Fig. 7.

Nulliparous stages, N1 (a) and N2 (b and c) of ovarian development for Bagrada hilaris (ov, ovary; gm, germarium; vt, vitellarium; f, follicle). In the N1 stage, the ovarioles are small and undifferentiated, appearing as simple tubes that were often highly tracheated. No follicular relics are present in the N1 age. In comparison, the N2 age is characterized by the ovarioles being differentiated into distinct follicles with the more proximal follicles appearing semitransparent to opaque depending on yolk quantity.