Dragonfly Wings
Wing venation is endlessly varied. Studies of venation patterns allow entomologists to trace lineages and identify specimens.
Broad similarities across several groups probably stem from the ancestral winged insect. Models like the Comstock-Needham System name typical insect veins, and suggest what the ancestral wing veins may have looked like.
Image: Jean-Christophe/Flickr.
Backlink: http://www.wired.com/wiredscience/wp-content/gallery/insect-wings/dragonfly-stained-glass.jpg
