Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Photo#143216
furrowed pronotum carabid - Acupalpus indistinctus

furrowed pronotum carabid - Acupalpus indistinctus
Medford, (~25 miles east of Philadelphia, PA) Burlington County, New Jersey, USA
June 11, 2007
Size: ~3.8mm
looked like just another small black ground beetle until under some magnification I saw the furrowed pronotum. Hopefully that should narrow it down a little.

came to UV light

Images of this individual: tag all
furrowed pronotum carabid - Acupalpus indistinctus furrowed pronotum carabid - Acupalpus indistinctus furrowed pronotum carabid - Acupalpus indistinctus furrowed pronotum carabid - Acupalpus indistinctus furrowed pronotum carabid - Acupalpus indistinctus

Moved
Moved from Stenolophina.

what makes it look special,...
...is its wide head; large bulging eyes; and rather robust digging pro- & mesotibiae. i also suspect it to be but a melanistic variant of what you've had here:

Moved from Harpalini.

 
a working hypothesis: A. indistinctus Dej.
i hope i found this peculiar large popeyed head in D&A key couplet 8(3) -- what do you think, Tim and Peter?

 
vague couplet
After re-reading the description for A. indistinctus, I'd certainly agree with your determination on the "typical" looking one. Fits it to a T.

As for the key couplet, I personally can't see the diff between the head/eyes of indistinctus and the images we currently have for the other Acupalpus sp. Especially true for the images currently under A. testaceous. Am I misunderstanding the differance the couplet is trying to employ? Or did we put these in the wrong place?

Either way, seems like I need to watch these "smallish Harpalini" better, as certainly more than one species has been turning up in the backyard.

Thanks v, (and Peter)
Tim

 
they do look different to me, honest...
but the name indistinctus may have been chosen for a reason, too...

Moved
Moved from Harpalinae.

Moved
Moved from Ground Beetles. Agree with Boris, this is a Harpalinae.

small Harpaline
?Brady*cellus/?Acu*palpus