IsogenusIsogenus is a genus of insect belonging to the family Perlodidae.The genus was first described by Newman in 1833.The species of this genus are mostly found in the Palaearctic realm.SpeciesThe Plecoptera Species File lists: Isogenus kohbonis Ricker, 1952 Isogenus ligea Newman, 1839 Isogenus nakaharae Okamoto, 1912 Isogenus nubecula Newman, 1833 - '''type species'''