|
|
SEM of T. lineata zygote with both open (OC) and closed (CC) hull cupules. Sperm are attracted to open cupules and penetrate the hull at their bases (arrowhead). Bar = 40m m |
|
|
SEM of T. lineata sperm resting on a 0,45m m nucleopore filter. Acrosome (A) bent upward, anterior filament containing extension of nucleus (AF), and a portion of main body of nucleus (N). Bar = 0.45m m. Upper and Lower insets: Tip of sperm anterior filament showing apical (AG) and basal (BG) granules in acrosome seperated from tip of nucleus (N) by a basal plate (arrowhead). Cytoplasm (C). Bars = 0.08m m. |
|
|
Part of Fig. 1 at higher magnification showing sperm penetrating hull (arrowheads) within an open cupule. Bar = 10m m. |