Fig. 15 in Putative relationships among inseminating and externally fertilizing characids, with a description of a new genus and species of Brazilian inseminating fish bearing an anal-fin gland in males (Characiformes: Characidae)

Fig. 15. Light micrographs through gonads of Bryconadenos tanaothoros. A, mid-sagittal section through testis of mature male, SL 36.6 mm (USNM 352061); sg, spermatogonial region; arrows, spermatozeugmata within storage region of testis; bar, 200 µm. B, testis storage region of same specimen showing well-organized spermatozeugmata (z); bar, 20 µm. C, section through ovary of mature female, SL 34.4 mm (USNM 352061), showing spermatozoa (sp) within ovarian lumen; o, oocyte cytoplasm; bar, 10 µm.