Neoperla dianae, Zwick & Zwick, 2023

Zwick, Peter & Zwick, Andreas, 2023, Revision of the African Neoperla Needham, 1905 (Plecoptera: Perlidae: Perlinae) based on morphological and molecular data, Zootaxa 5316 (1), pp. 1-194 : 131

4 Caudal edge of S8 triangularly recessed, a short conical nail projects from the notch. Floor of vagina sclerotised, a massive inversely U-shaped crest meets an internal ridge along the antecosta 8. Egg with levogyrous spiral striae ( Figs. 397–399 )......................................................................................... 70 N. dianae n. sp.

4' Different, eggs and S8 variable.......................................................................... 5

5 The center of the caudal edge of S8 with a distinct notch...................................................... 6

5' Caudal edge of S8 not notched, variable................................................................... 8

Figures

FIGURES 397–401. Neoperla dianae n. sp., female: 397, genital situs (Libamba, Cameroon); 398, egg from Kumba, Cameroon, with variable thickness of chorion (reddish-brown), arrow points at abrupt thinning; 399, egg from Walikale, D. R. of the Congo; 400, anchor pole with collar and anchor and 401, detail of striae with 2 micropyles (from Libamba). Scale lines are 100µm, unless differently indicated; a, anchor; ac, anchor cavity; co, costa; cr, curved ridge; ct, crest; mi, micropyle; n, nail; sa, spermatheca; su, sulcus; SSt, spermathecal stalk; V, vagina.