Visual organization, morphological characteristics and optical properties of the stemmata in the larvae of the dobsonfly corydalus armatus Hagen, 1861 (Megaloptera: Corydalidae)

The stemmata are the photosensitive organs of several groups of holometabolous immature insects. They are single chamber eyes equipped with a concave retina and a single lens. The arrangement on the head is highly diverse, in some groups with image resolving capability; and in other cases, only with...