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Sphaerophoria potentillae

 
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stuart
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Joined: 11 May 2005
Posts: 737
Location: Peterborough, UK

PostPosted: Sat May 28, 2005 5:39 pm    Post subject: Sphaerophoria potentillae Reply with quote

Sphaerophoria potentillae Claussen, 1984

Identification ease/difficulty: 4

Sources of information
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stuart
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Joined: 11 May 2005
Posts: 737
Location: Peterborough, UK

PostPosted: Sun May 29, 2005 8:41 am    Post subject: Species account from the Provisional atlas Reply with quote

Species account from Provisional atlas of British hoverflies, Ball & Morris, 2000.

Sphaerophoria potentillae Claussen, 1984

Biology: Larvae unknown. Occurs in wet, unimproved grassland where adults have been found visiting Achillea, Potentilla erecta and Ranunculus

Distribution: This species was added to the British list from wet Culm grasslands in North Devon by Stubbs (1989), and so far has only been recorded from a handful of sites in the immediate vicinity of the original discovery. The occurrence of this species in Britain was predicted by Speight (1988a), who illustrates the male genitalia. A new key to the British members of the genus is given by Stubbs (1996). It was originally described from a series of bogs in northern Germany and has so far only been found in Denmark, the Netherlands and Britain (Speight, 1998), but there are few records as yet
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