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Calendar
BugGuide Gathering
Smoky Mountains
University of Tennessee Biological Field Station
August 8-10, 2008
Details...
 
Photos from the last gathering (Minnesota 2007)

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Genus Orthosoma

Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga (Water, Rove, Scarab, Longhorn, Leaf and Snout Beetles)
Superfamily Chrysomeloidea (Long-horned and Leaf Beetles)
Family Cerambycidae (Longhorned Beetles)
Subfamily Prioninae
Tribe Prionini
Genus Orthosoma
Numbers
Nearctica.com lists one North American species.
Identification
Eleven fimbriate antennomeres (antenna segments). Similar to Derobrachus, but can be differentiated as follows;

Antennomere 3 distinctly longer than 1 and 2 combined,
about as long as 4 and 5 together (left) ......... Derobrachus

Antennomere 3 equal in length to 1 and 2,
shorter than 4 and 5 (right) ............................. Orthosoma

(Note: Antennomere (Antenna segment) 2 is greatly reduced in both)

Print References
1996. Chemsak, A.J. Illustrated Revision of the Cerambycidae of North America. Vol. I, Subfamilies Parandrinae, Spondylidinae, Aseminae, Prioninae. Wolfsgarden Press, Burbank, ix+150pp., 10 pls.