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it looks very much like Psychodidae, it shows posterior floating hairs and lateral appendages. In my opinion larva of Psychodidae are very hard to identify and often need high magnification of the head capsule, and the details are better seen after clearing. When I see the encrustations (or silt deposits?) on the abdomen it must be a member of Pericoma. Also this genus fits the habitat even better than other genera.