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Heringia brevidens

 
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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: Heringia brevidens Reply with quote

Heringia brevidens (Egger, 1865)

NomenclatureIdentification ease/difficulty: 4

StatusSources 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.

Heringia brevidens (Egger, 1865) Neocnemodon brevidens (Egger) in Stubbs & Falk (1983)

Biology: Larvae unknown. There is a possible association with poplar, including Populus and Salix fringing small ponds in other types of woodland. Adults can be seen visiting flowers (e.g. Caltha palustris, Rubus), but they typically fly very close to the ground, making them very difficult to spot.

Distribution: This species was added to the British list in 1980, but specimens in collections date back to 1949. There are very few records, widely scattered in England
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stuart
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Joined: 11 May 2005
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Location: Peterborough, UK

PostPosted: Sun May 29, 2005 9:09 am    Post subject: Data sheet from National Review of Diptera, Falk, 1991 Reply with quote

Datasheet from the Review of Scarce and Threatened Diptera, Falk (1991).

NEOCNEMODON BREVIDENS (Egger) NOTABLE

DISTRIBUTION Only four sites to date: Mitcham Common, Surrey (1949); Scout Park, Middlesex (1948); Denford, Berkshire (1989) and Clowes Wood, Warwickshire (1976).

HABITAT Uncertain, probably damp woodland. At the Surrey site an adult was on the flowers of Caltha suggesting an association with alder carr or other wet habitat and the recent Berkshire record was from similar situations.

ECOLOGY Known larvae of Neocnemodon species are arborial predators of adelgid plant bugs on conifers, though it is unlikely that this species is associated with conifers and it may utilise woolly aphids on trees such as alders. Adults recorded from late April to early May.

STATUS Only the Warwickshire record is recent. Its occurrence in Britain has only been recognised in the past few years and it may yet prove to be more widespread. Females of this genus cannot yet be identified further reducing the potential number of records.

THREAT Clearance of woodland and carr for agriculture and intensive forestry.

MANAGEMENT Maintain the presence of open rides and clearings within woodland, with flowers for adult feeding.
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