Diptera, unidentified - Cheilosia grossa

Moved

Moved from Cheilosiina.

… Martin Hauser, 13 January, 2015 - 11:13am

Moved

Moved from Syrphid Flies.

… Martin Hauser, 29 March, 2014 - 3:40pm

This feels like something in

This feels like something in the Milesiini to me - maybe Criorhina or Hadromyia?

… Kelsey J.R.P. Byers, 17 March, 2014 - 4:40pm

This is an odd little sucker.

This is an odd little sucker. It is neither of those genera. Let me do some research.

… Kevin Moran, 13 January, 2015 - 1:02am

What about Pyritis? Very rare

What about Pyritis? Very rare genus... big and looks like Cheilosia... I can not see the face enough in these pics, so I am not completely sure

… Martin Hauser, 13 January, 2015 - 10:46am

Cheilosia

This is Cheilosia. It is one of three species based on the NMNH collection. However there could be other similar species in this range which I don't know about.

Cheilosia lasiophthalmus
Cheilosia chalybescens
Cheilosia ferruginia

… Kevin Moran, 13 January, 2015 - 11:21am

Maybe. It doesn't have the cl

Maybe. It doesn't have the clouded portions of the wing we see in Pyritis or the plumose arista.

… Kevin Moran, 13 January, 2015 - 11:06am

You are right, it is not Pyri

You are right, it is not Pyritis, it is actually the introduced Cheilosia grossa (Which is called C. corydon by FCT, but this is not the valid name)... It is an early spring species introduced to NW states! Perfect fit...

… Martin Hauser, 13 January, 2015 - 11:13am

What about these species?

What about the species. All look roughly like this.

Cheilosia lasiophthalmus - Great match.
Cheilosia chalybescens - Eliminated. Has a black setose t4 & 5.
Cheilosia ferruginia - Great match.

… Kevin Moran, 13 January, 2015 - 11:22am

I am very confident that this

I am very confident that this is the European species, but I have to admit that I have never seen ferruginea and on top of it, Cheilosia is a mess and I do not know anybody who has even a little bit of insight into the Nearctic fauna. There are several good specialists who work on the Palaearctic fauna.... So this is just a "guess". Many of the Cheilosia pics on BG look very distinct, but unfortunately they can not be identified so far...

… Martin Hauser, 13 January, 2015 - 11:32am

Looks like pictures of C. grossa.

I cannot tell them apart from pictures of C. grossa. Yes. Cheilosia is an utter mess. Most likely a good chunk of described species are synonyms but there are likely plenty of undescribed species too.

When they revised the European species they synonymized some ridiculous number like 50 species. There had gotten to be so many species that it wasn't possible to check all the types so authors were redescribing species by country almost. You would have one in France and one in Poland for instance.

… Kevin Moran, 13 January, 2015 - 11:35am

I think you are very correct

I think you are very correct with your assessment of the genus Cheilosia

… Martin Hauser, 13 January, 2015 - 12:36pm

Moved for expert attention.

Moved from ID Request.

… Ken Wolgemuth, 17 March, 2014 - 4:36pm

pls correct location data

reads "...Lane County / OR County, Oregon..."
please refer to the filling instructions provided in the submission form

… v belov, 17 March, 2014 - 4:01pm

Error

Fixed, thank you!

… Bruce N, 17 March, 2014 - 4:04pm