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Diptera.info :: Identification queries :: Diptera (adults)
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Nematocera
Dima DD
#1 Print Post
Posted on 01-12-2008 01:19
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Location: St.Petersburg, Russia
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Dear friends,
this good photo of predaceous gnat (male?) with double large claws is not mine (author: Vladimir Anikeev). What gnat is it? Could it be Mycetobiidae?
http://macroclub.ru/gallery/showphoto.php/photo/9581
macroclub.ru/gallery/data/512/thumbs/DSC9856-_.jpg

Russia, Zaraysk (Moscow region), 2008:07:17
 
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Paul Beuk
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Posted on 01-12-2008 08:35
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Almost looks like mating between Ceratopogonidae. Top one reminds me of images I have seen of Sphaeromias.
Paul

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Dima DD
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Posted on 01-12-2008 13:11
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Thank you, Paul!
The upper gnat really looks like Sphaeromias female. However, I have some doubts about the lower one (despite the position of their abdomens)... Do males of Sphaeromias lack that magnificent plumose antennas that I can see on very few images of other Ceratopogonidae males? Is Sphaeromias a biting (blood-sucking) gnat or predaceous?
Edited by Dima DD on 01-12-2008 13:12
 
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John Carr
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Posted on 29-07-2011 02:39
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Males of many Ceratopogonidae and most Chironomidae use plumose antennae to listen for females. The male searches for females, who signal availability by flying near a mating swarm.

Males of typical Sphaeromiini do not search for females and have no need for plumose antennae. Females are aerial predators, typically hunting Chironomidae and small Ephemeroptera. The male signals availability by flying near a hunting swarm. If a female happens to catch a male of her own species she will mate as she eats him.

With no need for sensitive antennae, the male antenna plume is often reduced or absent. The male is normally much smaller than the female in groups where the male is eaten.

Reference:

J.A. Downes 1978. Feeding and mating in the insectivorous Ceratopogoninae (Diptera). Memoirs of the Entomological Society of Canada 104.
 
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Paul Beuk
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Posted on 24-06-2019 12:49
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Sphaeromias pictus devouring another ceratopogonid. I first though a simuliid, but the antennae do not fit. But as you can see the wing venation of the prey near the bottom, I am quite confident.
Edited by Paul Beuk on 24-06-2019 12:51
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23.06.25 18:10
If you have some spare money, there is a copy (together with keys to pupae and larvae) for sale by Hermann L. Strack, Loguivy Plougras, France

23.06.25 11:18
Appreciate it, Tony Irwin! I got the hint to use the key next to Langton and Pinder key for females of Chironomidae. So no specific queries, except the keys... I will keep this on my list and hope th

19.06.25 15:33
I have the hard copy book, if you have any specific queries, but I'm not scanning the 500+ pages!

02.06.25 18:26
Anyone has "Chironomidae of the Holarctic region. Keys and diagnoses. Part 3. Adult Males Entomologica Scandinavica Supplement 34"? smolwaarneming@gma
il.com

28.05.25 20:57
I have Russian Coenosia. nikita6510@ya.ru

28.05.25 12:25
Is someone able to share with me "A key to the Russian species of the genus Coenosia"?

08.05.25 18:22
I have

03.05.25 08:35
Does someone has a scan of Nartshuk E.P. 2003. Key to families of Diptera (Insecta) of the fauna of Russian and adjacent countries. Proceedings of the Zoological Institute Vol. 294: 1-252 for me?

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