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

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

TaxonomyBrowse
Info
ImagesLinksBooksData

Species Scarites subterraneus - Big-headed Ground Beetle

Pinned Specimen - Scarites subterraneus Scarites sp. - Scarites subterraneus Scarites - Scarites subterraneus Unknown Ground Beetle? - Scarites subterraneus Beetle - Scarites subterraneus BG2684 E6107 - Scarites subterraneus black beetle - Scarites subterraneus Scarites - Scarites subterraneus
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Adephaga (Ground and Water Beetles)
Family Carabidae (Ground Beetles)
Subfamily Scaritinae
Tribe Scaritini
Genus Scarites
Species subterraneus (Big-headed Ground Beetle)
Other Common Names
Pedunculate Ground Beetle
Synonyms and other taxonomic changes
Orig. Comb: Scarites subterraneus Fabricius 1775
Size
15-20 mm
Identification
Distinctive body form and huge jaws, elytra deeply striated.
As per Downie and Arnett, 1996, The Beetles of Northeastern North America, Volume 1, pp. 104-105, this species can be distinguished from the similar S. quadriceps by the shape of the antennal segments as noted below. The body length quoted by the authors for S. subterraneus is questionable in the opinion of Peter Messer. A better way to distinguish by size appears in the above key.
subterraneus: antennomeres 8-10 each as broad as long (moniliform).
quadriceps: antennomeres 8-10 each longer than broad (filiform).
Downie and Arnett also list a third species in the genus, S. lissopterus, but provide neither the ability to key it out nor a description. They list its distribution as: KS, NM, OK, TX, WI? [latter very unlikely according to Peter Messer].
Range
CA-FL-NY-SD / Ont. (Bousquet & Larochelle 1993)
Habitat
Under stones, leaf litter, etc., in soil
Remarks
Historically much taxonomic confusion existed at the specific level.
Guide TBA--PC. (Dillon, other print refs, e.g., Ciegler life cycle.)
ID TBA--PC. (Given taxonomic confusion, consider moving everything, including guide? to genus level. Check Ciegler on this.)
05/07/06--I have added species info from Downie and Arnett. Does this clear some taxonomic confusion or are there still issues w/ this genus? --Ethan Friedman
See key to Scarites species by Peter Messer that hopefully will resolve confusion.
Print References
Bousquet, Y. and A. Larochelle. 1993. Catalog of the Geadephaga (Coleoptera: Trachypachidae, Rhysodidae, Carabidae Including Cicindelini) of America North of Mexico. Memoirs of the Entomological Society of Canada, 167: 1-397.
Internet References
TAMU live adult image (Bastiaan Drees, Texas A&M U.)
Insects of Cedar Creek pinned adult image (John Haarstad et al, U. of Minnesota)
Torrey Pine.org adult image and common name reference [Pedunculate Ground Beetle] (Don McIntire, Torrey Pines State Reserve, California)
Ground Beetles of Canada preserved adult image (Henri Goulet, CBIF)
Systema Entomologiae (Fabricius), p.249 Original description of the species (in Latin)
pinned adult image of S. quadriceps (Kirk Larsen, Luther College, Iowa) - right-click the photo and select "View Image" to see an enlarged version showing the elongated antennomeres 8-10