Fig. 5

Galathowenia oculata. Cerebral eye, PRCs. TEM. a) Eye with ciliated PRCs (prc, boxed) between PSCs (psc). Somata of PRCs below cell bodies of PSCs; b) enlargement of left boxed area from a, two sensory dendrites with cilia (sc) emerging from apical depression of receptor cells, apical regions of PSCs are pigment-free, arrows point to junctional complexes; c) Somata of adjacent PRCs (prc) with numerous endo-membranes and mitochondria (m); d), Apex of PRC (prc), dendritic process with cilium and microvillus, note electron-lucent vesicles (v); e) Sensory cilium with the basal body (bb), accessory centriole (ce) and small rootlet (cr); f), Periphery of PRC process with numerous electron vesicles (v) and agranular ER, inset: enlargement of the boxed area with septate junction. Abbreviations: bb basal body, ce accessory centriole, cr ciliary rootlet, cu cuticle, if intermediate filaments, m mitochondrion, mv microvillus, np nucleus of PSC, nr nucleus of PRC, pg pigment granule, prc PRC psc PSC, sc sensory cilium, smv sensory microvilli, v vesicle, za zonula adherens