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Diptera.info :: Identification queries :: Diptera (adults)
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Chironomidae v Ceratopogonidae
Susan R Walter
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Posted on 17-11-2022 16:54
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Location: Touraine du Sud, central France
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I recently received this query from a young French entomologist, translated by me, and since nematocera aren't really my thing I wondered if someone on the forum could help: 'In the case of nematocerans, with neither anal veins joining the wing margin, nor disc cells, nor ocelli, and with a reduced number of veins (no more than 8), the key often leads me to choose between Chironomidae and Ceratopogonidae, without either choice being fully convincing. Also, I regularly find myself at this stage, with very different individuals, not necessarily showing the distinctive antennae for these two families...'
Susan
 
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John Carr
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Posted on 17-11-2022 19:45
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If the postnotum has a longitudinal groove, it is Chironomidae. This is rarely absent and you are unlikely to collect the exceptions in central France. On marine shores you may find them.

If vein M is forked or there is a crossvein between the branches of the radial vein, it is Ceratopogonidae. The veins can be hard to make out in photographs.

If the front basitarsus is longer than the front tibia it is Chironominae. There is a slight amount of overlap in "leg ratio" with Orthocladiinae.

If the last 4-5 antennal segments are elongated, it is Ceratopogonidae. If only the last 1 or 2 are, Chironomidae. If the antenna is reduced to 9 or fewer flagellomeres, Chironomidae.

If the claws are long, a femur greatly swollen, or there are spines under the fifth tarsomeres, one of the predatory Ceratopogoninae. Likewise if it has apparently functional mandibles (in Europe).

Usually if the hind legs are long you have Ceratopogonidae, but see also Tanypus in the Chironomidae.
 
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Susan R Walter
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Posted on 18-11-2022 11:17
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Location: Touraine du Sud, central France
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Thanks John, that looks super helpful. I will pass it on to Anastasia.
Susan
 
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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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