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Diptera.info :: Identification queries :: Diptera (adults)
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Tachinidae
kurt
#1 Print Post
Posted on 27-07-2009 20:23
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I think this fly is a Norwickia and had marklini last year in same place.
This one looks a bit different from that. Could species be told from this pictures?
Same fly on both pictures.

Photo from Nattsjön, Ångermanland, Sweden 62.56N 17.36 E 26 july 2009

Thanks for your help in advance

Regards

Kurt Holmqvist
kurt attached the following image:


[77.76Kb]
Edited by kurt on 27-07-2009 20:25
 
kurt
#2 Print Post
Posted on 27-07-2009 20:26
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One more
kurt attached the following image:


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Zeegers
#3 Print Post
Posted on 27-07-2009 21:59
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Yes, it is Nowickia marklini (or the rare and very similar alpina)

THeo
 
kurt
#4 Print Post
Posted on 27-07-2009 22:27
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Thanks for your answer Theo.

I have some more photos of another speciemen from same lokation and day, but abdomen looking quite different.
I will post a new thread later.
What needs to see on fotos to sort out alpina?
 
Zeegers
#5 Print Post
Posted on 28-07-2009 08:53
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Oh, that is difficult.
I guess I'd need a very good lateral head shot.
I need to see the length of the arista relative to the antenna.


Theo
 
ChrisR
#6 Print Post
Posted on 28-07-2009 11:09
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I know it's not a keyable feature but N.marklini (and possibly alpina?) appears to be much blacker than other European species - I have never seen them close-up but I examined a good series of marklini in Moscow this year. Smile
Manager of the UK Species Inventory in the Angela Marmont Centre for UK Biodiversity at the Natural History Museum, London.
 
http://tachinidae.org.uk
Jaakko
#7 Print Post
Posted on 07-08-2009 13:13
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Hi,

Using the T&H it is not possible to reliably identify the Scandinavian specimens of marklini and alpina. All the alpina I have seen have been on treeless mountaintops ja marklini in lowlands. Typically marklini is much bigger, but this in parasitoids is not a good feature as you know. Some differences:

N. alpina
Hairs behind the head cream-white
Face with greyish-white pollination, fronto-orbital region almost black
Males: preandrial sternite "blunt arrow" -shaped

N. marklini
Overall more orange appearance: hairs behind the head orange, also calypters, basicosta and facial pollination rather orange. Basicosta can be black in some specimens! Fronto-orbital region with unpollinated small dots. Preandrial sternite different.

Probably bigger differences in the male genitalia, but I haven't checked them... By comparison these two species are easy to differentiate.

The fly in the photos looks like a marklini, also the habitat makes this likelier.

Jaakko
Edited by Jaakko on 07-08-2009 13:17
 
kurt
#8 Print Post
Posted on 07-08-2009 19:46
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Thanks for your good explenation of differenses between marklini and alpina.

Kurt Holmqvist
 
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