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Diptera.info :: Identification queries :: Diptera (adults)
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Cylindromyia intermedia? --> C. brassicaria f
Jann Wuebbenhorst
#1 Print Post
Posted on 14-01-2022 20:06
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Location: Northern Germany, Lower Saxony
Posts: 458
Joined: 10.03.17

I found this Cylindromyia on 19th June 2021 on nutrient-poor grassland in the very east of Niedersachsen (Germany), Landkreis L√ľneburg.
I tried to identify it using the key of Tschorsnig & Herting (2005). But as a tachinid beginner, I find it difficult to identify all the bristles and other features mentioned in the key.
Jann
Jann Wuebbenhorst attached the following image:


[140.54Kb]
Edited by Jann Wuebbenhorst on 15-01-2022 16:47
 
Jann Wuebbenhorst
#2 Print Post
Posted on 14-01-2022 20:07
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Location: Northern Germany, Lower Saxony
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Joined: 10.03.17

Here are my suggestions:
1. hind tibia with pv-bristles
Jann Wuebbenhorst attached the following image:


[149.32Kb]
 
Jann Wuebbenhorst
#3 Print Post
Posted on 14-01-2022 20:09
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Location: Northern Germany, Lower Saxony
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2. crossed apical scutellar bristles present
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[197.52Kb]
 
Jann Wuebbenhorst
#4 Print Post
Posted on 14-01-2022 20:11
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Location: Northern Germany, Lower Saxony
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3. Abdomen without discal bristles
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[148.47Kb]
 
Jann Wuebbenhorst
#5 Print Post
Posted on 14-01-2022 20:12
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Location: Northern Germany, Lower Saxony
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4. Third antennal segment quite long
Jann Wuebbenhorst attached the following image:


[147.8Kb]
Edited by Jann Wuebbenhorst on 14-01-2022 20:12
 
Jann Wuebbenhorst
#6 Print Post
Posted on 14-01-2022 20:13
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Location: Northern Germany, Lower Saxony
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5. I'm unsure about the bristles on the middle tibia
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[129.45Kb]
 
Zeegers
#7 Print Post
Posted on 15-01-2022 10:55
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Location: Soest, NL
Posts: 17164
Joined: 21.07.04

Yes, difficult genus. Antenne is longer and more orange in intermedia. If a basal scutellar bristle is present, intermedia is highly unlikely.
So this is a small female brassicaria.

Theo
 
Jann Wuebbenhorst
#8 Print Post
Posted on 15-01-2022 13:16
Member

Location: Northern Germany, Lower Saxony
Posts: 458
Joined: 10.03.17

Thank you again, Theo!
So there's a problem already in the first step of the key, where I decided for 1b (hind tibia with pv -bristles).
Am I wrong with the bristles (as shown in fig. 163 in Tschorsnig & Herting)? Or is this feature not always valid?

Jann
Edited by Jann Wuebbenhorst on 15-01-2022 16:46
 
Zeegers
#9 Print Post
Posted on 15-01-2022 14:05
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Location: Soest, NL
Posts: 17164
Joined: 21.07.04

??

P. = posterior, so backside

pd can never be in front of ad.


Theo
 
Jann Wuebbenhorst
#10 Print Post
Posted on 15-01-2022 16:46
Member

Location: Northern Germany, Lower Saxony
Posts: 458
Joined: 10.03.17

Yes, of course it is the other way round!
I didn't realize that fig. 163 in Tschorsnig & Herting shows the LEFT hind tibia, my photo shows the RIGHT hind tibia - sorry.
Edited by Jann Wuebbenhorst on 16-01-2022 12:04
 
Zeegers
#11 Print Post
Posted on 15-01-2022 17:20
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Location: Soest, NL
Posts: 17164
Joined: 21.07.04

You song again "Upside down you turn me"?


Theo
 
Jann Wuebbenhorst
#12 Print Post
Posted on 16-01-2022 12:06
Member

Location: Northern Germany, Lower Saxony
Posts: 458
Joined: 10.03.17

O.k., I think now I've got it.
pv bristles missing.

Jann
Jann Wuebbenhorst attached the following image:


[263.16Kb]
 
Zeegers
#13 Print Post
Posted on 16-01-2022 12:39
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Location: Soest, NL
Posts: 17164
Joined: 21.07.04

It is very easy to make these kind of mistakes from pictures. Glad you got it.

Theo
 
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