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Genus Callilepis

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Classification
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 Callilepis
Synonyms and other taxonomic changes
Numbers
There are 7 species in BugGuide's range (North America north of Mexico).
Size
Body length 2.5-7mm(1)
Identification
The "translucent lamina on the cheliceral retromargin" (Dondale and Platnick, 1992), is a diagnostic feature for the genus Callilepis:
Range
The following ranges are taken from a combination of (1), (2), & (3) (for quick reference, Canadian ranges are in bold):
Callilepis chisos: eastern Arizona, New Mexico, Colorado, and western Texas.
Callilepis eremella: western United States and southern British Columbia.
Callilepis gertschi: southwestern United States (e.g. AZ, NM, TX).
Callilepis gosoga: California and northern Baja California.
Callilepis imbecilla: Illinois and southernmost Ontario, south to Texas and Florida (no records for the northeastern states).
Callilepis mumai: southwestern United States from Utah south to Mexico (e.g. UT, AZ, NM).
Callilepis pluto: western Northwest Territories to Maine, south to Oregon, Colorado and Alabama (Canadian portion includes NT, BC, AB, SK, MB, ON, QC, & NS(3)).
Habitat
Dry places such as rocky hillsides, quarries, and sandy beaches. They use surface debris as daytime shelter.(1)
Works Cited
1.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.
2.A revision of the Holarctic spider genus Callilepis (Araneae, Gnaphosidae)
Norman Platnick. 1975. American Museum Novitates 2573:1-32.
3.Checklist of the spiders (Araneae) of Canada and Alaska
Paquin, Buckle, Duperre, & Dondale. 2010. Zootaxa 2461: 1–170.