Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

Discussion, insects and people from the 2018 BugGuide Gathering in Virginia, July 27-29

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

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa

Photos from the 2010 Workshop in Grinnell, Iowa

Photos from the 2009 gathering in Washington


Family Iuridae

FORD* Scorpion - Anuroctonus pococki - male Hadrurus sp. - Hadrurus obscurus Burrowing scorpion Anuroctonus phaiodactylus - Anuroctonus pococki - male Scorpion - Centruroides exilicauda or Centruroides sculpturatus - not sure? - Anuroctonus pococki Hadrurus arizonensis? - Hadrurus arizonensis California swollenstinger scorpion - Anuroctonus pococki California swollenstinger scorpion - Anuroctonus pococki Hadrurus obscurus pallid morph - Hadrurus obscurus - male
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Order Scorpiones (Scorpions)
Family Iuridae
Synonyms and other taxonomic changes
In 2003, Soleglad & Fet (S&F) rearranged the subfamilies Caraboctoninae (genera Caraboctonus, and Hadruroides) and Hadrurinae (genera Anuroctonus and Hadrurus) into the new family Caraboctonidae based on their cladistic evidence. The methods used for this and other phylogenetic changes in the Order Scorpiones by S&F were found to be flawed by cladists Prendini & Wheeler (P&W; 2005). P&W discussed in detail the problems with the methods S&F developed and used, subsequently returning the taxonomic changes proposed by them to their previous positions. One of the most important characters that is exclusive to all of the members of the family Iuridae is an enlarged tooth on the internal margin of the cheliceral movable finger. (In the American genus Anuroctonus, this tooth is present only in juveniles.)
Explanation of Names
Iuridae Thorell 1876
2 subfamilies (Iurinae, Caraboctoninae), 6 genera, 36 spp.(1); 2 genera in our area: Anuroctonus (1 sp.), Hadrurus (3 spp.)
Western North America to western South America; southwestern Eurasia.
Print References
Francke O.F., Soleglad M.E. (1981) The family Iuridae Thorell (Arachnida, Scorpiones). The Journal of Arachnology 9: 233–258.
Prendini L., Wheeler C.W. (2005) Scorpion higher phylogeny and classification, taxonomic anarchy, and standards for peer review in online publishing. Cladisitics 21: 446-494.
Sissom W.D. (1990) Systematics, biogeography and paleontology. In: Polis G.A. (Ed.) The biology of Scorpions. Stanford University Press, Stanford, CA, pp. 64–160.
Sissom W.D., Fet V. (2000) Family Iuridae Thorell, 1876. In: Fet V., Sissom W.D., Lowe G., Braunwalder M.E. (Eds.) Catalog of the scorpions of the world (1758–1998). The New York Entomological Society, New York, pp. 409–420.
Soleglad M.E., Fet V. (2003) High-level systematics and phylogeny of the extant scorpions (Scorpiones: Orthosterni). Euscorpius 11: ii+1–175.