Return to HRS home page Dipterists Forum
A Dipterists Forum recording scheme

Navigation
Home
Forum
Photo gallery
Maps
Checklist
Hoverfly Newsletter
Memberlist
User-groups
FAQ
Search

User
Username:

Password:

 Remember me



I forgot my password

Don't have an account yet?
You can register for FREE


Search

Advanced Search

Who is Online

In total there are 4 users online :: 0 Registered, 0 Hidden and 4 Guests

Registered Users: None

[ View complete list ]


Most users ever online was 248 on Wed Dec 12, 2007 11:53 pm


Cheilosia velutina

 
Post new topic   Reply to topic    Hoverfly Recording Scheme Forum Index -> The Species
View previous topic :: View next topic  
Author Message
stuart
Site Admin


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

PostPosted: Sat May 28, 2005 5:39 pm    Post subject: Cheilosia velutina Reply with quote

Cheilosia velutina Loew, 1840

Identification ease/difficulty: 3

StatusSources of information
Back to top
View user's profile Send private message Send e-mail
stuart
Site Admin


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

PostPosted: Sun May 29, 2005 8:40 am    Post subject: Species account from the Provisional atlas Reply with quote

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

Cheilosia velutina Loew, 1840

Biology: The larval host is given as Scrophularia nodosa by Brischke (1880) and Speight (1998) quotes an American reference, according to which it mines the stems of Cirsium palustre. This is a very poorly-understood species whose habitat requirements are difficult to define. It is most frequently found in mid- to late summer amongst a profusion of its close relative, C. proxima, at the flowers of white umbells such as Pastinaca

Distribution: This species remains poorly known with very few confirmed records, mainly on the eastern side of Britain, including a recent one from near Edinburgh. It is perhaps most likely to be found where there is a profusion of C. proxima; checking a large number of specimens of this common species is essential if C. velutina is to be recorded
Back to top
View user's profile Send private message Send e-mail
stuart
Site Admin


Joined: 11 May 2005
Posts: 737
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).

CHEILOSIA VELUTINA Loew NOTABLE

DISTRIBUTION Records scattered widely in England and Scotland as far north as Midlothian with a strong southerly bias.

HABITAT Calcareous grassland, scrub and woodland, particularly on southern chalk areas. Occasionally occurring on non-calcareous sites. There have been reports of it occurring commonly on waste ground in certain localities, especially in calcareous districts.

ECOLOGY Larvae phytophagous, probably on a species of thistle Carduus or Cirsium. The adults are recorded from April to August and may be found feeding on umbels. The flight period suggests that two broods occur.

STATUS An infrequently recorded species with about 15 known post 1960 sites. However, it is frequently confused for the more frequent C. proxima with which it often occurs and has probably been under recorded to some extent, both in collections and in the field. Status revised from RDB3 (Shirt 1987).

THREAT Habitat loss to agriculture or intensive forestry. Changes in the grazing management of grassland with subsequent scrub invasion and a loss of floristic richness and diversity. Waste ground can by its nature be transient when specific measures are taken.

MANAGEMENT This should concentrate upon maintaining a healthy population of thistles. Rotational grazing policies to produce a mosaic of vegetation types should be considered. Its use of waste ground may provide opportunities in some cases to link in with urban conservation management, with the need to ensure continuity of pioneer vegetation, perhaps involving rotovation or bulldozing selected parts of a site.
Back to top
View user's profile Send private message Send e-mail
Display posts from previous:   
Post new topic   Reply to topic    Hoverfly Recording Scheme Forum Index -> The Species All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum


Powered by phpBB © 2001, 2005 phpBB Group