ZOO 115 Invertebrate Zoology

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ZOO 115 Invertebrate Zoology

• Phylum Arthropoda
• Subphylum Hexapoda

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Subphylum HexapodaGeneral Characteristics

• Includes insects and springtails.
• Three tagma
• head
• Thorax
• Abdomen
• 3 thoracic segments each with 1 pair of legs
• 1 pair of antennae
• 3 sets of jaws
• gas exchange via tracheae and spiracles
• Malpighian tubules

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Subphylum HexapodaTaxonomy

• Class Insecta
• Class Entognatha (includes springtails)
• mouthparts hidden - sunk into a depression on the
  surface of the head.

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Class Insecta

• Have successfully invaded virtually every
  terrestrial habitat and some marine
• They are predators, herbivores, scavengers,
  decomposers and parasites.
• 1 million sp.
• 200 million insects/human

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Class Insecta - Importance

• Agriculture
• pollination
• pests
• pest control
• Disease
• vectors
• Ecology food webs
• prey
• predators
• decomposers

80 of crops
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Class Insecta General Morphology

• Head

• Mouthparts

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Class Insecta General Morphology

• Thorax

• limbs

• wings

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Class Insecta - Locomotion
http//www.ndsu.nodak.edu/entomology/topics/moveme
nt.htm
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Class Insecta General Morphology

• Abdomen

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Class Insecta Internal anatomy

• Digestive system

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Class Insecta Internal Anatomy

• Circulatory system

http//basicentomology.ifas.ufl.edu
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