Discover Life in America
Great Smoky Mountains National Park
Illustrated Key to the Orders of Arachnida
Palps not modified to pincers
Without silk producing spinnerets
Without a waist or petiole: abdomen broadly joined to cephalothorax
Abdomen distinctly segmented ventrally. All mobile life stages with 4 pair of legs
OPILIONES (Harvestmen or Daddylonglegs)
Abdomen not distinctly segmented. Some individuals with 6 or fewer pairs of legs; legs sometimes represented only by setae
ACARI (Mites and Ticks)
With a petiole
With spinnerets
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Palps modified to form pincers
PREVIOUS PAGE: Scorpions and Pseudoscorpiones
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| Orders of Arachnida, page 3