Thread subject: Diptera.info :: Mycetophilidae : Pseudexechia ?
Posted by Bruno48 on 15-04-2021 20:09
#1
I found it in a cave entrance.
It seems to me to belong to the genus Pseudexechia. Is that the case ?
Thank you for the help.
Bruno RIGHETTI : France : Les Bondons : 48400 : 06/12/2020
Altitude : 1000 m - Taille : 4 mm (LAA)
Réf. : 279487
Bruno RIGHETTI : France : Les Bondons : 48400 : 06/12/2020
Altitude : 1000 m - Taille : 4 mm (LAA)
Réf. : 279488
Bruno RIGHETTI : France : Les Bondons : 48400 : 06/12/2020
Altitude : 1000 m - Taille : 4 mm (LAA)
Réf. : 279486
Posted by Bruno48 on 18-04-2021 16:11
#2
Wing venation seems to be typical but is it suficient ?
Posted by Paul Beuk on 20-04-2021 06:59
#3
Exechiopsis s.str. With the specimen it would be possible to give the species name.
Posted by Bruno48 on 20-04-2021 17:15
#4
Thank you Paul.if you agree I will send it to you.
Best regards
Posted by Paul Beuk on 21-04-2021 08:18
#5
It is most welcome. I'll send you the address.
Posted by Paul Beuk on 01-05-2021 14:33
#6
For the time being it is going to be stored as
Exechiopsis (Exechiopsis) nr.
coremura. After first examination I ended up with two possible species but both of the scarce enough not to have been illustrated recently. In fact, the only illustrations of the genitalia were the ones in the original decsriptions (1928 and 1955, respectively) and not up to present day standards. After that I had a brief email exchange with Peter Chandler and he send me a reference specimen for one of the species,
E. coremura, from Spain. This specimen clearly fits the illustration provided by Edwards in 1928 (left). Your specimen closely resembles that species in general structure but there are some distinct differences. The inner median lobe of the gonostylus is much narrower than that in the
coremura specimen, the anterior setae on the ventral lobe of the gonostylus are somewhat thicker and more densly packerd and there are some differences on the complex of tergite IX and the cerci.
A possible alternative could be
Exechiopsis (Exechiopsis) oltenica but the illustration of the genitalia of that species (right) only show the ventral aspect and not the dorsal aspect (which should show the inner median lobe). Until I have seen a reference specimen for that species I cannot rule that one out.
Edited by Paul Beuk on 01-05-2021 14:38
Posted by Bruno48 on 02-05-2021 20:42
#7
Thank you very much for this precise and detailed information
Bruno