The Nemourinae (Insecta, Nemouridae) of the eastern Nearctic Author Grubbs, Scott A. 0000-0003-2170-9716 Department of Biology and Center for Biodiversity Studies, Western Kentucky University, Bowling Green, Kentucky, 42101, USA Department of Biology and Monte L. Bean Life Science Museum, Brigham Young University, Provo, Utah, 84602, USA & scott. grubbs @ wku. edu; https: // orcid. org / 0000 - 0003 - 2170 - 9716 scott.grubbs@wku.edu Author Baumann, Richard W. 0000-0003-0838-4080 richard _ baumann @ byu. edu; https: // orcid. org / 0000 - 0003 - 0838 - 4080 richard_baumann@byu.edu text Zootaxa 2023 2023-06-19 5306 1 1 53 http://dx.doi.org/10.11646/zootaxa.5306.1.1 journal article 56121 10.11646/zootaxa.5306.1.1 a81c4131-079c-4d9f-8333-70c0de3fb44e 1175-5326 8054287 21AD4F85-E313-47CB-BA98-9896D2B1DC05 IV. Genus Paranemoura Needham & Claassen, 1925 http://lsid.speciesfile.org/urn:lsid: Plecoptera .speciesfile.org:TaxonName:6125 Type species. Nemoura perfecta Walker, 1852 Range. Eastern Nearctic ( DeWalt et al. 2022 ) Diagnosis. See Baumann (1975) for a comprehensive description of the genus and Baumann (1996) for a morphological-based treatment of the two species. FIGURES 37‒42. Ostrocerca truncata . 37, male abdominal terminalia, dorsal view; 38, Canada, Ontario, Clare River, male abdominal terminalia, dorsal view; 39, Canada, Ontario, Clare River, epiproct, lateral view; 40, male abdominal terminalia, ventral view; 41, USA, New York, Cascadilla Creek, female abdominal terminalia, ventral view; 42, USA, West Virginia, headwaters Davis Creek, female abdominal terminalia, ventral view. c = cercus, ds = dorsal sclerite, hy = hypoproct, ipl = inner paraproct lobe, la = lateral arm, sgp = subgenital plate, vs = ventral sclerite. Species key to eastern Nearctic Paranemoura adult males and females 1 Males .............................................................................................. 2 - Females............................................................................................. 3 2 Posterolateral margin of epiproct ventral sclerite notched ( Figs. 43–44 )................................... P. claasseni - Posterolateral margin of epiproct ventral sclerite smoothly rounded, lacking notch ( Figs. 49–50 )............... P. perfecta 3 Y-sclerite of sternum 8 closed along posterior margin by narrow sclerotized line ( Figs. 47–48 )................ P. claasseni - Y-sclerite of sternum 8 open along posterior margin ( Figs. 53–54 )....................................... P. perfecta