retinula

A cluster of pigment-containing photosensitive cells in each ommatidium of the compound eye of an arthropod.

In entomology, a group of combined retinal cells, bearing a rhabdom.

One of the group of pigmented cells which surround the retinophoræ of invertebrates. See Illust. under ommatidium.

One of the group of pigmented cells that surround the retinophorae of invertebrates.