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

PREVIOUS PAGE: Spiders

Palps modified to form pincers

PREVIOUS PAGE: Scorpions and Pseudoscorpiones


Discover Life in America | Flora & Fauna | GSMNP Checklists | Orders of Arachnida, page 3