A new subgenus of Epeorus and its five species from China (Ephemeroptera: Heptageniidae)

Abstract A new subgenus, Siniron subgen. n. , is established for five Chinese species of Epeorus Eaton, 1881 to recognize their distinct difference from other subgenera: 1) in nymphs, tergalius I widely expanded anteriorly while VII curved but unfolded, well developed paired spines on abdominal terga; 2) adults, unique coloration wings, penis with median titillators. Among them, nymphal stages four previously known species, E. ( S .) sinensis (Ulmer, 1925), dayongensis Gui & Zhang, 1992, herklotsi (Hsu, 1936b) and S. ) ngi Gui, Zhou Su, 1999, are described the first time imaginal also re-described. The fifth which has apically pigmented hind wings imago protuberances pronotum nymph, as a tuberculatus sp. All these can be delimited by COI sequences. In addition, distribution China provided.