Diptera.info :: Identification queries :: Diptera (adults)
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 Female Cricotopus bicinctus -> ok
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| CedricMondy |
Posted on 30-06-2021 17:47
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 Member Location: Île-de-France (France) Posts: 101 Joined: 30.06.21 |
Hi everyone, First post here. This is a female chironomid I found in my city, close to Paris in France. Using the handbook for the identification of British Chironomidae, I found Cricotopus bicinctus. This was also posted on insecte.org and Eugène Vandebeulque thought it was a good idea but that deserves confirmation here, so here am I. Thank you for your help! Cédric  Cédric Mondy : France : Saint-Maur-des-Fossés : 94100 : 02/05/2021 Altitude : 40 m - Taille : 2.8 mm Réf. : 285013 Edited by CedricMondy on 11-03-2022 14:18 |
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| John Carr |
Posted on 30-06-2021 18:09
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 Member Location: Massachusetts, USA Posts: 10222 Joined: 22.10.10 |
It could be Cricotopus bicinctus. There is a similar species C. vierriensis which is known from France but not the UK. Hirvenoja (1973) noted a size difference: Flügellänge der untersuchten Populationen 2.0 (1.5 - 2.5) mm. [...] bicinctus Flügellänge 1.8 (1.5 - 1.9) mm [...] vierriensis The omitted parts relate to bristles on the legs which are not visible here. |
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| CedricMondy |
Posted on 30-06-2021 18:42
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Member Location: Île-de-France (France) Posts: 101 Joined: 30.06.21 |
Thank you John! So, for this one with a wing length of about 2.5mm it would be too long for vierriensis and therefore confirm bicinctus, am I right? |
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| John Carr |
Posted on 30-06-2021 18:50
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Member Location: Massachusetts, USA Posts: 10222 Joined: 22.10.10 |
CedricMondy wrote: Thank you John! So, for this one with a wing length of about 2.5mm it would be too long for vierriensis and therefore confirm bicinctus, am I right? If Hirvenoja's size range is correct and there are no two-banded species in other species groups. I only looked at the key to the bicinctus group. |
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| CedricMondy |
Posted on 30-06-2021 18:52
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Member Location: Île-de-France (France) Posts: 101 Joined: 30.06.21 |
Yes, I understand! Thank you for your help and the information!
Cédric |
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