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Paraleptophlebia cincta (Purple dun)

Paraleptophlebia cincta has been found from near Wick in the North of Scotland to the Lizard peninsula in Cornwall and also from Ireland.  Despite its wide distribution there are no large concentrations of records.  Due to its scattered distribution, little is known about this species.  The nymphs live chiefly in the pools and margins of rivers and stream, where they burrow into, and live in gravel, sand or mud on the bed of the watercourse or forage on moss covered stones.  The nymphs are poor swimmers but are adapted for burrowing and moving on moss covered stones.  They feed by filtering or gathering fine particulate organic detritus from the sediment.  There is one generation a year, which usually overwinters as nymphs, however P. cincta may also overwinter as eggs.  Emerging adults are found between May and August.

 


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Once mated, the female flies upstream and descends to the surface of the water where she releases her eggs in a single batch by dipping the tip of her abdomen into the water.  After releasing her eggs the spent female falls on to the surface.