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Diptera.info :: Family forums :: Syrphidae
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Which Chelosia female?
Leif Bloss Carstensen
#1 Print Post
Posted on 19-01-2018 13:59
Member

Location: Denmark
Posts: 31
Joined: 15.09.14

I collected this female Cheilosia on 25 May 2015 at Vindelsbæk Bro in the middle of Jutland, Denmark. It is a very good location along a broad creek.

When I use various keys, I end at uviformis. As that species is very rare in Denmark, so I am probably wrong.

Length: approx. 9 mm

Here are some data. I hope I use the right terminology.

Eyes with very few white hairs. You have to look carefully for them.
Lunula: dark orange.
Third antennal segment: yellow-orange, round and longer than wide.
Thoraic dorsum: Long yellow hairs.
Scutellum: one black bristle and several yellow ones.
Femur: black with yellow tip.
Tibia: yellow.
Tarsi: First segment of hind legs is mostly dark and all final segments are black; other segments are yellow.
Tibia: yellow.
Sternites: 1 with a very small shining part, 2 with larger shining part, but all sternites clearly dusted.

I attach two low-quality pictures. If you need further details or pictures, please let me know.

Hope you can help me identify this female.

Best regards
Leif BC
 
Leif Bloss Carstensen
#2 Print Post
Posted on 19-01-2018 13:59
Member

Location: Denmark
Posts: 31
Joined: 15.09.14

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Leif Bloss Carstensen attached the following image:


[291.16Kb]
 
Leif Bloss Carstensen
#3 Print Post
Posted on 19-01-2018 14:00
Member

Location: Denmark
Posts: 31
Joined: 15.09.14

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Leif Bloss Carstensen attached the following image:


[247.53Kb]
 
Robert Zoralski
#4 Print Post
Posted on 19-01-2018 19:49
Member

Location: Gdansk, Poland
Posts: 173
Joined: 20.08.06

Indeed "flavipes" group. With such a description and pictures you do not really give us other options. Wink C. uviformis (=C. argentifrons) is its name. And areas adjacent to Baltic and Atlantic coasts is where that very rare species really lives. Grats!

R.
 
http://insects.of.pl
Leif Bloss Carstensen
#5 Print Post
Posted on 19-01-2018 20:03
Member

Location: Denmark
Posts: 31
Joined: 15.09.14

Thank you, Robert! Glad I found this species. Now I will try to find the larva ;-)

A nice weekend to you.

Br
Leif
 
Robert Zoralski
#6 Print Post
Posted on 19-01-2018 21:26
Member

Location: Gdansk, Poland
Posts: 173
Joined: 20.08.06

That would be really great. I do not think anyone found it. I'd look first for some halofile asteraceae having distribution along sea coasts only, e.g. Tripolium pannonicum. Check their stems and roots in the first days of april, then look for females gathering nearby potential host plants on april-may depending on the weather. Good luck!
Edited by Robert Zoralski on 19-01-2018 21:39
 
http://insects.of.pl
Leif Bloss Carstensen
#7 Print Post
Posted on 24-01-2018 22:42
Member

Location: Denmark
Posts: 31
Joined: 15.09.14

Thank you for the information. Sorry for my late reply. I no longer receive email notification when there is a reply; must have a look at my settings.

The location is 30 km from a fjord with brackish water and Tripolium pannonicum. I will probably visit the coast several times this year and of course look for larvae.

At the C. uviformis location there are many Caltha palustris, Geum rivale (Cheilosia pubera), Valeriana and Eupatorium cannabinum.

I will make a thread with a female Cheilosia that resembles uviformis. Maybe you can have a look at it.

Good luck to you, too!
 
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