Figure 7
From: Invertebrate neurophylogeny: suggested terms and definitions for a neuroanatomical glossary
Bicellular eyes (ocelli). Receptor cells are labelled blue and supportive cells are labelled green. A. Larval eye in a trochophore of Platynereis dumerilii (Annelida). Eye cavity communicates with exterior via a small pore (arrowhead). [TEM micrograph. Manually labelled.] B. Adult eye of Protodrilus oculifer (Annelida) composed of two cells. Arrowheads point to junctional complexes sealing the extracellular cavity formed by the photoreceptor cell and the pigment cell. [TEM micrograph. Manually labelled.] Abbreviations: cu = cuticle; mv = microvilli; n = nucleus; pc = pigment cell; prc = photoreceptor cell. Originals: G. Purschke.