Neoperla costata, 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 : 21

6 S8 caudally rounded, vagina long and narrow ( Fig. 17 ). Egg an elongate ovoid, or sides nearly parallel, ridges are smooth, cells on collar flanged ( Figs. 23–24 )............................................................ 4 N. costata n. sp.

Figures

FIGURES 16–17. Female genital situs: 16, N. lujana Navás, not to scale; 17, N. costata n. sp. (Liberia, near Tapeta). co, common oviduct; scl, sclerite in vagina; sd, spermathecal duct; SSt, spermathecal stalk; V, vagina.

FIGURES 18–25. eggs of the N. lujana-complex: 18, the N. lujana Navás holotype; 19, from Bayanga (CAR, NEOP019); 20, from Odzala N. P. (NEOP018); 21, top view of egg (D. R. Congo, N of Bukavu) (after Moore 1991). N. costata n. sp.: 22, optical cross section; 23, lateral view of an egg, with enlarged profile of a ridge (Liberia, near Tapeta) to the left hand side; 24, egg from Adamaua. N. serrula n. sp.: 25, egg, an enlarged profile of a ridge (Holotype, NEOP010, Ghana, Agumatsa falls, slide 20.12) to the right hand side. Scales are 100µm, unless differently indicated. Details of costae are to the same scale.