. "The chemical reactions and pathways resulting in the formation of ommochromes, any of a large group of natural polycyclic pigments commonly found in the Arthropoda, particularly in the ommatidia of the compound eye." . . . . . . . "ommochrome biosynthetic process" . "ommochrome anabolism" . "ommochrome biosynthesis" . "ommochrome formation" . "ommochrome synthesis" . . .