Definitions

(Taxon-specific: Order Stomatopoda) Minute, unpaired light-sensitive organ on ocular plate between eyestalks (ocular peduncles). [Stachowitsch, 1992]
(Taxon-specific: Subclass Branchiura) On dorsal midline of carapace, one to three simple photosensitive structures. (See also compound eye).
(syn. median eye, ocellus) [Stachowitsch, 1992]
(Taxon-specific: Subclass Cirripedia) Unpaired median photosensitive organ in larvae (nauplius, cypris). May be retained under plates of adult barnacle. [Stachowitsch, 1992]
(Taxon-specific: Class Ostracoda) On dorsal surface of body near base of antennules, median unpaired photosensitive structure consisting of three ocelli. (See also compound eye). [Stachowitsch, 1992]
(Taxon-specific: Class Ostracoda) On dorsal surface of cephalic shield, median photosensitive structure consisting of three ocelli. [Stachowitsch, 1992]
(Taxon-specific: Order Euphausiacea) Small median photosensitive organ located between eyestalks (ocular peduncles) under rostrum.
See: Compound eye [Stachowitsch, 1992]