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Photo#47321
small beetle - Atomaria atrata

small beetle - Atomaria atrata
Bolton, Worcester County, Massachusetts, USA
April 9, 2006
Size: 1.7mm

Atomaria atrata Reitter --det. C. Johnson
Moved from Atomaria patens.

Thanks =v=
Moved from Atomaria.

suspect A. patens (Casey)
based on D&A

 
A. wollastoni Sharp?
Hi, could this be Atomaria wollastoni Sharp rather? The specimen does fit A. patens in Casey's original description, but the darker coloration at the apex and middle of the basal 1/3 of the elytra seems to correspond with A. wollastoni, based on the Atomariinae of Atlantic Canada .

Moved
Moved from Caenoscelis.

Rather: Atomaria
Hi Tom!

Don pointed in the right direction, but the characters he points out are not decisisive. Close antennal bases and long first segment of them we find in many Atomaria also.
In Caenoscelis, the pronotum is sulcate laterally, and relatively flat, while it is more convex and only finely margined in Atomaria (of course, not very clear on the picture). The strong dorsal luster and rough puncturation of the elytra, however, also indicates Atomaria.

regards, Boris

Cryptophagidae: Caenoscelis sp.
Antennae close together, long thick first antennomere --> looks like a Caenoscelis.

 
Thanks Don
for a ton more identifications. Without your help, there'd be a lot more blank spaces in Bugguide.

Those antennae
tell me it's not a clicker. Pronotum not quite right anyway.

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