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Wood Gnat

?Sylvicola dubius

Description:

About 12mm long; orange eyes (touching?); black shiny thorax; long legs; patterns with bands in wings.

Habitat:

Attracted to strong night lights at the local school.

Notes:

One of only 3 Sylvicola in Australia. S dubius is described as having simple antennae which are two toned - pale scape and black apically. (Tony D. & Ken Walker) http://farm6.staticflickr.com/5315/58476... Another one we found and forgot about 8-( http://www.projectnoah.org/spottings/128...

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24 Comments

Mark Ridgway
Mark Ridgway 10 years ago

I think the photo is just not good enough. I've checked with others around Melbourne and the consensus is that species is plaguing right now... I'll leave the question mark.

stho002
stho002 10 years ago

The problem remains that your photo suggests aristate antennae which don't appear to match Sylvicola, except just superficially in being pale basally, and otherwise black...

Mark Ridgway
Mark Ridgway 10 years ago

Sylvicola dubius - thanks guys.

bayucca
bayucca 10 years ago

@Stephen: Can you, please, take a look at this one as well:
http://www.projectnoah.org/spottings/435...
I would like to have an address from you. So, please, can you send me a mail?
http://www.projectnoah.org/users/bayucca...
Thanks!

Mark Ridgway
Mark Ridgway 10 years ago

Thanks Stephen - I'll keep it in the mystery basket for a while then. The photo is definitely rubbish - serves me right!

stho002
stho002 10 years ago

No, the Flickr photo is a female Sylvicola, no doubt about it. The antennae are segmented all the way to the tip, and the basal segment, although lighter in colour, isn't much wider than the next segment. It might just be your photo, but your fly looks like it has usual brachyceran-type antennae, with a long filamentous arista

Mark Ridgway
Mark Ridgway 10 years ago

..I must add I have found what I believe is the same but female by flyman13 on flickr who lives just up the road.... http://www.flickr.com/photos/69610519@N0...

Mark Ridgway
Mark Ridgway 10 years ago

Thanks guys.. I'll put it to Shaun W. for comment and try to get a bit more out of the pics.

bayucca
bayucca 10 years ago

OK, Stephen, you are talking down-under for me... ;-)... I first would have to google holoptic and aristate not to forget the families you mentioned. I checked 28 pages of Australian diptera on flickr and did not found any reasonable or close match, many unid and a lot about anatomy and variability of this order. So, for me it is finally just time to give up. Thanks for your support!

stho002
stho002 10 years ago

It is clearly a holoptic male (eyes make up most of head), but the antennae appear to be aristate (which excludes Sylvicola and other nematocerans), though this could be just bad focus. Try asking Shaun Winterton (who works on therevids and apsilocephalids) ..

Mark Ridgway
Mark Ridgway 10 years ago

Thanks for looking at it anyway bayucca.... they don't call us 'down-under' for nothing. :-)

bayucca
bayucca 10 years ago

I can see some orange at the base of the antennae as well in:
http://lifeunseen.com/index2_item_5665.p...
But as I commented below the head looks the other way round: Black in front and "white" behind vs. black behind and white in front in yours. Really strange...

Mark Ridgway
Mark Ridgway 10 years ago

I think the rest of the head is 'all eyes'

Mark Ridgway
Mark Ridgway 10 years ago

No I think that might be what Stephen was talking about. There's definitely orange 'bases' that the antennae come from. That seems to me the only obvious difference I can see with the UK Sylvicola linked at ispotnature below.

bayucca
bayucca 10 years ago

Actually I have still difficulties to judge the antennae design. Is this orange-colored patch on the head a light reflection?

bayucca
bayucca 10 years ago

There are too much F's on the screen ;-)...

Mark Ridgway
Mark Ridgway 10 years ago

Flies are Fairly Fantastic Doc... but I was referring to the search as being Fun.

http://www.ispotnature.org/sites/default...

Mark Ridgway
Mark Ridgway 10 years ago

flimsy feeble feelers? :-)

bayucca
bayucca 10 years ago

Can Diptera be fun...? ;-)...
Looks at first sight like a Sylvicola, but if you look closer than you see that the eyes/head are different. Actually I was asking myself where the eyes really are...
@Stephen: Why do you think the antennae are wrong for Sylvicola?

Mark Ridgway
Mark Ridgway 10 years ago

Ok thanks... some fun coming up.

stho002
stho002 10 years ago

Possibly even Apsilocephalidae!

stho002
stho002 10 years ago

Maybe, though the antennae are strange

Mark Ridgway
Mark Ridgway 10 years ago

Thanks Stephen - any chance of Therevidae?

stho002
stho002 10 years ago

Looks like Sylvicola (wood gnat), but antennae are wrong. Maybe a soldier fly (Stratiomyidae)?

Mark Ridgway
Spotted by
Mark Ridgway

Melbourne, Victoria, Australia

Spotted on Oct 4, 2013
Submitted on Oct 5, 2013

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