Aranea General Characteristics | Free Biology Notes

Aranea General Characteristics

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General Characteristics of Aranea

• Body is divided into cephalothorax and abdomin
• The cephalothorax has 6 pairs of appendages
  • First set of appendages chelicerae
  • 2nd set is the pedipalps
  • Remaining 4 pairs are the walking legs
• Abdomen is unsegmented, rounded and without telson
• Abdomen have 3 pairs of spinning organs which produce threads for construction of web
• Arachnids do not have both wings and antennae
• Arachnids have actually simple eyes called ocelli
• Respiration by book lungs
• Excretion by Coxal glands and Malphigian tubules
• Development is direct

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