Glaenocorisa propinqua is said to be found in acidic open water with sparse vegetation. It is common in deep upland pools where it spends most of it’s time at considerable depth. It is a nocturnal feeder and mainly predatory feeding on rotifers, copepods, water fleas and algae, straining them out with long hairs on the front limbs. The lifecycle is unkown but they probably over winter as adults.

It is a retreating a “glacial relict” species who’s distribution is moving more Northwards.  

They are identified by being a large (7.5 – 9mm), dark coloured corixid with bulging eyes and long rear legs. The hairs on their face are longer and more abundant than Arctocorisa. 

While they are generally recorded in the UK as Glaenocorisa propinqua there are two subspecies which are identified separately in Europe.

Glaenocorisa propinqua propinqua. This is in upland lakes with a more Southern distribution and can be identified by the pegs on the male palae have a rounded and do not touch the margin 

Glaenocorisa propinqua cavifrons. This is in upland lakes with a more Northern distribution and identified by the pegs on the male palae have more triangular kink with the point reaching the margin.