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Great Smoky Mountains National Park

Illustrated Key to the Orders of Arachnida

Palps modified to large pincers

With the abdomen long and tipped by a stinger; pectines present ventrally
SCORPIONES (Scorpions)
With abdomen short and without stinger; without pectines
PSEUDOSCORPIONES (Pseudoscorpions)

Palps leg-like or very small and not formed into pincers

Spiders, Harvestmen, Mites, and Ticks

Discover Life in America | Flora & Fauna | GSMNP Checklists | Orders of Arachnida, page 1