Figure 24
From: Invertebrate neurophylogeny: suggested terms and definitions for a neuroanatomical glossary
Ommatidia in three different Maxillopoda (Crustacea). A, B. Argulus foliaceus (Branchiura). A. Overview. B. Transverse section through the rhabdom. Retinula cell between two cone cell processes. Eighth retinula cell not shown. C, D, E. Balanus crenatus (Cirripedia). C. Overview. D. Transverse section through the crystal cone and the distal pigment cells. E. Transverse section through the rhabdom. Three cone cell processes are present. F. Cypridina norvegica (Ostracoda). Note the extracellular space (arrow) between the distal pigment cells in all three species (A, C, D, F). Abbreviations: 1 = retinula cell; cc = crystalline cone; cgc = corneagenous cells; dpc = distal pigment cells; rc = retinula cell; rh = rhabdom. Modified from [85] based on various sources, with permission of Elsevier.