Enneboeus marmoratus - please help look for this little beetle species in California

Last summer, I photographed an unfamiliar, small, dark beetle at our balcony lights in San Francisco. An expert (Matt Gimmel) eventually identified it as Enneboeus marmoratus, a new species for the US, and published a paper on the find:




I again found quite a few of these beetles at a black light placed on our balcony recently (a year later), so this appears to be a persistent and even abundant introduced species here in Noe Valley. The question is how widespread is this beetle in in the Bay Area or beyond? If you look for insects at lights or put out a black light for moths, etc. - please consider looking for and photographing small (3-4 mm) dark beetles with somewhat vague dark red patches of hairs on the back of the elytra, somewhat resembling a dark lady beetle to my eyes (see links above). Thanks!

@kueda @loarie @gyrrlfalcon @tiwane @finatic @damontighe @silversea_starsong @catchang @moonlittrails @owicki @rjadams55

Posted on 27 September, 2018 17:36 by kschnei kschnei


Very cool @kschnei! I'll be on the lookout.

Posted by tiwane about 5 years ago

so cool @kschnei !

Posted by alexs_test19 about 5 years ago

@kschnei - would collections be useful if we encounter it? Ethanol storage or another preferred method?

Posted by damontighe about 5 years ago

Thank you for posting this. I will certainly keep my eyes open.

Posted by rjadams55 about 5 years ago

@damontighe : yes, collecting them would be ideal (ethanol is fine). FWIW, I've mostly encountered them on warm, late summer and fall nights (not a common situation in San Francisco, but we get them occasionally)... I assume that folks are more likely to be out there looking and photographing on warm evenings anyway....

Posted by kschnei about 5 years ago

Thanks - I am happy to photograph anything that I can see!

Posted by gyrrlfalcon about 5 years ago

Really cool. It's not even from a Family that I've seen. But I'll be looking for it down south here.

Posted by finatic about 5 years ago

will keep an eye out

Posted by loarie about 5 years ago

@kschnei, curious that you are only acknowledged in the publication ... and not a co-author given that you found this critter and got it into the right hands. Just raising a question about the role of ‘citizen scientists’ in the discovery process. I don’t have the answers. A new sp. observation in the US seems like leaps and bounds above the typical observation of a species in a new location, etc. And, of course, I’ll keep an eye out. Cheers.

Posted by metsa about 5 years ago

@metsa : Matt generously offered to make me an author on this paper, but I declined and asked to be in the acknowledgements instead. I think it might be a "gray area", but I felt that finding a beetle I couldn't identify and getting help from an expert didn't qualify for authorship in my mind. I've authored or been a co-author on scientific papers in the past and I feel like I would need to make more of a substantive contribution to the body of the paper...

Posted by kschnei about 5 years ago

Looks like @catchang found this species in Oakland!

So perhaps it has spread throughout the Bay Area? Will be very curious if folks find it elsewhere in California.

Posted by kschnei about 5 years ago

@damontighe Do you have ethanol and collection tubes? I’ll try tonight as well.

Posted by catchang about 5 years ago

@catchang I've got tubes and 98% Ethanol

Posted by damontighe about 5 years ago

Another great example of the power of the iNat community! :)

Posted by kschnei about 5 years ago

Collection completed.

Posted by catchang about 5 years ago

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