Diptera.info - Discussion Forum: Coenosia ID -> C. agromyzina & C. rufipalpis

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Coenosia ID -> C. agromyzina & C. rufipalpis
Carnifex	#1 Posted on 09-05-2019 11:04
Member Location: Vienna, Austria Posts: 1885 Joined: 23.06.15	Hi, here are two of what I think are both Coenosia from a garden in Vienna. The first one I would ID as C. agromyzina. Is that ok? Here is the second one. Can this one be IDed? Sorry for posting two ID request in one thread. I can split it if recommended Edited by Carnifex on 25-06-2019 22:42 Cheers, Lorin Font Color All requests are from the urban area of Vienna, if not otherwise stated. My Diptera observations (and other living forms) can be found here, and corrections or comments over there would also be appreciated.


Nikita Vikhrev	#2 Posted on 09-05-2019 13:29
Member Location: Moscow, Russia Posts: 9236 Joined: 24.05.05	I agree with agromyzina. 2nd male is C. testacea or related species Nikita Vikhrev - Zool Museum of Moscow University


Carnifex	#3 Posted on 09-05-2019 17:17
Member Location: Vienna, Austria Posts: 1885 Joined: 23.06.15	Nikita, may I ask how you got to testacea-group with just these two mediocre photos? General slender appearance and yellow legs? Because some of the features mentioned in the key are just not visible here. I followed the key and reached in fact C. testacea: incomplete posteroventrals on hind femur (correct?) palpi yellow (barely visible, but seen well under microscope) and gena broader than 3rd ant. segment: --> C. testacea. Happy to receive confirmation or correction . Edited by Carnifex on 09-05-2019 23:09 Cheers, Lorin Font Color All requests are from the urban area of Vienna, if not otherwise stated. My Diptera observations (and other living forms) can be found here, and corrections or comments over there would also be appreciated.


Nikita Vikhrev	#4 Posted on 10-05-2019 10:29
Member Location: Moscow, Russia Posts: 9236 Joined: 24.05.05	Gregor's at al. wording "incomplete/complete row of posteroventrals on hind femur" is very bad. There are very few pv on f3, not a row. Use this one: Hind femur with one or more well developed posteroventral setae on apical half... rufipalpis Meigen - Hind femur with distinct posteroventrals on basal half only... testacea (Robineau-Desvoidy) Nikita Vikhrev - Zool Museum of Moscow University


Carnifex	#5 Posted on 10-05-2019 22:46
Member Location: Vienna, Austria Posts: 1885 Joined: 23.06.15	Ok, I tried the new approach: There are ventral bristles in the apical half of the hind femur, if I see that correctly. Does this make it C. rufipalpis? Cheers, Lorin Font Color All requests are from the urban area of Vienna, if not otherwise stated. My Diptera observations (and other living forms) can be found here, and corrections or comments over there would also be appreciated.


Nikita Vikhrev	#6 Posted on 10-05-2019 22:58
Member Location: Moscow, Russia Posts: 9236 Joined: 24.05.05	Lorin, I think that in early may rifipalpis is the main possibility, it is spring species indeed. I think you are right. Nikita Vikhrev - Zool Museum of Moscow University


Carnifex	#7 Posted on 10-05-2019 23:08
Member Location: Vienna, Austria Posts: 1885 Joined: 23.06.15	Thanks again! Cheers, Lorin Font Color All requests are from the urban area of Vienna, if not otherwise stated. My Diptera observations (and other living forms) can be found here, and corrections or comments over there would also be appreciated.