Diptera.info :: Identification queries :: Diptera (adults)
 Fly from Hong Kong: Tachinidae?
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| chickenold |
Posted on 05-10-2008 06:18
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 Member Location: Posts: 338 Joined: 21.02.07 |
About 15mm. Found on leaves next to a trail in lowland plain rural area, near a stream. |
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| Zeegers |
Posted on 05-10-2008 10:29
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Member Location: Soest, NL Posts: 19299 Joined: 21.07.04 |
Difficult to see, what makes you think Tachinidae ? If so, very aberrant. Looks more like an acalyptratae (? near Uliidae ?) Theo |
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| Nikita Vikhrev |
Posted on 05-10-2008 11:30
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 Member Location: Moscow, Russia Posts: 9553 Joined: 24.05.05 |
It is Platystomatidae. My guess - Elassogaster, anyway the one for Valery. Nikita Nikita Vikhrev - Zool Museum of Moscow University |
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| chickenold |
Posted on 05-10-2008 13:11
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Member Location: Posts: 338 Joined: 21.02.07 |
Thanks all! Still waiting for the book on Chinese flies from bookstore. Will sit down and have a thorough digest on their classification... |
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| Andrew Whittington |
Posted on 10-04-2009 17:32
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 Member Location: Snowdonia Posts: 111 Joined: 30.01.07 |
Certainly, Nikita is right, this is Platystomatidae, but I'm not convinced Elassogaster is correct. I agree that it is in the group of genera associated with Elassogaster sometimes referred to as Stenopterinini. There is no postpronotal seta and r4+5 cell appears to be apically constricted placing this specimen in the Plagiostenopterina - Elassogaster group of genera. Elassogaster is separated from other members of that group by the presence of small hair-bearing tubercules ventrally on the fore leg. I see no evidence of these tubercles, although a lateral view would be necessary to be sure. Secondly, the angle of r-m would be significant, but that is obscured by the position of the legs. Therefore, looking at other related genera, we move onto the Plagiostenopterina and associated genera. To be certain, a facial view is needed, because Plagiostenopterina s.str. is separated from the other genera formerly placed as subgenera (sensu Malloch, 1931: Carolimyia, Meringomeria & Peronotrochus) by the presence of facial hair. As far as I know, Carolimyia& Peronotrochus are only distributed in the Philippines, so they can probably (but not necessarily) be excluded. The presence of the post-ocular seta is clear and suggests to me that this specimen belongs to Plagiostenopterina s.str., but I have to confess, I do not know for sure that the bristle is absent in Meringomeria (or the other genera). Beyond genus, it becomes a bit of a guessing game without actually examining the specimen under the microscope, but the shiny frons, wing markings and colour of the notal iridescence points toward Plagiostenopterina dubiosaMalloch, 1931. This species is widely distributed in the Oriental region, so is a possibility, but I would by no means treat this identification as certain. Edited by Andrew Whittington on 10-04-2009 17:32 -----o0o----- Andrew E. Whittington https://flyevidence.co.uk/ |
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