pigment cell secondary pigment cell fly_anatomy.ontology FBbt:00004232 VFB:FBbt_00004232 Interommatidial pigment cell that lies between the edges of adjacent ommatidia. It contains the red screening pigment pteridine, as well as ommochrome granules. Together with tertiary pigment cells, it secretes the lens between the facets. interommatidial cell