Diptera.info :: Identification queries :: Diptera (adults)
 Family? Chironomidae?
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| Nikita Vikhrev |
Posted on 31-08-2014 18:27
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 Member Location: Moscow, Russia Posts: 9491 Joined: 24.05.05 |
RUS, Magadan reg., 3-4 mm, streams
Nikita Vikhrev attached the following image:  [121.13Kb] Edited by Nikita Vikhrev on 31-08-2014 20:34 Nikita Vikhrev - Zool Museum of Moscow University |
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| Stephane Lebrun |
Posted on 31-08-2014 18:38
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 Member Location: Le Havre, France Posts: 8248 Joined: 03.03.07 |
Blephariceridae ?
Stephane. |
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| Nikita Vikhrev |
Posted on 31-08-2014 19:21
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Member Location: Moscow, Russia Posts: 9491 Joined: 24.05.05 |
We (Dmitry Gavriushin and me) thought so. But seems it is not Blephariceridae. New idea: Thaumaleidae comprise a homogeneous family of small (wing length 1.5-7.5 mm) (Fig. 1) stoutly built flies with shiny yellow to black bodies. Their eyes are holoptic in both sexes, their antennae short and slender. The wings have a characteristic venation and tend to fold downwards across a transverse line of weakness near the apex of the subcosta. The adults are diurnal and usually frequent wet rocks or vegetation near streams in wet forest. The larvae are aquatic and amphipneustic. The family (about 100 described species) is possibly mainly holarctic in distribution with less than a dozen species having been described previously from the southern hemisphere. Nikita Vikhrev - Zool Museum of Moscow University |
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| Tony Irwin |
Posted on 31-08-2014 19:35
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 Member Location: Norwich, England Posts: 7316 Joined: 19.11.04 |
I feel sure this is a chironomid - most likely Diamesinae. Several species of Diamesa have reduced antennae and enlarged genitalia in the males, and the habitat is right. No doubt John Carr will be able to contribute as well, but I think it's safe to re-title this thread Chironomidae
Tony ---------- Tony Irwin |
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| Nikita Vikhrev |
Posted on 31-08-2014 20:34
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Member Location: Moscow, Russia Posts: 9491 Joined: 24.05.05 |
Tony, thank you!!!
Nikita Vikhrev - Zool Museum of Moscow University |
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| John Carr |
Posted on 31-08-2014 20:49
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 Super Administrator Location: Massachusetts, USA Posts: 10527 Joined: 22.10.10 |
The wing is typical Diamesinae, with right angled anal lobe, long, curved r-m crossvein, and short m-cu crossvein intersecting after the fork in Cu. (Maybe it's a crossvein between M1+2 and M3+4 in modern terminology.) Several species of Diamesa fly in winter in temperate and boreal North America. John Carr attached the following image:  [115.47Kb] |
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| John Carr |
Posted on 31-08-2014 20:52
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Super Administrator Location: Massachusetts, USA Posts: 10527 Joined: 22.10.10 |
Large legs and genitalia and reduced male antennae are associated with mating on the ground. Cordiform fourth tarsomeres are said to be associated with walking or running. |
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| Nikita Vikhrev |
Posted on 31-08-2014 22:01
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Member Location: Moscow, Russia Posts: 9491 Joined: 24.05.05 |
Thank you, John!
Nikita Vikhrev - Zool Museum of Moscow University |
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