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Upcoming Events

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

National Moth Week was July 23-31, 2022! See moth submissions.

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Previous events


Genus Paruroctonus

California Common Scorpion - Paruroctonus silvestrii - female California Common Scorpion - Paruroctonus silvestrii CA Common Scorpion - Paruroctonus silvestrii Scorpion - Paruroctonus silvestrii Scorpion under rock - Paruroctonus Uroctonus? - Paruroctonus silvestrii Serradigitus - Sawfinger Scorpion? - Paruroctonus boreus Scorpion - Paruroctonus
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Order Scorpiones (Scorpions)
Family Vaejovidae
Genus Paruroctonus
PAR-you-ROCK-ton-us, or PAIR-you-ROCK-ton-us.
3 species groups, further subdivided into 7 "microgroups".
30 species.
Adults range in size from 30 mm (Paruroctonus luteolus) to about 70 mm (several spp.).
Sand-dwelling species are distinguished by a row of setae (hairs) on the tarsal segments of the legs. This row of setae is called a bristlecomb and is in most species. Otherwise, they have large, robust pedipalp chelae (hands), and usually a slender metasoma (tail). An important character on the metasoma is the dorsal carinae (ridges) do not terminate with an enlarged granule or spine (seen in Vaejovis and other vaejovid genera except the punctipalpi group of the genus Vaejovis). The median eyes are typically large.
Paruroctonus are found in all the western states west of and including Texas, New Mexico, Colorado, Wyoming, South Dakota, and North Dakota, and into SW Canada and northwestern Mexico. The greatest diversity is in the southwestern deserts.
Most species are restricted to active sand dunes, but a few species occur in most other habitats. Paruroctonus silvestrii is found from coastal dunes to mountain pine forests in California and Baja California; P. boreus is the widest-ranging vaejovid scorpion and is found in many habitats from northern Arizona to southern Saskatchewan, Alberta, and British Columbia, Canada.