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For Insects, Spiders & Their Kin
For the United States & Canada
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Tribe Prionini

Brown Prionid - Orthosoma brunneum - male One day after the first monsoon storm, at night at the patio light - Derobrachus hovorei Palo Verde Root Borer - Derobrachus hovorei Prionus laticollis - male - female BG2544 E1009 - Prionus imbricornis Prionus arenarius Hovore - Prionus arenarius - male
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga
No Taxon (Series Cucujiformia)
Superfamily Chrysomeloidea (Longhorn and Leaf Beetles)
Family Cerambycidae (Longhorn Beetles)
Subfamily Prioninae
Tribe Prionini
22 spp. in 3 genera in our area, 74 spp. in 9 genera in the New World(1)
in our area, 20-70 mm; the world's largest beetle, Titanus giganteus (up to 170+ mm), is a member of this tribe
Partial key to genera adapted from(2)(3)(4):
1 Robust, antennomeres often overlapping, tips of apical segments produced into lobes ... Prionus
2 Elongated, sides almost parallel; apex (tip) of each antennomere simple
2a Antennomere 3 distinctly longer than 1 and 2 combined, about as long as 4 and 5 together (left) ... Derobrachus
2b Antennomere 3 equal in length to 1 and 2 combined, shorter than 4 and 5 (right) ... Orthosoma
Note: Antennomere 2 is greatly reduced in both genera. Also, antennomeres are fimbriate in Derobrachus but not in Orthosoma.
much of the world and NA
Works Cited
1.New World Cerambycidae Catalog
2.A Manual of Common Beetles of Eastern North America
Dillon, Elizabeth S., and Dillon, Lawrence. 1961. Row, Peterson, and Company.
3.Illustrated revision of the Cerambycidae of North America. Vol. I, Subfamilies Parandrinae, Spondylidinae, Aseminae, Prioninae
Chemsak A.J. 1996. Wolfsgarden Press, Burbank, ix+150pp., 10 pls.
4.The Cerambycidae of North America. Part II. Taxonomy and classification of the Parandrinae, Prioninae, Spondylinae, and Aseminae
Linsley E.G. 1962. University of California Publications in Entomology 19: 1-102, 1 pl.