For the histological analysis, reproductive
systems from male adults were fixed for 12h in 2.5%
glutaraldehyde in 0.1 M sodium cacodylate buffer, pH 7.2
and post fi xed in 1% osmium tetroxide. They were then
dehydrated in increasing alcohol concentration and embedded
in Historesin® (GMA, Leica). Semithin sections were stained
with 1% sodium toluidine borate and amounted in Entelan®
(Merck). The analysis and photographic records were made
in an Olympus CX-31 microscope. For the anatomical
analyses, shortly after fi xing, some reproductive systems
were photographed under an Olympus CX-31 microscope
and an Olympus SZ40 stereoscopic microscope.