Neoperla biserrata, 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 : 88

19' Penis with subterminal spinose swelling, spine tips directed basad. Endophallus base conical, with some delicate spinules, distally a narrow tube with two saw-like rows of teeth (Figs. 267–271)........................... 48 N. biserrata n. sp.

Females

1 SSt straight or bag-shaped, not coiled. ~18 straight egg striae. No marks on S8..................................... 2 1‘ SSt coiled, inside with dense coat of scales, number of egg striae variable. S8 often patterned......................... 3 2 SSt finger-shaped, narrow. Egg slender, collar a small crown on the flat anchor pole, operculum convex, punctate ( Figs. 81–

Figures

FIGURES 76–82. Neoperla duodeviginti n. sp.: 76–78, ♁ abdominal tip and contracted penis, specimen from Bui Camp, Ghana (not to scale, tergites and HT10 labeled; modified from Zwick, 1973b); 79, penis with everted endophallus, specimen from Ghana, river Mensu; 80, endophallus of holotype (NEOP048) from Cameroon; 81, 82, genital situs and egg, ♀ from Belefuanai. Scales are 100µm unless differently indicated. a, anchor; c, collar: od, oviduct; sa, spermatheca; SSt, spermathecal stalk; V, vagina.