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Classes of Arthropods
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Anatomy
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OcelliCompoundEye
Cephalothorax
Abdomen
HeadThoraxAbdomen
Antennae
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Arachnida
• Antennae absent
• Spiders, ticks, mites, scorpions, etc.
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Black Widow Spider
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Brown Recluse Spider
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Crustacea
• Two pair of antennae present
• Crawfish, crabs, sowbugs, etc.
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Insecta
• One pair of antennae
• Three pairs of legs
• Beetles, butterflies, bees, etc.
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Chilopoda
• Many pairs of legs with one pair of legs per body segment
• Poisonous fangs at end of body
• Centipedes
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Diplopoda
• Many pairs of legs with two pairs of legs per body segment
• Millipedes
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