part of develops from start stage end stage integument iridoblast argentum tapetum lucidum pigment cell iridophore iridocyte ZFA:0001090 iridosome A pigment cell derived from the neural crest. The cell contains flat light-reflecting platelets, probably of guanine, in stacks called reflecting platets or iridisomes. The color-generating components produce a silver, gold, or iridescent color. TAO:0009199 ZFA:0009199 zebrafish_anatomy CL:0000431 pharyngula:high-pec adult