[Syrphidae] Re: larva

[Cyrille DUSSAIX]

Hi,
First, where was the larva found?
Maybe, Pocota personata?
See attached document (description) and this website for various 
illustrations : 
http://cyrille.dussaix.pagesperso-orange.fr/_SYRPHIDAE_LARVA_DC2020/_Index.html
Thank of your opinion after control.
Greetings.
Cyrille.

Le 22/06/2021 à 12:27, Nobby Scarlet a écrit :
> Hello Francis,
>
> In attachment some more pictures but i have a hard time taking good 
> pictures...
>
> Maybe these help and off course i understand if further determination 
> is not possible by  means of pictures.
>
> I was surprised by the extruded anal gills and did not see this in any 
> picture of hoverfly larvae and learned a lot thanks to the reply of 
> members of this list!
>
> Thank you !
> Nobby
>
> ------ Origineel bericht ------
> Van: "Francis Gilbert" <Francis.Gilbert at nottingham.ac.uk 
> <mailto:Francis.Gilbert at nottingham.ac.uk>>
> Aan: "Nobby Scarlet" <nobby.thys at scarlet.be 
> <mailto:nobby.thys at scarlet.be>>; "hoverfly discussion list" 
> <syrphidae at lists.nottingham.ac.uk 
> <mailto:syrphidae at lists.nottingham.ac.uk>>
> Verzonden: 22-6-2021 09:36:56
> Onderwerp: RE: [Syrphidae] larva
>
>> hi Nobby
>>
>> The larva seems tobe an eristaline but we need a picture of the whole 
>> larva, really. The "smaller kind of tubes" are the extruded anal 
>> "gills" that are usually held within the rectum, and are almost 
>> certainly involved in active ionic exchanges. If we could see them 
>> all, together with any lappets at the end of the body (base of the 
>> 'tail') and the anterior spiracles clearly (they are there but very 
>> out of focus) then we might stand a chance of identifying it.
>>
>> Best wishes
>>
>> Francis
>>
>> *From:*syrphidae-bounces at lists.nottingham.ac.uk 
>> <mailto:syrphidae-bounces at lists.nottingham.ac.uk> 
>> [mailto:syrphidae-bounces at lists.nottingham.ac.uk 
>> <mailto:syrphidae-bounces at lists.nottingham.ac.uk>] *On Behalf Of 
>> *Nobby Scarlet
>> *Sent:* 21 June 2021 19:27
>> *To:* hoverfly discussion list <syrphidae at lists.nottingham.ac.uk 
>> <mailto:syrphidae at lists.nottingham.ac.uk>>
>> *Subject:* [Syrphidae] larva
>>
>>     Hello,
>>
>> I found this larva in a running water in Limburg.
>>
>> I have never seen a larve with a respiratory tube and different 
>> smallers kind of tubes near the base...
>>
>> Does anyone recognize the species of genus ?
>>
>> Greetings,
>>
>> Nobby
>>
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