Figure 3

Larval types and juveniles of Polycladida. (A) Müller's larvae of a cotylean (Prosthiostomum siphunculus) and (B) an acotylean species (Planocera multitentaculata), both hatching with eight lobes and three eyes (two cerebral eyes and one epidermal eye). (C) Goette's larva of the acotylean Imogine mediterranea, hatching with four lobes and a cerebral and an epidermal eye. (D-E) Kato's larva of the acotylean Planocera reticulata, hatching with eight lobes and 12 eyes and being dorsoventrally flattened. (D) Ventral side with four lobes around the mouth visible, (E) from dorsal. (F) Directly developing juvenile of the acotylean Pseudostylochus obscurus, hatching with no lobes and four eyes. (G) Directly developing juvenile of an undetermined acotylean, hatching with no lobes and 12 eyes. All scale bars are 50 μm. Photograph (C) is courtesy of Mehrez Gammoudi.