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View Thread :: Identification queries :: Diptera (adults)
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Dipteran IDing and unknown species from Pacific Island
#1 Print Post
Posted on 02-07-2021 09:33

Posts: 21
Joined: 30.06.21

Dear Dipteran community,

I am a researching ecologist and - after having worked the last years mainly on litter invertebrates - I recently got into investigating also the winged part of the arthropod community. I have so far little experience with Diptera identification and thus wanted to ask you for any recommendations and things to consider specifically when preparing sampled dipterans (mainly pitfall and malaise traps) for identification? I am happy for any input that you have for me.

My work is based on tropical Pacific island, for which I found little literature on Dipteran diversity and, although Ramage (2007) published a checklist of arthropods from this region (see, I assume the list is far from comprehensive for this diverse group of insects. Are you aware of any Dipteran identification key from this region (probably Indo-Malayian / Australia / Oceania) that might be useful for my planned work?

Besides the endemic but easy-to-recognise coconut fly Scholastes lonchifer, I was able to collect two different Brachycerans (presumably), which I identified as sciarid (maybe Bradysia?) and cecidomyiid, respectively. I attached pictures of both species to this message, and wanted to kindly ask if anyone can have a look at them and let me know if I am on the right track IDing those. I apologise for the overall poor quality of both the picture and the sample, but I am just starting to set up both the microscope and the sampling and preparation procedure, so I hope I might be able to provide better pictures, once I've also learnt what the relevant diagnostics and structures are for IDing dipterans.

thank you very much for your help. I am looking forward to learn more about dipteran identification!
All the best
basti_st attached the following image:

#2 Print Post
Posted on 02-07-2021 09:38

Posts: 21
Joined: 30.06.21

Sorry, I just noticed that the second image did not upload. Here is the picture of the second species, presumably a cecidomyiid?
basti_st attached the following image:

Tony Irwin
#3 Print Post
Posted on 02-07-2021 13:34
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Location: Norwich, England
Posts: 6700
Joined: 19.11.04

I would agree with both of your family identifications - Sciaridae and Cecidomyiidae. Taking them further, particularly as you are dealing with a remote island fauna, may be more difficult. Smile
Tony Irwin
John Carr
#4 Print Post
Posted on 02-07-2021 14:58
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Location: Massachusetts, USA
Posts: 8675
Joined: 22.10.10

Oosterbroek's The families of Diptera of the Malay Archipelago may be useful.
#5 Print Post
Posted on 02-07-2021 15:39
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Location: Debrecen, Hungary
Posts: 5378
Joined: 02.03.05

Tony Irwin wrote:
I would agree with both of your family identifications - Sciaridae and Cecidomyiidae. Taking them further, particularly as you are dealing with a remote island fauna, may be more difficult. Smile

This may be an understatement Smile
Gabor Keresztes

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23.09.21 15:29
All sorted.

16.09.21 22:24
Sorry put 5 new threads in Asilidae forum instead in Syrphidae forum, can pleas an admin move it to Syrph? THANKS, Norbert

09.09.21 07:48

09.09.21 07:47
wing ventation is totally different

03.09.21 12:51
Hi, what's the major difference between dolichopodidae and rhagionidae? Can someone help me? Thanks!

28.06.21 15:24
thx TO eklans

03.06.21 11:11
@Tony Irwin Thank you Tony! I've emailed you there Pfft

02.06.21 22:26
Rob - can you PM me with an e-mail address, and I'll send it over.

02.06.21 13:16
Hello chaps! Does anyone have a copy of: Revision of the willow catkin flies, genus Egle Robineau-Desvoidy (Diptera: Anthomyiidae), in Europe and neighbouring areas ?? I'd be ever so grateful! Rob

31.05.21 14:31
The part that got deleted is "longer, dark median stripe on thorax"

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