Neoperla orthonema, 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 : 89

6 Anchor cap supported by several fine threads, not by a single stem ( Figs. 301–304 )............... 52 N. orthonema n. sp.

6' Anchor cap rests on a single entire stem 6 .................................................................. 7

7 Vagina with conical forward curved top containing many scales, the SSt is>10 times longer than the vagina and attaches to the conical top in front.................................................................................... 8

7‘ Vagina approximately calyx-shaped, top not conical, SSt attached dorsally, length of SSt variable...................... 9

Figures

FIGURES 294–304. Neoperla orthonema n. sp.: Male paratype from Lakota, Ivory Coast: 294, 295, abdominal tip; 296, everted penis, with detail from middle of endophallus; 297–299, apex of contracted penis, in dorsal, ventral and lateral views (from left); 300, lateral view of penis apex, beginning eversion (♁ from Kousankoro); 301, female genital situs (vagina flipped back to show the anchor pattern on S8) and 302, egg, Ankasa game prod. res., Ghana; 303, view onto edge of chorion fragment showing variable size of costae (Ivory Coast, Lakota); 304, detail of collar with end of striae (Wli Falls, Ghana). Scales are 100µm. Tergites, sternites and hemitergite 10 are labeled. d, dorsal spines; eb, spines at base of endophallus; sa, spermatheca; SSt, spermathecal stalk; V, vagina; vs, ventral spines.