divided eyes

divided eyes
(ARTHROPODA: Insecta)
1. One in which the ommatidia in one area are different in size and often in pigmentation.
2. In many Odonata, the dorsal facets are nearly twice the diameter of the ventral ones.
3. In certain Hemiptera, the ventral facets are larger.
4. In some coleopteran water beetles, the eye is divided transversely.
5. In certain Ephemeroptera, the lateral pair are apposition eyes and the dorsal pair are superposition eyes.

Online Dictionary of Invertebrate Zoology. . 2005.

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