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Diptera.info :: Identification queries :: Diptera (adults)
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Calliphoridae: ♀ Onesia cf. floralis
eklans
#1 Print Post
Posted on 14-10-2021 13:57
Member

Location: Franconia, Germany
Posts: 1774
Joined: 11.11.18

Hi, I've found this fly on my housewall (Ansbach, DE-Franconia, close to Frankenhoehe Nature Park, old deciduous forest) on 2021-10-12.
I think it is Onesia floralis (sepulcralis): R5 open and 0, 3 ia.
Thank you for your comments!
eklans attached the following image:


[46.48Kb]
Edited by eklans on 18-10-2021 09:58
Greetings, Eric
 
Zeegers
#2 Print Post
Posted on 15-10-2021 12:38
Member

Location: Soest, NL
Posts: 16625
Joined: 21.07.04

Yes, looks like Onesia. I would not dare to separate the two species.

Theo
 
eklans
#3 Print Post
Posted on 15-10-2021 12:55
Member

Location: Franconia, Germany
Posts: 1774
Joined: 11.11.18

Thank you very much Theo!
But are floralis & sepulcralis different species?
fauna-eu call Musca s. as a synonym of O. floralis.
H. Schumann's "Revision der Gattung Onesia..." names 6 species:
O. sepulcralis, austriaca, canescens... and floralis as a synonym of sepulcralis. I could not find a source with sepulcralis and floralis as separate species. Frown
Greetings, Eric
 
Zeegers
#4 Print Post
Posted on 15-10-2021 15:37
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Location: Soest, NL
Posts: 16625
Joined: 21.07.04

I meant floralis and austriaca.
Apparently, you also might have kowarzi and zumpti, I wasn’t aware of that. So even more, I wouldn’t dare to make the call.

Theo
 
eklans
#5 Print Post
Posted on 15-10-2021 16:32
Member

Location: Franconia, Germany
Posts: 1774
Joined: 11.11.18

Sorry for being tenacious, but Schumann also added a key and the female of his sepulcralis is the only on to have no pre ia. Also the wings of the other ones look quite different (if in some cases a small ia is present).
Greetings, Eric
 
Zeegers
#6 Print Post
Posted on 16-10-2021 09:46
Member

Location: Soest, NL
Posts: 16625
Joined: 21.07.04

I don’t have Schumann, if you could share a PDF, please send a pm.
The species called sepulcralis by Schumann is called floralis by most modern authors. I don’t know why, check Rognes, but it is a technical matter.
As for the other species, I have no experience with them, somI hold my ground “ I would not dare to make the call”. But separating females based on the presence or absence of a tiny prae IA seems an unwise thing to do to me, unless you really know what you are doing. As said, I don’t Smile
 
eklans
#7 Print Post
Posted on 16-10-2021 10:24
Member

Location: Franconia, Germany
Posts: 1774
Joined: 11.11.18

Hi Theo, pm sent.
Of course you are right, that the prae IA alone is not enough to determine (and Schumann writes, that in rare cases austriace et al could be without it, too) - but in combination with the wing venation it seems to be practical. The wings are shown in Schumann's key, too.
Greetings, Eric
 
Zeegers
#8 Print Post
Posted on 18-10-2021 08:19
Member

Location: Soest, NL
Posts: 16625
Joined: 21.07.04

So, I checked all my Onesia from one locality in Austria:

* based on male genitalia: all are floralis / sepulchralis
* vertex can be narrow or broader
* prae IA can be absent, hairlike or present.

In other words: Schumann's external features are unreliable already in these 10 specimens. Now I know what I am doing, I would not rely on them.

Theo
 
eklans
#9 Print Post
Posted on 18-10-2021 10:03
Member

Location: Franconia, Germany
Posts: 1774
Joined: 11.11.18

Hi Theo, thank you very much for your efforts!
What do you think of Schumann's feature wing venation? Is this variable, too?
eklans attached the following image:


[49.93Kb]
Edited by eklans on 18-10-2021 10:25
Greetings, Eric
 
Zeegers
#10 Print Post
Posted on 18-10-2021 19:46
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Location: Soest, NL
Posts: 16625
Joined: 21.07.04

I don’t think you can separate austriaca from floralis in this way. The other species are extremely rare, I don’t know


Theo
 
Zeegers
#11 Print Post
Posted on 18-10-2021 19:49
Member

Location: Soest, NL
Posts: 16625
Joined: 21.07.04

Of course, Schumann isn’t making things up, the tendencies are there. But 80 % reliability is not reliable at an individual level.

I am sorry, I wished it worked better, since extrracting male genitalia is extremely difficult in Onesia.

Theo
 
eklans
#12 Print Post
Posted on 18-10-2021 20:48
Member

Location: Franconia, Germany
Posts: 1774
Joined: 11.11.18

No problem, Theo, and thanks again for your explanations. I'll leave it as cf. floralis and hope to find more Onesia (and Bellardias).
Greetings, Eric
 
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23.09.21 15:29
All sorted.

16.09.21 22:24
Sorry put 5 new threads in Asilidae forum instead in Syrphidae forum, can pleas an admin move it to Syrph? THANKS, Norbert

09.09.21 07:48
https://www.jeugdb
ondsuitgeverij.nl/
product/de-vliegen
families-met-drie-
voetkussentjes/

09.09.21 07:47
wing ventation is totally different

03.09.21 12:51
Hi, what's the major difference between dolichopodidae and rhagionidae? Can someone help me? Thanks!

28.06.21 15:24
thx TO eklans

03.06.21 11:11
@Tony Irwin Thank you Tony! I've emailed you there Pfft

02.06.21 22:26
Rob - can you PM me with an e-mail address, and I'll send it over.

02.06.21 13:16
Hello chaps! Does anyone have a copy of: Revision of the willow catkin flies, genus Egle Robineau-Desvoidy (Diptera: Anthomyiidae), in Europe and neighbouring areas ?? I'd be ever so grateful! Rob

31.05.21 14:31
The part that got deleted is "longer, dark median stripe on thorax"

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