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Genus Haplodrassus

Gnaphosid? - Haplodrassus bicornis - male Adult Female - Haplodrassus hiemalis - female Spider - Haplodrassus signifer - male Spider - Haplodrassus signifer - male Spider - Haplodrassus signifer - male Voucher Image - Haplodrassus signifer - female Voucher Image - Haplodrassus signifer - female Ground Spider - Haplodrassus - female
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Order Araneae (Spiders)
Infraorder Araneomorphae (True Spiders)
No Taxon (Entelegynae)
Family Gnaphosidae (Ground Spiders)
Genus Haplodrassus
Synonyms and other taxonomic changes
Explanation of Names
Chamberlin, 1922
9 species found in BugGuide's range (North America north of Mexico).(1)—accessed 23 Feb. 2014
Members of this genus are medium-sized, ranging from 3-10mm in body length.(2)
bicornis — British Columbia to Nova Scotia, south to Arizona and Virginia.(2)
chamberlini — southern Alberta, south to northern Mexico, east to Kansas and northwestern Texas.(2)
dixiensis — western United States from Oregon and Idaho south to Arizona.(3)
eunis — Alaska to the north shore of Lake Superior, south to California, Arizona, and New Mexico.(2)
hiemalis — Alaska to Newfoundland, south to Colorado and New Jersey (also Russia).(2)
maculatus — southern California and Baja California.(3)
mimus — United States from New Mexico east to New Jersey and Florida. Platnick & Shadab (1975) also noted that it's possible the New Mexico record was the result of mislabeling and, if that is the case, the distribution of H. mimus would then only be the eastern deciduous forests.(3)
signifer — Yukon Territory to Nova Scotia, south to Mexico and Florida (also Greenland, Europe, & Asia).(2)
taibo — southern California.(3)
Haplodrassus signifer is the most widespread species, found all over North America except for northernmost Canada (NT & NU) and Alaska.
Internet References
Images of preserved specimens at —
Works Cited
1.The World Spider Catalog by Norman I. Platnick
2.Insects and Arachnids of Canada Part 19: The ground spiders of Canada and Alaska : Araneae: Gnaphosidae
Norman Platnick & Charles Dondale. 1992. Research Branch, Agriculture Canada, Publ. 1875: 1-297.
3.A revision of the spider genera Haplodrassus and Orodrassus (Araneae, Gnaphosidae) in North America
Norman Platnick & Mohammad Shadab. 1975. American Museum Novitates 2583: 1-40.