The histological study of gonad development for P. antipodarum showed early gonadogenesis when they reached 2 mm, at which point the primary oocytes increased in size (2.5 mm) (Figures 5A,5B) as well as the 1st order secondary oocytes (Figure 6A). At 3.5 mm, we observed a complete maturation of the gonad with a presence of all maturity stages (Figure 6B) and at 4.5 mm the embryos in the embryonic sac (Figure 7A). The maturation stages were still present at this size for
other individuals (Figure 7B).