Neoephemera

Holland, Victor B., Beaty, Steven R. & Jacobus, Luke M., 2016, A new species of Neoephemera McDunnough, 1925 (Ephemeroptera: Neoephemeridae) from North Carolina and Virginia, Zootaxa 4138 (1), pp. 139-154 : 151-152

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

Figures

FIGURES 18 – 22. Neoephemera eatoni sp. nov. and N. youngi, male imago: 18, N. eatoni sp. nov. dorsal habitus; 19, N. youngi dorsal habitus; 20 – 22, N. eatoni sp. nov.: 20, genitalia; 21, forewing; 22, hindwing.

FIGURES 23 – 28. Neoephemera eatoni sp. nov. and N. youngi, male imago: 23 – 25, N. eatoni sp. nov.: 23, foreleg; 24, midleg; 25, hindleg; 26 – 28, N. youngi: 26, foreleg; 27, midleg; 28, hindleg.

FIGURES 29 – 30. Neoephemera eatoni sp. nov. and N. youngi, dorsal view of male imagos: 29, N. eatoni sp. nov. anteronodal protuberance on the mesothorax, 30, N. youngi anteronodal protuberance on the mesothorax.