Scorpions are arthropods in the class Arachnida. While there are more than 1400 species of scorpions worldwide, only 30 are capable of producing clinically significant envenomation. The only scorpion in the United States that is potentially lethal is the bark scorpion (Centruroides sculpturatus). This scorpion is found in the Southwest, especially Arizona. C sculpturatus scorpions are a tan-brown color and range from 1.3 to 7.6 cm in length.27
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