Neoperla sorella, 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 : 130

2' Tip of HT process not hook-shaped ( Fig. 386 ). Penis with only one subterminal spine group. Endophallus dorsally with a wide spine field, ventral face bare ( Fig. 387 )...................................................... 67 N. sorella n. sp.

3 T7 with a strongly raised wide caudal process, its hind corners diverge ( Figs. 365, 366 , 486 ).......................... 4

3' T7 without caudal process, concave between the blunt corners of a caudal bench-like elevation ( Fig. 422 ), or between 2 low paramedian humps. T8 and penis variable.................................................................. 5

Figures

FIGURES 386–390. Neoperla sorella n. sp.: 386, 387, male holotype, abdominal tip and everted penis; 388–390, female paratype, genital situs and egg (with enlarged detail of 2 merging striae) from Bolonzo. Scales are 100µm, unless differently labelled. FIGURES 391–393. Neoperla simplex n. sp., ♀: 391, 392 genital, situs and egg of paratype from Sankuru; 393, operculum of egg of holotype from Yangambi. Figs 391 and 393 not to scale. a, anchor; mi, micropyle; n, nail; od, oviduct; sa, spermatheca; SSt, spermathecal stalk.

FIGURES 365–372. Neoperla excisa Klapálek: 365, ♁ lectotype, dorsal view of abdominal tip (from Klapálek 1923b); 366, abdominal tip of ♁ from Bumbuna, Sierra Leone, tergites and HT10 labeled; 367, handsketch of hemitergites and abdominal tip (lateral view) of the actual lectotype specimen, drawn in 1973; 368, penis, ♁ from Makokou, Gaboon; 369, 370, genital situs and egg of ♀ from Walikale; 371, egg from Odzala N. P.; 372, chorion of Guinean specimen (NEOP236). Scales are 100µm, except 50µm in Fig. 372. a, anchor; n, nail; sa, spermatheca; SSt, spermathecal stalk.

FIGURES 486–489. Neoperla sp. Afr_A: male abdominal tip of the only specimen, in dorsal view when still untreated (486) and in lateral view (487), after clearing which made the processes on T7 and T8 spread and diverge; blue lines connect identical structures in the 2 views. 488, the burst penis with the partly everted endophallus; 489, the same, enlarged. Scales are 100µm, terhites, hemitergite 10, cercus and epiproct are labeled. FIGURE 490. Egg of Neoperla sp. Afr_B (from Kalonge); the scale is 100µm long.

FIGURES 422–428. Neoperla crenulata n. sp. Presumed male: 422, abdominal tip; 423, penis; 424, everted endophallus, with enlarged detail. ♀ holotype: 425, genital situs; 426, egg; 427, detail of chorion structure, direct view of surface; 428, same, oblique view of profile. Scales are 100µm in 423–426, 50µm in 427 and 428. Tergites, hemitergite10 and epiproct are labeled. c, collar; n, nail; sa, spermatheca; sc, small cone opposite knee-like bend of penis; SSt, spermathecal stalk; V, vagina.