Sphaerophoria potentillae

Sphaerophoria potentillae Claussen, 1984

Biology & ecology:

Larva unknown. Occurs in wet, unimproved grassland where adults have been found visiting Achillea sp., Tormentil Potentilla erecta and buttercups Ranunculus sp.

Distribution:

This species was added to the British list from wet Culm grasslands in North Devon by Stubbs (1989). It has been recorded from a handful of sites in the immediate vicinity of the original discovery and a site on Bodmin Moor, Cornwall in 2001. The occurrence of this species in Britain was predicted by Speight (1988), who illustrates the male genitalia. It was originally described from a series of bogs in northern Germany and has so far only been found in Norway, Denmark, the Netherlands, northern France and Britain (Speight, 2010), but there are few records.