Neoperla kalengonis, 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

2 Vagina and base of SSt without large stacks of folds, SSt long and parallel, U-shaped, the two sections of similar length, full of elongate reddish spinules. Egg collar large, wide and inflated, cup-like ( Figs. 28–32 )................ 6 N. kalengonis n. sp

2' Vagina and/or base of SSt with many large folds. SSt bent, the forward-directed section much shorter than the sideward section, armature colourless and hard to see. Egg collar narrow........................................................ 3

3 Anchor pole truncate, collar contracted, short, sometimes ring-like, no distinct cells ( Figs. 6, 8 ). Eggs with approximately 12, of one morph with up to 16 ridges........................................................................ 4

3' Egg gradually narrowing towards collar which is either long or bears cells with high walls........................... 5

Figures

FIGURES 26–32.Neoperla kalengonisn. sp.: 26, artificiallyevertedpenis ofa paratype;27, spines on endophallus of same, scale is 50µm; 28, paratype ♀, genital situs; 29, 30, eggs of paratypes, 30 courtesy of MPI of Limnology; 31, egg from South Sudan; 32, anchorpoleandcollarofeggfromLwiroR.Scalesare100µmunlessdifferentlyindicated,30nottoscale,29and31tothesamescale. sa, spermatheca; SSt, spermathecal stalk.

FIGURES 6–10. Neoperla transvaalensis (Enderlein) (6, 7) and N. laticollis Klapálek (8–10): 6, female situs, specimen from Rwanda; 7, egg, semi-diagrammatic, not to scale; 8, female situs; 9, egg, lateral view; 10, enlarged detail of a costa. The scales are 100µm; a, anchor; c, collar; fo, stack of membranous folds; gp, gonopore; hk, hard knob, retractor apodeme; ls, lateral vaginal sclerite; mc, mediobasal callus of HT10, the hemitergite 10. mi, micropyle; op, operculum; sa, spermatheca; sd, spermathecal duct; S9, protruding tip of S9; sa, coiled spermatheca; V, vagina.