Stoneflies of the genus Zwicknia Murányi, 2014 (Plecoptera: Capniidae) from western Switzerland Author Reding, Jean-Paul G. text Zootaxa 2018 2018-02-21 4382 2 201 241 journal article 30700 10.11646/zootaxa.4382.2.1 53525486-c356-4dd1-9bf8-a3265dfbf841 1175-5326 1181964 646644A8-2587-4545-AF08-DC2A096DCB77 Key to adults of Zwicknia from western Switzerland 1 Macropterous ( Figs. 4 , 9 and 14 ). Cubital cell of forewing delimitated by the two cross-veins between veins Cu1 and Cu2 quadrangular in shape ( Figs. 4 , 9 and 14 ; Aubert 1959 : 26, Fig. 22 ; Murányi et al. 2014: 31, Fig. 56 ). Posterior margin of subgenital plate (sternite 8) rectilinear or slightly rounded ( Fig. 5 )........... adult females of Zwicknia (not keyed out further) - Micropterous ( Figs. 1 and 6 ) or brachypterous ( Figs. 10 and 13 ). Presence of an epiproct sclerite bent over the last tergites; tergite 9 with a characteristic process ( Figs. 3 , 8 and 12 ). Presence of a ventral vesicle at the center of the posterior margin of sternite 9 ( Figs. 2 , 7 and 11 )......................................................... 2 (adult males of Zwicknia ) 2 Brachypterous ( Figs. 10 and 13 ). Tip of main epiproct sclerite long, slender, regularly bent and pointed at apex, in lateral view ( Fig. 12 ). Process on tergite 9 high, perpendicularly raised and less than twice as wide as the main epiproct sclerite ( Fig. 12 ; Boumans & Murányi 2014 : 8, Fig. 2 ). Ventral vesicle half as wide as the subgenital plate ( Fig. 11 )..... Zwicknia westermanni - Micropterous ( Figs. 1 and 6 )............................................................................. 3 3 In lateral view, the tip of the main epiproct sclerite is ogive, neither up-curved nor down-curved ( Fig. 3 ). In dorsal view, the main epiproct sclerite is long and slender, with nearly parallel edges and without bulges ( Reding et al. 2016 : 140, Fig. 4 ). Process of tergite 9 low, rising sharply near the distal region of the corresponding tergite, not projecting caudally ( Fig. 3 ). Ventral vesicle small, rounded at apex; width about ¼ to 1/5 of the subgenital plate ( Fig. 2 ; Reding et al. 2016 : 141, Fig. 5 )............................................................................................... Zwicknia ledoarei - In lateral view, the tip of the main epiproct sclerite is pointed, slightly up-curved ( Fig. 8 ). Process of tergite 9 high and perpendicularly elevated, in lateral view ( Fig. 8 ), arch-shaped in dorso-caudal view (Murányi et al. 2014: 58, Fig. 120). Ventral vesicle covering slightly less than half the width of the subgenital plate ( Fig. 7 )........................... Zwicknia bifrons