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Spermatogenesis in L4 hermaphrodite of Bursaphelenchus okinawaensis. (A and B) Spermatogenesis in the proximal gonad. (C and D) Transition from spermatogenesis to oogenesis. (E and F) The spermatids are pushed into the spermatheca by the first oocyte during the first ovulation. Vu, vulva; Sp, spermatid; Rb, residual body; Spc, spermatocyte; Spt, spermatheca. Scale bar represents 10 μm.
