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

Upcoming Events

BugGuide is a National Moth Week Partner. How to add your National Moth Week 2021 photos. July 17-25.

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

National Moth Week 2020 photos of insects and people.

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

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

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

Previous events

Mystery beetle - Anorus piceus

Mystery beetle - Anorus piceus
Anza-Borrego Desert State Park, San Diego County, California, USA
May 4, 2009
Size: Bl about 10 mm
This beetle was found dead on Buckhorn cactus in south Culp Valley. We tried to keep the specimen but it was too fragile. It may be that the tarsal formula is 5-5-4. The closest I could come was an Oedemeridae, but the pronotum seems wrong.

Images of this individual: tag all
Mystery beetle - Anorus piceus Mystery beetle - Anorus piceus

Moved from Cebrioninae.

nice! we'll move it deeper -- in due time

Anorus probably piceus
It has been so identified by Michael Caterino and as Anorus near piceus by Albert Allen, in the closely related family Dascillidae. Allen also adds to check out termite colonies in wood and decaying logs and other such sites and you might find a flightless female.

Genus Aplastus?
What do you think of genus Aplastus? In Arnett's 2002 American Beetles, he lists only five genera in subfamily Cebrioninae. Three don't occur in California (and I checked the body build of each, which was not like ours). Of the two remaining genera, the key indicates that one genus, Euthysanius,has antennae pectinate in males, strongly serrate to subpectinate in females. The other genus, Aplastus has the antennae narrowly to strongly serrate in both sexes. The antennae on the above photo are definitely narrowly and weakly serrate.

A click beetle!
This is the first in this family that we have found in Anza-Borrego, although they are fairly common where we live in Colorado. I'll look into this subfamily Cebrioninae. Thanks so much, v belov, for a beetle we've puzzled over.

Comment viewing options
Select your preferred way to display the comments and click 'Save settings' to activate your changes.