accessory pigment cells
From ZooTerms (Dictionary of Invertebrate Zoology)
accessory pigment cells: (Arthropoda: Insecta) As many as twenty-four cells that surround the retinulae of a compound eye; in superposition eyes the pigment granules assume different positions in light and darkness; also known as secondary pigment cells, secondary iris cells, iris pigment cells and outer pigment cells.
