Thread subject: Diptera.info :: Ctenophora pectionicornis (m) or Tanyptera atrata (m)

Posted by JarJar on 20-01-2019 23:04
#1
Hi there,

is it possible to ID this one? Maybe Ctenophora pectionicornis (male) or Tanyptera atrata (male)?

Thanks a lot and best regards,
Chris

Seen in: Germany, Baden-Württemberg, Freiburg im Breisgau, Rieselfeld, about 20mm, 26 April 2007

Posted by Sundew on 21-01-2019 01:01
#2
The two are rather similar indeed, and T. atrata is very variable as to abdomen colouring. It is a pity that we cannot have a closer look at the antennae, but the segments seem to be more complex in C. pectinicornis (compare http://edepot.wur... or https://ccw.natur..._2013e.pdf). The black mesonotum and the partly red, less complex antennae make me vote for T. atrata. The more constant abdominal pattern of C. pectinicornis does also not match well...
Regards, Sundew

Posted by JarJar on 21-01-2019 09:50
#3
Dear Sundew,

thanks a lot for your answer! Maybe the following picture can help to identify the animal Smile
As you wrote - a closer look at the antennae is useful - here we go. It´s not perfect - but I think better then the last one...

Best regards from the south of Germany,
Chris

Posted by Sundew on 22-01-2019 23:17
#4
T. atrata is still my favourite...

Posted by JarJar on 23-01-2019 17:56
#5
OK thanks a lot for your answer and help, Sundew Smile

Best regards,
Chris