Can anyone identify this freshwater invertebrate?

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An animal in not a rock (e.g., Koch 2013), it has an internal constitution that can be modified?

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I need help with Identification (misidentification) of European Pisidiidae & Sphaeriidae?

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Which river basin has lowest total replenishable groundwater resources &utilization of irrigation potential created lags behind potential created why?

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Sunil Kumar Padhi

Seems like larval form of Caddiesfly (Group-Trichoptera)

Ton van Haaren

Most likely bathynellacea. The First thing that came to my mind was the larvae of an Empididae, but I think that on the left side I may see a distinct head making Bathynellacea more likely.

Gaurav H Tandon

Google Reverse Image search shows it to be Grass seed-Sod webworm (cranberry girdler)