Key to the Genera

North American Scorpions

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Couplet 4

Telson always bearing a papillate subaculear tubercle covered with whitish microsetae (Fig. 18); movable finger of chelicera with one superior subdistal tooth, ventral serrula never present (Fig. 9). . . . .Go to Couplet 5


Telson usually without a subaculear tubercle (Fig. 19), or if subaculear tubercle is present, it is usually spinoid and never bears numerous whitish microsetae; movable finger of chelicera bearing two superior subdistal teeth, serrula variable (Fig. 11-15), or if only one subdistal tooth is present, then a conspicuous serrula is also present (Fig. 10). . . . . .Go to Couplet 6




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