[Syrphidae] Re: Syrphids as invasive species

Tue Jan 6 18:28:24 GMT 2015

Thanks guys.

I realized about the errors... they are so obvious!!

My question was more about the general idea of invasive/introduced syrphid
species.

Best regards,

Ximo
El 06/01/2015 19:25, "Martin Hauser" <phycus at gmail.com> escribió:

> Cyrille,
>
> I second your identification, clearly predatory Cecidomyiidae! Also the E
> tenax is E. arbustorum (5516409) an the Simosyrphus (5507035) is a female
> of Eristalis stipator!
> 1599325 is Toxomerus politus
> And in the US they refer to Cheilosia grossa under C. corydon.... and this
> one was introduced as a biocontrol agent to fight the European thistle...
> 54544290 is Eupeodes, likely E. americanus
> 5454418 is Toxomerus marginatus
> 5454419 is my favorite, a Bombyliidae Poecilanthrax very likely P. lucifer
>
> I just realized there are much more records, but it is not worth my time
> going through that... another big database full of errors and useless
> information...
> Cheers
> Martin
>
> On Tue, Jan 6, 2015 at 10:00 AM, Cyrille DUSSAIX <
> cyrille.dussaix at orange.fr> wrote:
>
>>  Hi,
>>
>> Especially the pictures of 5485943, 5485944 (perhaps ?), 5485945,
>> 5485946  are not syrphid larvae but  Cecidomyiidae...
>>
>> Happy New Year.
>>
>>
>> Le 06/01/2015 17:28, Francis Gilbert a écrit :
>>
>>  The list doesn't look like a list of invasives, but of a random set of
>> pictures including a lot of invasives.
>>
>>
>>
>> Surely most invasive species have colonised because of humans, whether
>> deliberate or not, so the distinction does not seem to be a useful one. The
>> key point is that most colonisations fail, however they occur in the forst
>> place: it is the successful ones that become 'invasives' and the reasons
>> for that success are interesting and worth studying.
>>
>>
>>
>> Francis
>>
>>
>>
>>
>>
>> *From:* syrphidae-bounces at lists.nottingham.ac.uk [
>> mailto:syrphidae-bounces at lists.nottingham.ac.uk
>> <syrphidae-bounces at lists.nottingham.ac.uk>] *On Behalf Of *ximo mengual
>> sanchis
>> *Sent:* 06 January 2015 16:20
>> *To:* Hoverfly discussion list
>> *Subject:* [Syrphidae] Syrphids as invasive species
>>
>>
>>
>> Dear all,
>>
>> I would like to continue with the discussion on introduced species, and
>> if some of them may be considered 'invasive'.
>>
>> In the webpage invasive.org, dealing with invasive species for USA,
>> there is a list of syrphids:
>> http://www.invasive.org/browse/TaxImages.cfm?fam=475
>>
>> I have a special interest in *Simosyrphus grandicornis*, which has been
>> introduced to a number of Polynesian Islands and Hawaii. So, if this
>> species has been introduced by humans, why now consider it as invasive?
>>
>> Does anyone have more information about the introduction of *S.
>> grandicornis* or its invasiveness?
>>
>> Thanks for the helpful comments.
>>
>> Best wishes,
>>
>> Ximo
>>
>> ********************************************************
>> Dr. Ximo Mengual
>> Head of the Diptera Section
>> Stiftung Zoologisches Forschungsmuseum Alexander Koenig
>> Leibniz-Institut für Biodiversität der Tiere
>> Adenauerallee 160
>> D-53113  Bonn, Germany
>> Phone: 0049 (0)228 9122 292
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>>
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>>
>>
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>
>
> --
> Dr. Martin Hauser
> Senior Insect Biosystematist
> California Department of Food and Agriculture
> Plant Pest Diagnostics Branch
> 3294 Meadowview Road
> Sacramento, CA 95832-1448
> (916) 262-1154
> cell: 217-3902417
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>
>
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