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July 10-12, 2009
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Genus Cysteodemus - Desert Spider Beetles

Spider beetle - Cysteodemus armatus Desert Spider Beetles - Cysteodemus armatus - male - female Cysteodemus - Cysteodemus wislizeni Cystodemus - Cysteodemus wislizeni Beetle of some sort? - Cysteodemus wislizeni blue/green bug - Cysteodemus wislizeni Cysteodemus armatus (white pruinose form) - Cysteodemus armatus Weird Bug- looks like from space! - Cysteodemus armatus
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga (Water, Rove, Scarab, Longhorn, Leaf and Snout Beetles)
Superfamily Tenebrionoidea (Fungus, Bark, Darkling and Blister Beetles)
Family Meloidae (Blister Beetles)
Genus Cysteodemus (Desert Spider Beetles)
Other Common Names
Desert Blister Beetle
Inflated Beetle (1)
Explanation of Names
Author of genus is LeConte, 1851.
cyst, =is, -o (G). The bladder; a bag
demas (G). A living body (2)
Numbers
Nearctica.com lists two species: armatus and wislizeni.
Size
C. armatus: 7-17 mm. C. wislizeni: 10-15 mm
Identification
Resemble spiders. Abdomen inflated, head small by comparison, legs long. Pronotum has spine on each side. Elytra in fused, forming a heavy, sculptured shell, so they are flightless. Published illustrations show C. armatus with light
Range
Includes southwestern United States. C. armatus is found in California, Arizona (print and Internet refernces). C. wislizeni is found from Texas to Arizona (3).
Habitat
Deserts
Print References
Powell and Hogue, p. 294, fig. 318--C. armatus (4)
White, plate 6--C. wislizeni (3)
Arnett and Jacques, #150--C. wislizeni (5)
Internet References
Arizona coleoptera--lists C. armatus.
Works Cited
1.Field Guide to Beetles of California
By Arthur V. Evans and James N. Hogue
2.Dictionary of Word Roots and Combining Forms
By Donald J. Borror
3.Peterson Field Guides: Beetles
By Richard E. White
4.California Insects
By Jerry A. Powell, Charles L. Hogue
5.Simon & Schuster's Guide to Insects
By Dr. Ross H. Arnett, Dr. Richard L. Jacques