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Phidippus johnsoni, the red-backed jumping spider or Johnson jumping spider, is one of the largest and most commonly encountered jumping spiders of western North America. It is not to be confused with the unrelated and highly venomous redback spider ( Latrodectus hasselti ).
These reactions typically appear within minutes after a bite, the Mayo Clinic says. In some people, the reaction may look like a painful hive or a blister that forms within 24 hours of the bite.
Dr. Giangreco says ticks can prompt local reactions following a bite. The classic rash of Lyme's is called Erythema migrans. "It can be circular or oval shaped and have crusting," Dr. Giangreco says.
The spider bites that experts really worry about are bites from venomous spiders, particularly black widows and brown recluse spiders. A bite from one of these types of spiders can cause severe ...
Phidippus is a genus in the family Salticidae (jumping spiders). [1] Some of the largest jumping spiders inhabit this genus, and many species are characterized by their brilliant, iridescent green chelicerae .
Phidippus johnsoni; Metadata. This file contains additional information, probably added from the digital camera or scanner used to create or digitize it.
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