FIGURE 4 in The genus Leptoplana (Leptoplanidae, Polycladida) in the Mediterranean basin. Redescription of the species Leptoplana mediterranea (Bock, 1913) comb. nov.

FIGURE 4. Embryonic development in L. mediterranea. (A) Embryo at the 1-cell stage. (B) Contortion of the egg during restriction of the polar bodies (arrowhead). (C) Contortions (blebbing) of 1-cell stage embryos. (D) 2-cell stage. (E) 4-cell stage. (F) 8-cell stage. (G) 12-cell stage. (H) Presumptive mesentoblast (arrowhead). (I) Divided presumptive mesentoblast (arrowheads). (J) Two-eyed (arrowhead) embryo. (K) Four-eyed (arrowhead) embryo. (L, M) Six-eyed and ten-eyed embryo (N, O) Hatched twelve-eyed juvenile with yolk-filled gut branches (arrowhead). Anterior is left. b: prominent brain, ph: posterior pharynx. Scale bars: 0.05 mm