Diptera.info :: Identification queries :: Diptera (adults)
 Calliphoridae: ♀ Onesia cf. floralis
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| eklans |
Posted on 14-10-2021 12:57
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Member Location: Franconia, Germany Posts: 4185 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 08:58 Greetings, Eric K |
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| Zeegers |
Posted on 15-10-2021 11:38
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Member Location: Soest, NL Posts: 19146 Joined: 21.07.04 |
Yes, looks like Onesia. I would not dare to separate the two species. Theo |
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| eklans |
Posted on 15-10-2021 11:55
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Member Location: Franconia, Germany Posts: 4185 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. 
Greetings, Eric K |
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| Zeegers |
Posted on 15-10-2021 14:37
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Member Location: Soest, NL Posts: 19146 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 |
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| eklans |
Posted on 15-10-2021 15:32
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Member Location: Franconia, Germany Posts: 4185 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 K |
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| Zeegers |
Posted on 16-10-2021 08:46
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Member Location: Soest, NL Posts: 19146 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  |
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| eklans |
Posted on 16-10-2021 09:24
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Member Location: Franconia, Germany Posts: 4185 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 K |
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| Zeegers |
Posted on 18-10-2021 07:19
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Member Location: Soest, NL Posts: 19146 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 |
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| eklans |
Posted on 18-10-2021 09:03
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Member Location: Franconia, Germany Posts: 4185 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 09:25 Greetings, Eric K |
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| Zeegers |
Posted on 18-10-2021 18:46
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Member Location: Soest, NL Posts: 19146 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 |
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| Zeegers |
Posted on 18-10-2021 18:49
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Member Location: Soest, NL Posts: 19146 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 |
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| eklans |
Posted on 18-10-2021 19:48
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Member Location: Franconia, Germany Posts: 4185 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 K |
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