Neoperla (Formosita) fasciata, Zwick, 2023

Zwick, Peter, 2023, A new classification of genus Neoperla and systematic studies of other Perlinae (Plecoptera: Perlidae), Zootaxa 5339 (2), pp. 101-131 : 115

Neoperla (Formosita) fasciata n. sp.

( Figs. 50–52 )

Material studied: 1♀, Holotype, INDIA, Kaziranga [Kaziranga Ntl. Park, Assam [26.67°N, 93.17°E], 75m, 7.- 9.5.1975 \ Wittmer, Baroni U. 1976 (Mus. Basel).

Habitus ( Fig. 50 ). Total length 11mm, wing length 9mm. Light yellow with strong brown pattern. Head brown, sides of frontoclypeus, M-line and tentorial marks yellow, lower face brown. A transverse brown band extends across middle of pronotum, lower face yellow. Meso- and metanotum, sides in front of pleural suture and sides of basisternum brown. Abdomen yellow. Antenna yellow at base, distally darkened. Cercus yellow at base, distal part missing. Legs dark brown, median third of profemur yellow, more yellow on middle femur, hind femur mainly yellow.

Male. Unknown.

Female ( Fig. 51–52 ). S8 unmodified. There are many concentric folds on top of the vagina, lateral sclerotized rods among the lower folds are visible in side view or by transparency. The long and narrow extension between the top reaches far back into S9. If structures in the extension are a pair of coalescent sclerites or a single one with Ushaped cross section is uncertain. Egg not available.

Etymology. The name is a Latin adjective describing the dark band across the pronotum.

Figures

FIGURES 50–56. Neoperla (Formosita) spp. of the fasciata-group. Holotype of N. (F.) fasciata new species: 50, head and pronotum; 51–52, vagina in dorsal and lateral views. Neoperla (F.) sp., cf. N. (F.) bimaculata Li et al. 2021: 53, egg; 54, head and pronotum; 55, vagina, dorsal view; 56, N. (F.) montivaga Zwick. Not to scale. od, common oviduct; sa, spermatheca; sd, spermathecal duct; v, vagina. 56 from Zwick (1977), the others are originals.