia | hydrotaea aenescens | species | 2 | 0 |
| china | inner mongolia | hydrotaea chalcogaster | species | 2 | 0 |
| china | jilin | hydrotaea aenescens | species | 2 | 0 |
| china | jilin | hydrotaea chalcogaster | species | 1 | 0 |
| china | tibet | hydrotaea aenescens | species | 2 | 0 |
| china | tibet | hydrotaea dentipes | species | 3 | 0 |
| china | yunnan | hydrotaea sp. hy-2016 | species | 1 | 0 |
| croatia | | hydrotaea irritans | species | 3 | 0 |
| ecuador | napo province | hydrotaea aenescens | species | 5 | 0 |
| ecuador | pichincha province | hydrotaea aenescens | species | 8 | 0 |
| finland | kainuu region | hydrotaea pellucens | species | 1 | 0 |
| finland | uusimaa region | hydrotaea ignava | species | 1 | 0 |
| finland | uusimaa region | hydrotaea meteorica | species | 1 | 0 |
| greenland | | hydrotaea anxia | species | 3 | 0 |
| india | | hydrotaea armipes | species | 1 | 0 |
| india | | hydrotaea chalcogaster | species | 2 | 0 |
| india | | hydrotaea ignava | species | 3 | 0 |
| malaysia | | hydrotaea chalcogaster | species | 2 | 0 |
| poland | | hydrotaea aenescens | species | 1 | 0 |
| poland | | hydrotaea pilipes | species | 1 | 0 |
| poland | | hydrotaea similis | species | 1 | 0 |
| portugal | lisboa district | hydrotaea armipes | species | 1 | 0 |
| portugal | porto district | hydrotaea dentipes | species | 1 | 0 |
| romania | | hydrotaea leucostoma | species | 1 | 0 |
| south korea | | hydrotaea armipes | species | 1 | 0 |
| south korea | | hydrotaea chalcogaster | species | 5 | 0 |
| south korea | | hydrotaea dentipes | species | 10 | 0 |
| south korea | | hydrotaea ignava | species | 2 | 0 |
| south korea | | hydrotaea leucostoma | species | 3 | 0 |
| south korea | | hydrotaea nigra | species | 9 | 0 |
| sweden | norrbotten | hydrotaea scambus | species | 1 | 0 |
| turkey | | hydrotaea ignava | species | 1 | 0 |
| united kingdom | england | hydrotaea dentipes | species | 1 | 0 |
| united kingdom | england | hydrotaea ignava | species | 1 | 0 |
| united states | | hydrotaea aenescens | species | 1 | 0 |
| united states | alaska | hydrotaea cristata | species | 1 | 0 |
| united states | alaska | hydrotaea floccosa | species | 3 | 0 |