Male genital system of Nephila senegalensis in subadult (30d after penultimate moult) and adult stage (1d and 128d after final moult). View of the whole genital system and stained cross-sections of the testis. As evident in the section of the testis of the subadult male the spermatids developing in cysts and the lumen is filled with dense secretion. In the adult testis only somatic tissue is present whereas generative tissue is completely absent. Scale bar: 50 μm.
Schneider and Michalik BMC Evolutionary Biology 2011 11:197 doi:10.1186/1471-2148-11-197