[Syrphidae] Re: Regarding the occurrence of Eristalis transversa inEurope

[Chris Thompson]

Regarding the occurrence of Eristalis transversa in EuropeAll:

Obviously without any kind of voucher, etc., one should simply ignore this claim.

BUT if this is real, then this person should be able to produce a voucher. Eristalis transversa is a distinctive species, so even an image would be good enough;

As for the general aspects, I have been surprised to see that some RAT-TAILED maggots have great expanded their range and have become established far outside of their normal range.

One such species is Palpada vinetorum which is now widespread around the Pacific islands. And then Eristalinus taeniops has become established in California and Florida.

So, I do not discount an American (Nearctic) species, such as Eristalis transversus, which is one of the most abundant species around here, becoming a new immigrant in Europe, BUT we need documentation via vouchers, etc.

Sincerely,

Chris

from home


From: Andrius 
Sent: Monday, May 16, 2011 3:28 PM
To: Hoverfly discussion list 
Subject: [Syrphidae] Regarding the occurrence of Eristalis transversa inEurope

Hello everyone,

I would like to ask whether anyone knows about the occurrence facts of Eristalis transversa in Europe. The thing is that one of our students did a research on local fauna of Syrphidae here in Lithuania and caught one specimen that she rather confidently claims to be Eristalis transversa, which is actually a N.American species. I haven't yet seen the specimen myself and I don't know what publication or key to use in order to confirm/reject the identification, so I am asking for some help with this too. 
Thank you in advance for any ideas or suggestions regarding this matter.  


Andrius 

-----------------
Dr. Andrius Petrasiunas

Vilnius university
Faculty of Natural Sciences
Department of Zoology
Ciurlionio st. 21/27
LT 03101 Vilnius, Lithuania

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