FIGURE LEGENDS
FIGURE 1 External and internal aspects of Astyanax lacustris oocytes in SEM after cryofracture. a) Oocytes (Oo) surrounded by a connective membrane (Cm); b) Enlargement of an oocyte, with emphasis on theca cells (Tc), yolk vesicles (Y) inside and the zona pellucida (zp); c-d) Emphasis on the region of theca cells (Tc), with the yolk vesicles (Y) and the zona pellucida (zp) still visible; e) Evidence for yolk vesicles (Y) and zona pellucida (zp); f-g) Augmentation of the zona pellucida (zp) and its pores (P), with the presence of squamous follicular cells (Fc); h) Micropyle (Mp) and yolk vesicles (Y) on the oocyte wall; i) Some oocytes (Oo) and a connective membrane (Cm) surrounding them, with emphasis on the presence of blood vessels (bv) branching off this membrane.
FIGURE 2 Astyanax lacustris ovaries on SEM after cryofracture. a) Highlight for theca cells (Tc) and the zona pellucida (zp) in a more external view of an oocyte; b) Emphasis on the arrangement of theca cells (Tc); c) Connective membrane (Cm) surrounding the oocytes (Oo); d) Highlight for the connective membrane (Cm) and the network of blood vessels (bv) arranged in it.