Neoperla arambourgana, Navas, Navas, 1936

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

7' Caudal edge of S8 with two soft points flanking a crescent-shaped sclerite which is shifted a little forward towards the vagina ( Figs. 463–465 ). Egg slender, ovoid, with levogyrous striae ( Fig. 466 )..................... 80 N. arambourgana Navás

8 S8 caudally long, parabolic, with an anchor pattern. SSt long, egg sulci spiral and very narrow........................ 9

8' S8 caudally truncate, not prolonged, SSt and egg variable.................................................... 10

Figures

FIGURES 459–465. Neoperla arambourgana Navás: ♁ lectotype: 459, diagrammatic dorsal and lateral views of abdominal tip, tergites, hemitergite 10 and cercus labeled; 460: distal half of penis. 461, process on T8 of ♁ from Rutshuru, D. R. Congo, diagrammatic; 462, endophallus of ♁ from Walikale, D. R.Congo.♀ genital situs:463, riv. Eulya, nr Kamituga, D. R. Congo; 464, Urwald Mawambi, D. R. Congo; 465, from Kama, D. R. Congo. Scales are 100µm, unless differently labeled; sa, spermatheca; SSt., spermathecal stalk; V, vagina.

FIGURES 466–476. females in the Neoperla leroiana cluster, eggs and diagrammatic genital situs to similar sizes, from photographs: N. arambourgana Navás: 466, egg of ♀ from Kama (D. R. Congo; NEOP272); 467, ♀ from Popokabaka (D. R. Congo, NEOP271). N. dundoana n. sp.: 468, 469, egg and genital situs of HT (Dundo, Z16.180, NEOP268). Neoperla leroiana Klapálek: 470, egg of ♀ from Ngonlutu, Togo; ♀ genital situs: 471, Xandel, Angola; 472, Odzala N. P.; 473, Guinea, Konkouré à Linsan; 474, Central Afr. Rep., Bayanga (NEOP281); 475, Victoria Falls (NEOP279); 476, SEM of anchor pole of female from Nigeria (courtesy MPI of Limnology, Pl̂n).