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Photo#301578
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
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.

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