A new species of Neoephemera McDunnough, 1925 (Ephemeroptera: Neoephemeridae) from North Carolina and Virginia Author Holland, Victor B. Author Beaty, Steven R. Author Jacobus, Luke M. text Zootaxa 2016 4138 1 139 154 journal article 38561 10.11646/zootaxa.4138.1.6 2daedc4f-7cf6-4b04-9230-33fe9be15483 1175-5326 256700 68B85686-A460-4989-A74B-0F6E97BF761B Key to imagos of North American Neoephemera species (modified from Bae & McCafferty, 1998 ) 1 Forewing longitudinal veins purplish black. Body length> 13 mm ...................................... N. purpurea - Forewing longitudinal veins pale. Body length 7–10.5 mm ..................................................... 2 2(1) Caudal filaments annulated on alternating segments.......................................................... 3 - Caudal filaments not annulated...........................................................................4 3(2) Male dorsal maculations as in Fig. 18 ; male foretibia at least 2× as long as mid- and hind- tibia and all female leg lengths sub- equal ( Figs 23–25 ); legs white with apical banding on femora faint or absent; obovate anteronotal protuberance on the meso- thorax ( Fig. 29 )................................................................................. N. eatoni - Male dorsal maculations as in Fig. 19 ; male fore tibia <2× the length of mid and hind tibia ( Figs 26–28 ); females with hind legs longer than mid legs; legs smoky with distinct purplish black apical banding on femora; anteronotal protuberance a curvilinear triangle ( Fig. 30 ).......................................................................... N. youngi 4(2) Forefemora colored with purplish grey markings. Tarsi annulated...................................... N. compressa - Forefemora pale. Tarsal annulation absent............................................................ N. bicolor