ENT207 Lecture Notes - Lecture 4: Notum, Habitat, Mesothorax
28 Apr 2016
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The locomotory center if the insect and consists of 3 segment: prothorax: bears the forelegs, mesothorax: bears the middle legs and forewings, metathorax: bears the hindwings and legs. Segments sclerotized to prevent flexing of body wall during movement of appendages: tergum (notum): dorsal sclerite, sternum: ventral sclerite, pleura: lateral sclerite. History: insects are the only winged invertebrates, first organisms to fly 410 mya, insect flight thought to be monophyletic, arose only once. Two major lines of flying insects: paleoptera: ordonata (dragonflies); ephemeroptera (mayflies); extinct orders, neoptera: extant orders. Advantages: enabled specialization of adult and immature stages, enabled long distance migration. Monarch butterfly, desert locust, (pests): velvetbean caterpillar and diamond black moth: ecology: Dispersal to different spring and summer hosts; utilize them at nutritional peaks. Complexes insects" relationship with plants: morphology. Led to the reconstruction of insect structure including changes in musculature, sensory organs and reproductive organs. Enabled specialization of adult and immature stages.
