Rove Beetle - Quedius curtipennis

Moved

Moved from Quedius.

Likely Q. curtipennis/fuliginosus - the first known from Pacific Northwest as early as 1939 [Majka & Smetana 2007.
Safe discrimination of the species by genitalia only, right.

… Boris Büche, 19 March, 2021 - 12:46pm

Hmm

This is indeed Quedius (subgenus Quedius). Because the scutellum looks impunctate, this is Quedius fuliginosus. A similar species has completely pale antennae with less bulgy eyes, while yours has its first antennomere dark on top and very bulgy eyes. This species was a newly recorded introduction for NA recently from maritime Canada. If your scutellum is indeed impunctate it represents a new record for the US. If you are interested, I could dissect the specimen at the Guelph Insect Collection (Canada) and report back.

Adam

… Adam Brunke, 9 February, 2009 - 9:55pm

impunctate scutella and dark antennomeres

Looking at the closeups of the antennae, it looks like at least the first two or three antennomeres have dark spots on top. Does that change anything?

I tried to include a couple of the shots from different angles that show the scutellum better, but they weren't the best lighting or focus. :(

… Kevin Hall, 9 February, 2009 - 11:23pm

I wish you could...

but I didn't keep the specimen. I will keep my eyes open for additional specimens. If I find one, I'll be happy to send it along.

I took quite a few pictures, and these are definitely shrunk down. I will try to post a better closeup of the scutellum. If any additional pictures would help, please let me know.

… Kevin Hall, 9 February, 2009 - 10:28pm

Hi Kevin, According to a

Hi Kevin,

According to a recent paper, the second and third antennomeres are completely dark in fuliginosus and pale in the other similar species. Yours seems to be in-between. It must be either of these two species as your scutellum is definitely impunctate (others have many punctures). A perfect dorsal shot of the head would help a bit to see the eyes better. I think the only way to resolve this one is a specimen to dissect.

Adam

… Adam Brunke, 10 February, 2009 - 10:49am

looks like Quedius to me

pls don't forget to measure your catch -- may save a lot of effort to those who provide IDs

… v belov, 7 February, 2009 - 7:13pm