Fig. 21 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. 21. Light micrographs through anal glandular tissue of mature male Bryconadenos tanaothoros. A, part of anal gland from a male of SL 36.6 mm (USNM 352061); bar, 100 µm. B, High magnification of the anal gland of a male of SL 39.8 mm (USNM 352061) in the area of cell release showing a degenerating cell (arrow) and a depression (*) remaining after cell release; bar, 10 µm.