Unidentified caddisfly larvae

This caddisfly larvae (Trichoptera: Hydroptilidae) appears to be restricted to a small stream west of Albany and was first collected in 2006. The cylindrical silk secretion case is unusual for southern Australian hydroptilids but common in the tropical north. Hydroptilids feed on microscopic algae.  The grid cells in the background are 1mm square. 

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