Thread subject: Diptera.info :: Chloropidae USA 2011-V-19 (= Incertella)
Posted by John Carr on 23-11-2011 18:58
#1
Found in a flower. Massachusetts, USA May 19, 2011.
2.5 mm long. Oscinellinae, I think.
(Click for large size or view
on Flickr.)
(Click for large size or view
on Flickr.)
Edited by John Carr on 21-05-2012 21:46
Posted by Sara21392 on 27-11-2011 15:46
#2
Yes, is Oscinelliene, but would you please take a photo from profile of head clearly? or please tell me is vibrissal angle of gena developed anteriorly or no? :)
Posted by John Carr on 27-11-2011 17:50
#3
It has dried in storage. I thought I had it in alcohol but the container was empty.
Posted by Sara21392 on 27-11-2011 23:35
#4
Unfortunately it's difficult to me. so sorry, I'd like to help you! :S
Looks like
Aphanotrigonum to me, but by key i arrive to
Pseudeurina!!!!! :| :|
I hope some friends can help to us! :o
Posted by John Carr on 28-11-2011 00:37
#5
I don't think we have
Pseudeurina in America. The ocellar triangle should be gray pruinose to reach
Aphanotrigonum in the key in Manual of Nearctic Diptera:
15. Ocellar triangle only, or both triangle and scutum highly shining, entirely or predominantly without pruinescence; if triangle entirely pruinose (rarely), then hind tibia with a short anteroventral spur, or frons with two pairs of fronto-orbital bristles developed; ocellar triangle usually smooth and shiny but this shine sometimes interrupted by piliferous punctures or fine striations or shagreening ... 16
15. Ocellar triangle, scutum, and scutellum dull, densely gray pruinose, sometimes subshining if only thinly pruinose; three small polished spots rarely present on ocellar triangle adjacent to ocelli ... 36
From couplet 36 one selects "scutum without deeply incised lines of punctures" to reach 37, R2+3 not exceptionally long as in
Dicraeus to reach couplet 38, and "ocellar triangle with two rows of coarse piliferous punctures" to reach
Aphanotrigonum.
The two species were reviewed by Sabrosky (1936) but I do not have his paper; I would have to request it through my library.
Posted by John Carr on 21-05-2012 21:46
#6
Terry Wheeler has identified it as a member of a species group of
Incertella that needs revision.
Posted by Sara21392 on 23-05-2012 21:18
#7
Hi John
Did Terry tell you about characters of this genus that needs for ID? I have a species like this that confirmed as Aphanotrigonum! Thank you very much
Edited by Sara21392 on 23-05-2012 21:28
Posted by John Carr on 24-05-2012 00:05
#8
He didn't mention generic characters. He said the species in my area are usually identifiable by color. His chapter in Manual of Central American Diptera includes
Incertella in the key., but does not include
Aphanotrigonum.
Posted by Sara21392 on 24-05-2012 18:04
#9
Thank you!
