Sharp’s parallel diver beetle

Hydroporus longicornis is a tiny (3.5-3.8 mm) diving beetle, which lives in open, boggy channels in the uplands. It has a uniform dark upper surface, with reddish legs. The shape of the front half of the shell is almost parallel-sided which gives it its common name along with its originator, David Sharp.

 

It is rarely recorded, but its scarcity or threat status might be in doubt as it occupies a relatively common habitat. It is however confined to natural habitats of this type as it has never been found in severely modified habitats. It is therefore of great value as a habitat indicator.

 

Their isolation places them at risk of extinction through the possibility of drought. They are also under threat due to drainage for pasture improvement or from planting trees.