FIGURE 5. Bythotrephes brevimanus Lilljeborg, 1901, females. A‒D in Further revision of the genus Bythotrephes Leydig (Crustacea: Cladocera: Onychopoda): redescription of B. brevimanus Lilljeborg, reevaluation of B. cederströmii Schödler, and description of a new species of the genus

FIGURE 5. Bythotrephes brevimanus Lilljeborg, 1901, females. A‒D: Lake Richi (Belarus). B. cederströmii Schödler, 1877, females. E, F: Lake Nizhnee Nilm-ozero (Russia). A, B, pseudognathobase of tl III and tl IV, respectively (pores arrowed). C, claws of postabdomen and caudal process. D, surface of caudal process with minute spinules. E, apical end of lower antennal branch. F, armament of distal end of third segment of upper antennal branch. Scale bars: 100 µm (C), 10 µm (A, D‒F), 5 µm (B).