FIGURES 1–9 in A new classification of genus Neoperla and systematic studies of other Perlinae (Plecoptera: Perlidae)

FIGURES 1–9. Genitalia of Neoperla spp., male abdominal tip, hemitergites (* indicates the hemitergal callus) and penes. Neoperla (N.) spio (Newman, 1839), the ♁ holotype: 1, abdominal tip, dorsal view; 2, the same, lateral; N. fallax Klapálek, 1910: 3, ♁ abdomen, dorsal view; 4, everted penis; 5, enlarged detail of penis base, ventral view, 6, the same, lateral view; 7, ♀ situs, dorsal view. 8, the same as N. (N.) duodeviginti Zwick & Zwick, 2023; 9, the same of N. (N.) camerunensis (Enderlein, 1909a). Tergites are labeled. a, anchor; ag, accessory gland; c, cercus; eE, everted endophallus; ep, epiproct; f, basal opening (foramen) of penis; HT10, hemitergite 10; od, oviduct; pp, paraproct; sa, spermatheca; sc, sclerotized hard knobs; sd, spermathecal duct; SSt, spermathecal stalk; v, vagina; vs, vaginal sclerites. 1–2, 8–9 modified from Zwick & Zwick (2023), 3–7 after Zwick (1971, 1983).