A new species of Cybaeus L. Koch, 1868 (Araneae, Cybaeidae) with simple genitalia from central Japan is the sister species of C. melanoparvus Kobayashi, 2006 with elongated genitalia

Cybaeus koikei sp. nov., schematic drawing of epigyne and spermathecae based on female paratype (KUZ Z3743). A. Ventral view; CD, copulatory duct; CP, copulatory pore; FD, fertilization duct; PME, posterior margin of epigynal plate; SB, spermathecal base; SH, spermathecal head; SS, spermathecal stalk; B. Dorsal view; BG, Bennett’s gland; CD, copulatory duct; FD, fertilization duct; PP, primary pore; SB, spermathecal base; SH, spermathecal head; SS, spermathecal stalk. Duct from CP to before SH colored in red; SH to before SB colored in blue; SB colored in green. Scale bar: 50 µm.