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Small fly with spotted wings - Homoneura

Small fly with spotted wings - Homoneura
Sunnyvale, Santa Clara County, California, USA
November 12, 2007
This looks a lot like the Drosophila melanogaster candidate I recently submitted, however this one has very noticeable spots on the wings. A very small fly.

Images of this individual: tag all
Small fly with spotted wings - Homoneura Small fly with spotted wings - Homoneura

Moved from Lauxaniidae.

Thanks V!
for ID to genus!

Moved from Vinegar Flies.

Possibly a Homoneura. Neither a drosophilid nor a sciomyzid. Drososphilids are usually smaller, and neither family shows this kind of wing pattern.

I realized my size description, "very small fly" was pretty vague. I did not actually measure it, however the fly was on a wall in my bathroom and taken with a lens capable of 1:1. The original looked a bit blurry so I downsized and sharpened it a little. By using the original I can estimate that the size was probably between 3mm (1:1) and 6mm (1:2).

Don't get me wrong, I have much respect for your expertise which I have seen demonstrated on many pages, I am just trying to do a size approximation to add new information to go on. It is based on taking a photo of a ruler at the lenses closest focus and using that to measure the insect. Whether I was at closest focus is the question, but it is very hard to imagine taking a picture at less than 1:2 with this lens with a sitting duck just sitting there on the wall! Still, I intend to follow up the Lauxaniidae suggestion and see what I can find, thanks for the lead!

I don't see a marsh fly in this one, more likely it is fruit fly familie (Drosophilidae).
There are a lot of species besides Drosophila melanogaster!

Seems that I erred.
Spotted wings were what took me away from fruit fly. No doubt, I should leave these to the experts!

Thanks for the comments!
Drosophilidae, then? It is significantly different in proportions than some, with longer wing and body proportions however these are variable. I've recently been looking through several subspecies of Drosophila, but have not encountered spotted wing varieties. Interesting marsh fly picture! I'm not sure how to differentiate the two types of flies! Are marsh flies true flies with two wings? The abdomen looks almost like the wings - similar in length? The Drosophila seems to have wings longer than the abdomen, by a large margin. Maybe that is a good indicator?
Interesting to compare the two!

"...I should leave these to the experts!"
Actually, I think its more interesting this way!

Sciomyzidae, with thanks to Omar Fahmy
He IDed a later post. (I'd been searching for fruit flies!)

Here's yet another, which looks a lot like Mac's...

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