Fig. 1. Larval and adult eye development in Platynereis dumerilii. Ultrastructure of larval (A, 24 hours) and adult (B,C) eyes at 72 hours (B) and fully grown (C). Redrawn from EM micrographs (A,B; data not shown) and (C) after Fischer and Brökelmann (Fischer and Brökelmann, 1966). Yellow, rhabdomeric photoreceptor cells; green, pigment cells. (D) Photomicrograph of 24 hour trochophora showing the yellow natural pigment of larval eyes (white arrows). (E) Larval (white arrows) and adult eyes at 72 hours. Green autofluorescence marks pigment cells of adult eye (black arrow). (F-H) Staining of axonal scaffold with anti-acetylated tubulin antibody. Apical view showing larval axons and enervation of larval eyes at 36 hours of development (F). Axonal scaffold at 48 hours (G) and 72 hours (H), apical views. Black arrows, adult eyes. Abbreviations: aen, adult eye nerve; len, larval eye nerve; oc, optic commissure; plp, palpae anlagen; prn, prototroch ring nerve.
