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Holoptic arrangement

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Holoptic refers to one of the ways in which the arthropod eye develops, particularly the eyes of various species of insects. Unlike dichoptic and cycloptic eyes, holoptic eyes meet along the median dorsal line of the head, in many species nearly covering the exterior of the head. Holoptic eyes are typical of several Dipteran males, in particular some Syrphidae, Tabanidae, Pipunculidae, and Acroceridae. Some other insect orders include species with holoptic males, and there are some in which the females are holoptic as well, include the Coleoptera, Anisoptera, and Archaeognatha.

Holoptic eyes of a male syrphid (Eristalinus taeniops)
Holoptic eyes of a male syrphid (Eristalinus taeniops)
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This article is adapted from the Wikipedia article Holoptic arrangement, written by its contributors and licensed under CC BY-SA 4.0. Fathomly has changed the layout, removed citation markers, navigation and maintenance notices, and adjusted punctuation. This adapted version is shared under the same license. For references, see the original article.

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