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Arachnid Key (Spiders, Scorpions, Ticks and Mites)

Answering a few questions in the Arachnid Key will help you narrow down your order.

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Insect Dichotomous Key
Insect Anatomy
Starting with question #1, determine which statement (a or b) is true for your creature. Follow the directions at the end of that true statement until you are given the name of the Order your specimen belongs to.
1)
a. Arachnid has a tail or a stinger...
b. Arachnid has no tail or stinger...
...go to #2
...go to #3
2)
a. Tail is straight like a needle...
b. Tail curves with a stinger at the tip...
3)
a. Has enlarged pedipalps (claws)...
b. Lacks pedipalps (claws)...
...go to #4
...go to #5
4)
a. Arachnid is less than 5mm long & flat...
b. Arachnid is 8-51mm long & spider-like...
5)
a. Arachnid has regular legs...
b. Arachnid legs are thin/stilt-like
with "high" knees & body low to ground...
6)
a. Body is separated into a cephalothorax
& abdomen (i.e. has a waist)...
b. Body is oval-shaped & lacks a waist...
7)
a. Has 7 segments on each leg
& 1st pair of legs are not longer than rest...
b. Has some other number of segments
on each leg & 1st pair of legs are longer
than the rest...
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