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Upcoming Events

Discussion of 2018 gathering

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa

Photos from the 2010 Workshop in Grinnell, Iowa

Photos from the 2009 gathering in Washington


Species Crossidius discoideus

longhorn - Crossidius discoideus Rd&Blk Longhorn - Crossidius discoideus - male Crossidius discoideus Cerambycid of sorts.. - Crossidius discoideus Crossidius discoideus  - Crossidius discoideus Crossidius discoideus, female? - Crossidius discoideus - female Cerambycid of sorts.. - Crossidius discoideus Crossidius pulchellus LeConte - Crossidius discoideus
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga (Water, Rove, Scarab, Long-horned, Leaf and Snout Beetles)
No Taxon (Series Cucujiformia)
Superfamily Chrysomeloidea (Long-horned and Leaf Beetles)
Family Cerambycidae (Long-horned Beetles)
Subfamily Cerambycinae
Tribe Trachyderini
Subtribe Trachyderina
Genus Crossidius
Species discoideus (Crossidius discoideus)
Synonyms and other taxonomic changes
Callidium discoidum Say 1824
3 subspecies, all in our area(1)(2). Names (with synonyms indented) and links to original descriptions are as follows:
    discoideus (Say) 1824 [Orig. Description]
          pulchrior Bland, 1862 [Orig. Description]
    blandi Casey, 1893   [Orig. Description]
    sayi Casey, 1912 [Orig. Description ]
          sayi bilenticulatus Casey, 1912 [Orig. Description]
          submetallicus Casey, 1912 [Orig. Description]
Taken together, the remarks Casey included with his 1912 description of C. sayi and 1893 description of C. blandi, indicate the following:
1) Subspecies sayi always has some black maculation on the pronotum...varying from two distinct small and somewhat oblique spots, to larger spots which can become confluent, forming an inverted-"v" shape. The other two subspecies have pronotum entirely red, with no black on the pronotum. 2) Subspecies blandi differs from discoideus in its: smaller size; more narrow form; more sparse punctation (especially the pronotum); and more rounded apex (the apex of discoideus is described as "feebly truncate").
w. N. Amer.(2)
Associated with composites in the genera Gutierrezia & Haplopappus; larvae bore in the root crown while adults are found on the flowers and foliage. --T.C. MacRae
Internet References
Curated images of 1) ssp. discoideus; 2) ssp. blandi; and 3) ssp. sayi...from "The Photographic Catalog of the Cerambycidae of the New World"(2).