1. His main interests among insects were the Diptera and Ephemeroptera . 2. Molecular studies suggest that this order is the sister to Plecoptera or to Ephemeroptera . 3. They are a family of the order Ephemeroptera . 4. In his early work the organism of interest was the mayfly ( Ephemeroptera ). 5. Hubbard and co-workers documented 46 species in 8 families of order Ephemeroptera . 6. Below the acid mine drainage, there were two taxa, neither of which belonged to Ephemeroptera or Plecoptera. 7. The EPT Index ( Ephemeroptera , Plecoptera, and Trichoptera Index ) has also been measured for the creek. 8. Below the acid mine drainage, there were only two taxa, neither of which belonged to Ephemeroptera or Plecoptera. 9. Large populations of species in the insect orders Ephemeroptera , Plecoptera and Trichoptera . indicate good health of the creek. 10. He is credited with describing 381 living and 129 fossil species of Trichoptera, as well as 111 species of Ephemeroptera .