Thread subject: Diptera.info :: Drosophilidae --> Drosophila testacea (?)
Posted by Jan Maca on 20-08-2018 14:50
#2
Practically no cues how to dtermine these flies. I guess Drosophila testacea, with caution.
Posted by gertvanheghe on 20-08-2018 19:19
#3
Thanks, Jan!
Drosophila testacea seems to be rare around here...
Posted by Carnifex on 20-08-2018 21:23
#4
I would say this is Hirtodrosophila (confusa), the polypore is a good habitat
Cheers,
Lorin
Posted by Jan Maca on 21-08-2018 09:34
#5
I do not see conspicuous oviprovector of female, nor darkened end of abdomen, which is characteristic for the male of confusa. But - who knows; details are scarcely visible. You may judge according to the body dimensions - testacea is as big/small as melanogaster, confusa is usually twice larger (longer), or even more.
Posted by johnes81 on 21-08-2018 10:29
#6
Hello Gert,
I think that Paul is on vacation, so you should bump this post when he returns. I have keys but useful features are not visible, such as arista and mesotibia. However,
D. testacea is supposed to have distinct presutural acrostichals, which appear to be absent in the photos.
Hirtodrosophila is supposed to have
interrupted bands on the abdomen but they appear to be
uninterrupted. Otherwise, not a bad suggestion. I think that
Drosophila are very difficult to id without a great deal of experience and better photos. Paul may be able to suggest a species when he returns.
Also,
diptera.info is the best place for dipterists not iNaturalist.
Posted by Paul Beuk on 21-08-2018 19:19
#7
I pass with these images. Some flies are perhaps not fully coloured making it difficult to jusdge on abdominal pattern. I cannot discern ant larfer presutural setae on the mesonotum so I cannot confitm
testacea...
Posted by gertvanheghe on 22-08-2018 19:34
#8
Thanks to all, for your help, ideas and suggestions!
I agree that this is a difficult case by lack of better photos, and dimensions.
We'll leave it like this, if you all agree.
Best regards,
Gert
