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False Darkling Beetle - Scotochroa atra

False Darkling Beetle - Scotochroa atra
Dixville, Coos County, New Hampshire, USA
July 30, 2008
Size: 4mm

thanks a ton guys -- great addition
makes perfect sense, too

Moved from Phloiotrya fusca.

comin round
What got you to S atra? (Just curious)

Phloiotrya fusca
now. P. vandoueri restricted to Palaearctic now.


pls see my spelling note below

Phloeotrya vandoueri
We have one 5 mm specimen (others up to 10), so maybe the 4 mm could be stretched to 5. This is not Ani*soxya - body proportions of Phloetrya more elongate, the pronotum is more coarsely punctured than elytra, and the antennomeres are more elongate.

great; isn't 'vaudoueri' the right spelling?
just a handful of sites gives 'vandoueri' and i believe that to be misprinted

Info page
Is the other in use enough to make it worth mentioning on the info page?

way too small for a Xylita... are there any 4-mm Xylita spp. arounf here? Anisoxya... i wish i had a better idea...

I'd need a ventral shot to have even a chance of going any further, as there looks to be about a dozen northeastern species in this size range and color.

From D&A, Xylita has 2: the smallest, X. livida, starts at 4.7mm (description sounds too dark). Anisoxya has only one: A. glaucula, 3.0-4.5mm. Seen from the MCZ here, at least looks like a good possibility. Also from the MCZ Scotochroa atra looks similar, but again is a little too dark.

This is the only picture
And I don't have the beetle any longer. I measured the beetle, and the measurement is accurate within .2mm. A. glaucula is a good possibility, but I don't think it's sure enough to move. Thanks Tim.

Thanks Robert
It looks like you're right calling this a False Darkling Beetle.

I don't think....
it is a false click beetle. The form, especially the pronotum doesn't fit with any species I know in NE USA. It looks like a member of the Melandryidae. Since the tarsi are a little out of focus, I cannot tell if the metathoracic legs contain 4 tarsal segments, typical for members of the superfamily Tenebrionoidea.

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