Nygma

Nygma (plural Nygmata) are spots on the wings of certain insects which have a peculiar dense cuticular structure. They are found only in the wings of endopterygotes but found only in some insect groups. Nygmata are found in caddisflies, scorpionflies, saw-flies and in some families of Neuroptera (eg. Megaloptera and Ithonidae). The function of nyg...
Found on http://en.wikipedia.org/wiki/Nygma
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