ENWC205 Lecture Notes - Lecture 3: Elytron, Aedeagus, Apterygota

• School: University of Delaware
• Department: Entomology and Wildlife Conservation
• Course: ENWC205
• Professor: Deborah Delaney

Document Summary

Little hairs grab pollen and compress into ball. Thick rounded legs to wrap around substrate. Wing veins - give structure/support, blood circulation. Costa, subcosta, radius, media, cubitus, anal (do not need to memorize) No wings: apterygota (ptery - wing, a- none) True flies (diptera): one pair of front wings. Halteres - hind wings reduced to club-like balancing organs. One pair functional, forewings modified as cover: beetles (coleoptera) Half chitinous covering (elytra), half functional membranous. Primitive non-folding - wings locked in straight position. Lobe extensions to aid gliding of perches. Lobe extensions of aquatic insects for swimming or gill covers. Lateral growths to impress females in courtship. Only 4 known groups of animals have achieved true flight. Spiracles - allow oxygen to diffuse into. Eggs -> nymph (aqua) or naiad (terra) -> adult. Winged insects (wings may be secondarily lost) Except size, sexual maturity, and adults have flying wings. Egg -> larva(e) -> pupa -> adult.