The primary derived characteristic of pterygotes is the presence of veined wings on the second (meso-) and third (meta-) thoracic segment.
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Appears under "Comprehensive Description"
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© David R. Maddison
Tree of Life web project
Tree of Life Web Project.2002. Pterygota. Winged insects.Version 01 January 2002 (under construction).http://dev.tolweb.org/Pterygota/8210/2002.01.01 in The Tree of Life Web Project, http://tolweb.org/
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