Thread subject: Diptera.info :: Female Cricotopus bicinctus -> ok
Posted by CedricMondy on 30-06-2021 17:47
#1
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
Posted by John Carr on 30-06-2021 18:09
#2
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.
Posted by CedricMondy on 30-06-2021 18:42
#3
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?
Posted by John Carr on 30-06-2021 18:50
#4
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.
Posted by CedricMondy on 30-06-2021 18:52
#5
Yes, I understand! Thank you for your help and the information!