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I found this larva on a mudflat of the Rupel, a freshwater tidal river in Belgium. Could it be a Fanniidae-species?

Best regards,
Jan

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Couldn't attach the picture
Next try!
Jan

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hopefully it is now attached!
size should be ok.
Jan

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hardly we can say anything with this image. try to get a good close-up at posterior part. And the marginals of segments too.

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a more detailed picture,
Jan

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another picture with a ventral view
Jan

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I went trough some more literature (Smith) and now I know quite sure that it must be Dohrniphora cornuta
an alien species!
Larvae are found in sewage, compost, dead insects and snails.
This time in a (polluted) estuary accompanied by loads of Tubificid oligochaets and Psychodidae.

Jan

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Also see http://www.dipter...ticle_id=5 where there is a link to http://www.dipter...?page_id=8.