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Subphylum Hexapoda (Body Structures (wings (1 pair (may be hardened &…

- - - - one pair of chemosensory antennae
      - ocelli
      - compound eyes
      - mandibles
        
        variety of feeding modes
        
        biting & chewing
        
        sucking (piercing or siphoning)
        
        sponging
      - mouthparts
        
        labrum (upper lip)
        
        labium (lower lip w/ palps)
        
        paired mandibles
        
        paired maxillae w/ palps
        
        single hypopharynx in middle
    - - pro, meso, & meta
      - if present, wing (extensions of cuticle)
        
        on 2nd &n 3rd segments
      - each w/ pair of uniramous walking legs
        
        attached to body at coxa
        
        trochanter
        
        femur
        
        tibia
        
        tarsus (foot)
  - - - may be hardened & used as a cover = elytra
- - - - copulatory organs
      - spermatophores
  - - - change in body form in series of stages
      - reduces competition b/w adults & juveniles
    - - egg
        
        juvenile (mini sexually immature adults)
        
        wingless adults & sexually mature
      - silverfish
      - typical of wingless, primitive insects
    - - egg
        
        nymph
        
        molt and wings get larger
        
        adults w/ functional wings & sexually mature
    - - egg
        
        larva w/ no wings
        
        pupa
        
        sexually mature adult emerges w/ wings fully formed