oa Journal of the Entomological Society of Southern Africa - Corneus spots' in insects
The occurrence of small chitenous structures, called 'corneus spots', which occur on the membranous parts of some insect wings is briefly surveyed. Only four holometabolous orders possess these structures: Mecoptera, Neuroptera, Trichoptera and Hymenoptera. The detailed external morphology of corneus spots in selected examples from each order has been studied using light and scanning electron microscopy. It is tentatively suggested that corneus spots are either sensory or glandular organs.
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