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Hi,
Today I met this small Anthomyiid male in a wood. The hairy eyes are striking! Is genus Lasiomma the only genus with this character? A very likeable taxon in this case :D. In thread http://www.dipter...d_id=45210 Joke gave a picture of different hair lengths in different species. I tend to L. anthomyinum, but a confirmation or correction would be great!
Thanks, Sundew

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Where are our Anthomyiid experts?

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I only can see two av setae on the hindtibia, so more likely Lasiomma seminiditum.
To be sure, I need a sharp view of the chaetotaxy from the hindleg (femur and tibia)

Johanna

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Dear Johanna,
Though I studied thoroughly your drawings of leg chaetotaxy in a former thread, identifying the position of the bristles remains a crux. I add some views of the hind tibiae from different directions, but the av setae are not clear, to me they could also be ad. The view from behind is especially puzzling, but the two left pictures show at least 2 setae - is your eye keen enough to discriminate between av and ad? Otherwise the fly remains Lasiomma spec.

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I made an overview of the legs chaetotaxy......(only for the three species with relative long hairs on the eyes)

Johanna

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another one

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last one

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Dear Johanna,
Your explanations are always so comprehensive and clear - big thanks for all your efforts! The learning effect is immense. The theory of leg chaetotaxy (naming the position of bristles) is clear, but the transfer to a tiny, flexed leg of a living fly is still difficult! I should better practise it on a dead fly with a stereo microscope.
As to our Lasiomma, the hind leg is rotated about 45°. Mentally put back into ideal position, the two left setae seen in the left pics may well be av. The femoral setae seem to be rather long, too. So L. seminitidum is really a good choice! Thanks once more - it is great to get such detailed information and not only a name |t.