Fig. 5
From: Ultrastructure of oogenesis in imposex females of Babylonia areolata (Caenogastropoda: Buccinidae)
Late vitellogenic oocytes (LVO) of B. areolata. a LVO of normal female showing Golgi body (G) and abundant electron-lucent vesicles (V). b Golgi body of LVO of imposex female beginning to encompass its vesicles. c Dense structure (asterisk) in LVO of imposex female. d Many fused whorls (asterisks) in LVO of imposex female. e Pre-yolk materials in a form of curly-shaped membranes (asterisk) surrounding the yolk body (Y). Insert: multi-vesicular body (arrowhead). f The electron-dense core of yolk body. g The fused membrane (asterisk) surrounding the core. h The mature yolk body with a clear envelope (asterisk). i Endocytotic pits (arrowheads) and endosomes (arrows). j Irregularly shaped endosomes (arrowheads). CG cortical granule, GV Golgi vesicle, M mitochondria, N nucleus. Scale bars = 0.5 μm (j), 1 μm (a–f, i, Insert) and 2 μm (g–h)