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2 red spotted black beetle - Brachiacantha subfasciata

2 red spotted black beetle - Brachiacantha subfasciata
Camp Grant Wash, SW of Dudleyville, Pinal County, Arizona, USA
November 14, 2010
Size: 4-5 mm approx
Small beetle, 2 red spots, on Desert Broom (Baccharis sarothroides), near water in canyon in Sonoran desert.

Images of this individual: tag all
2 red spotted black beetle - Brachiacantha subfasciata 2 red spotted black beetle - Brachiacantha subfasciata 2 red spotted black beetle - Brachiacantha subfasciata


cool; now i'm more inclined to believe it's an insect :)))
thanks for adding those suggestive pictures!

Moved from Frass.

Moved from Arthropods.

i would like to keep it
a real puzzler to me and i'm very curious to find out what this thing is; i'm sure other users will find it enlightening, too.
anyway, thank you for posting this, Lon -- maybe you could try to find more of these in the wild and take sharper pix from diff. angles, incl. ventral?
i have circulated the link among several experienced naturalists familiar with the sw. fauna

Thanks for your help. I'm sor
Thanks for your help. I'm sorry about the poor quality of the photos. I've posted a couple of other views, unfortunately very similar to the first. Please feel free to move these images to another category.

New species for the Guide!
Thanks for keeping 'em....we have no other photos of B. subfasciata, and these are a welcome addition!

i don't see enough to be sure it's an insect;
in any case, not a coccinellid; hope somebody recognizes the object

Moved from Cactus Lady Beetle.

Moved from ID Request.

I am finding a lot of Chilocorus cacti
in locations like you describe and at this time, but the shape of yours, if not distorted by the angle, doesn't look quite right for that sp. At second thought - that's probably it.

The very domed appearance and
The very domed appearance and lack of an expanded margin make me think its in Brachiacantha. The pattern and all black pronotum and head indicate that Brachiacantha subfasciata is a good candidate.

if spots extend to margin, I'd agree with B. subfasciata
I'm not saying I don't agree with it! I super-lightened one of the new pics in Photoshop and it looks like those markings may indeed extend to the lateral margin, rather than being discrete spots. In which case, B. subfasciata is the clear winner.

In two of the pictures I see
In two of the pictures I see the red spot extending all the way to the margin.

wow; thanks, Dennis
i can't even see the sulci between the elytra and the elytra & pronotum... and the overall shape appears almost globular
i honestly can't tell which way is the head

I believe its heading to the
I believe its heading to the left of the picture. You can just make out the sulci if you squint! ;-) In the additional pictures you can see that the edges of the pronotum are ivory, indicating that this is a male. I still don't see any of the lateral extension of the elytral edge that I would associate with Chilocorus cacti.

white anterior = not Chilocorus; not sure abt Brachiacantha
The only Chilocorus in North Am. with any white on the head/pronotum is the introduced C. nigritus, and it doesn't have red spots.

I'm not sure about Brachiacantha for this, though...if those red spots extend to the lateral margin (which it looks like they just might do), it could be something in the dentipes group, but discrete red spots on a little blue-eyed black scymnine indicate Hyperaspis. I can't find anything with such large red spots in Arizona (I was hoping for H. rivularis or H. signata bicentralis but they don't get west of Texas) but I'll crack Gordon again when I get home!

wonderful; quite a few more on the family page are crying for attention

workin' on 'em ;)

much appreciated, Ma'am. missed you around here a lot.

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