Key to the Genera

North American Scorpions

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Couplet 1

Pedipalp patella lacking ventral trichobothria (Fig. 1); inferior margin of movable finger of chelicera bearing two large accessory teeth (Fig. 2). . . . .Go to Couplet 2


Pedipalp patella with two or more ventral trichobothria (Figs. 3-8); inferior margin of movable finger of chelicera variable, but never with two large accessory teeth (Figs. 9-15). . . . .Go to Couplet 4






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