[Syrphidae] Re: introduced Syrphidae ?

[Hoverfly discussion list]

Hi Kurt & Jeroen,
 
I agree that Merodon equestris is a good example. 
I'm not so sure about these two Cheilosia species. The host plant of C. semifasciata is indigenous in the Netherlands, so this syrphid was probably already present before Sedum tectorum (and related species) became popular in gardens. Cheilosia caerulescens lives in Sempervivum, which is not indigenous, but this syrphid may have dispersed from its Central European range (where Sempervivum occurs naturally). Of course, both species may have ben introduced subsequently to several gardens throughout Europe, but I think it's not possible to distinguish such local introductions from natural dispersal (at least not anymore). 
I think that Cheilosia grossa or albipila (forgot which one, but search for its synonym C. corydon) was introduced to the USA for biological control of thistles. The suitability of C. urbana and C. psilophthalma as biological controllers of certain introduced weeds in New Zealand has been studied, but I don't think these species have actually been introduced there (you should be able to find literature about this).
I know that some species of Eumerus were introduced to South America. There are publications about this too. 
Syritta pipiens was introduced to North America (also occurs in Mexico).
 
So far some things  that popped into my mind!
 
All the best,
 
Menno

 
Date: Fri, 5 Dec 2014 10:23:50 +0100
To: syrphidae at lists.nottingham.ac.uk
From: syrphidae at lists.nottingham.ac.uk
Subject: [Syrphidae] Re: introduced Syrphidae ?

Dear Kurt
I would say Merodon equestris, Cheilosia caerulescens and even Cheilosia semifasciata are examples too. In the Netherlands at least. Maybe more Cheilosia species like psilophthalma (Australia or New Zealand) and albipilla or grossa (USA).
Other widespread species (non native) but maybe not introduced by human are Syritta pipiens, Eristalinus aeneus, Eumerus tuberculatus.

Best wishes, Jeroen.
2014-12-05 10:17 GMT+01:00 Hoverfly discussion list <syrphidae at lists.nottingham.ac.uk>:








Dear all,
 
Does anyone have any idea which syrphid species have been introduced elsewhere? I only know of Ornidia obesa and (possibly?) Eristalis tenax. I could not find records of other introductions but would very much appreciate any other report
 on introduced Syrphidae.
 
Many thanks in advance!
Kurt
 
--------------------------------------------------------
Kurt Jordaens
Royal Museum for Central Africa
Entomology Section
Leuvensesteenweg 13
B-3080 Tervuren
tel.: +32 2 769 5373
fax: +32 2 769 5642
--------------------------------------------------------
 


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