Diptera.info :: Identification queries :: Diptera (adults)
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 Phorocera obscura characteristics
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| jck |
Posted on 10-04-2019 12:31
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Member Location: Posts: 1074 Joined: 21.08.12 |
Can someone help me a bit with this species? I'm sure I've got a number in my archive but I don't know exactly what to look for. After reading pages of posts on this forum I haven't got further than hairy eyes, 3 dcs, elongated abdomen and a spring species. Are there other things to look for? James |
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| John Carr |
Posted on 10-04-2019 13:45
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 Member Location: Massachusetts, USA Posts: 9838 Joined: 22.10.10 |
In tribe Exoristini the bend in vein M is a right angle with the distal section curving towards wingtip. A similar curve in M is also common in tribe Polideini (along with hairy eyes). Typically the distal part of M in Polideini approximates a quarter circle while it is more elongate in Exoristini. Look for the strongly differentiated upper orbital bristles typical of Exoristini. |
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| Zeegers |
Posted on 10-04-2019 17:10
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Member Location: Soest, NL Posts: 18518 Joined: 21.07.04 |
And most of all, it is much more elongated than the vast majority of Exoristinae. First impression is more of a Sarcophagini.... Theo |
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| jck |
Posted on 10-04-2019 20:32
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Member Location: Posts: 1074 Joined: 21.08.12 |
Thank you both - just to be sure, I have chosen a couple of photos to illustrate your remarks. Are these the setae John means (indicated by the red lines)? James jck attached the following image:  [135.2Kb] |
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| jck |
Posted on 10-04-2019 20:34
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Member Location: Posts: 1074 Joined: 21.08.12 |
And is this the bend in M? I don't see much of a right angle there. James jck attached the following image:  [151.77Kb] |
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| John Carr |
Posted on 10-04-2019 20:43
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Member Location: Massachusetts, USA Posts: 9838 Joined: 22.10.10 |
The arrows are correctly placed. There are normally two pairs of reclinate upper orbitals. Also the second picture shows the large male genitalia of Phorocera. |
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| Zeegers |
Posted on 10-04-2019 21:53
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Member Location: Soest, NL Posts: 18518 Joined: 21.07.04 |
The extremely large male genitalia are indeed unique. (if you include Parasetigena in Phorocera). Also, the female genitalia are highly peculiar. Theo |
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| John Carr |
Posted on 11-04-2019 00:50
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Member Location: Massachusetts, USA Posts: 9838 Joined: 22.10.10 |
Zeegers wrote: The extremely large male genitalia are indeed unique. (if you include Parasetigena in Phorocera). Theo Genitalia are also large in the New World genus Tachinomyia, which is next to Phorocera in the recently published molecular phylogeny. |
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| jck |
Posted on 11-04-2019 06:09
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Member Location: Posts: 1074 Joined: 21.08.12 |
Many thanks. This definitely helps. The woods here are full of Tachinids at the moment and I have 26 individuals to (try to) identify in my archive. James |
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but don't see the image in the post.
