Fig. 2From: Reproductive cycle and gonad development of the Northern Argentinean Mesodesma mactroides (Bivalvia: Mesodesmatidae)Microphotography (colour pictures of full size: Herrmann et al. 2008) of male gonad stages of M. mactroides: a early active stage, b late active stage, c early ripe stage, d, e ripe stage, f partially spawned stage, g spent stage, h recovery stage (aw alveolar wall, gn goias, s sperm, sd spermatids, tf transverse fibre, scale bars are 100 μm)Back to article page