Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
 

Register · Log In
HomeGuideID RequestRecentFrassForumsDonateHelp
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Calendar
Upcoming Events

Registration is open for the 2024 BugGuide gathering in Idaho July 24-27

Moth submissions from National Moth Week 2023

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

Photos of insects and people from the 2019 gathering in Louisiana, July 25-27

Photos of insects and people from the 2018 gathering in Virginia, July 27-29


Previous events
TaxonomyBrowse
Info
ImagesLinksBooksData
Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Polyphaga » Series Cucujiformia » Longhorn and Leaf Beetles (Chrysomeloidea) » Longhorn Beetles (Cerambycidae) » Cerambycinae » Trachyderini » Trachyderina » Crossidius » Crossidius discoideus

Species Crossidius discoideus

Classification · Synonyms and other taxonomic changes · Numbers · Identification · Range · Remarks · Internet References · Works Cited
Beetle - Crossidius discoideus - female Rd&Blk Longhorn - Crossidius discoideus - male Crossidius discoideus Crossidius discoideus - Crossidius discoideus Crossidius discoideus, female? - Crossidius discoideus - female Checkered beetle? - Crossidius discoideus Beetle - Crossidius discoideus Beetle 13mm - Crossidius discoideus
Classification
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 Cerambycinae
Tribe Trachyderini
Subtribe Trachyderina
Genus Crossidius
Species discoideus (Crossidius discoideus)
Synonyms and other taxonomic changes
Callidium discoidum Say 1824
Numbers
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]
Identification
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").
Range
w. N. Amer.(2)
Remarks
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).
Works Cited
1.Checklist of the Oxypeltidae, Vesperidae, Disteniidae and Cerambycidae (Coleoptera) of the Western Hemisphere
Bezark L.G., Monné M.A. 2013. 470 pp.
2.New World Cerambycidae Catalog
Contributed by Phillip Harpootlian on 27 August, 2007 - 10:56am
Additional contributions by Beatriz Moisset, Mike Quinn, Aaron Schusteff, v belov
Last updated 13 December, 2015 - 8:58pm

Disclaimer: Dedicated naturalists volunteer their time and resources here to provide this service. We strive to provide accurate information, but we are mostly just amateurs attempting to make sense of a diverse natural world. If you need expert professional advice, contact your local extension office.

Contributors own the copyright to and are solely responsible for contributed content.
Click the contributor's name for licensing and usage information.
Everything else copyright © 2003-2024 Iowa State University, unless otherwise noted.

Bugguide is hosted by:

Plant Pathology, Entomology and Microbiology at Iowa State University logo

Printer Friendly Version 		Terms of Use
Privacy Statement
Site Map
Contact