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Diptera.info :: Identification queries :: Diptera (adults)
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Tachinidae from the central France=> Bothria frontosa
clovis
#1 Print Post
Posted on 17-11-2022 17:18
Member

Location: North France, lille
Posts: 895
Joined: 08.06.10

Dear fellows dipterist,

I thought I would easely identify this relativly big tachindae (12mm), but I end out in dead end in keys I tried (central european key and Belshaw's)
On tachinidae.eu, I end on nothing...

So I guess I am wrong in the interpretation of one of the character... if someone has an idea to guide me

Caught an isolated calcarous area in the armoricain massif (schistics)

-Cheeks non hairy
-hairs on facial ridge
-3+3 katersternal setae
-Prosternum hairy
-4+4 post Dc
-fist post sutural prealar longer than last notapleural
-Eyes hairy and arista bare.
-orbital setae proclinates
-three bigest setae on humeral callus in triangle
-apical scutellar setae are not crossed
-Medial tibia: 4 ad
-syntergite 1+2: 1 marginal pair of setae
-marginal and mediaml discal setae on T3 and T4
-2 hairs of same length on radiocubital node.

www.galerie-insecte.org/galerie/image/dos315/big/Tachinaire%20chalonnes%20loire%20face.JPG
clovis : France : Mauges-sur-Loire : 49570 : 14/06/2022
Altitude : NR - Taille : 12 mm
Réf. : 315380
www.galerie-insecte.org/galerie/image/dos315/big/IMG_3877.JPG
clovis : France : Mauges-sur-Loire : 49570 : 14/06/2022
Altitude : NR - Taille : 12 mm
Réf. : 315376

www.galerie-insecte.org/galerie/image/dos315/big/IMG_3880.JPG
clovis : France : Mauges-sur-Loire : 49570 : 14/06/2022
Altitude : NR - Taille : 12 mm
Réf. : 315377

www.galerie-insecte.org/galerie/image/dos315/big/Tachinaire%20chalonnes%20loire.JPG
clovis : France : Mauges-sur-Loire : 49570 : 14/06/2022
Altitude : NR - Taille : 12 mm
Réf. : 315378
Edited by clovis on 01-12-2022 11:37
 
John Carr
#2 Print Post
Posted on 17-11-2022 19:32
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Location: Massachusetts, USA
Posts: 9141
Joined: 22.10.10

Try keying it with straight humeral setae.

When the North American key splits on the basis of humeral setae it adds: "if middle basal bristle forming an apparent angle with outer and inner basal bristles, this angle at least 160°; middle basal bristle usually medial to a line between outer basal and outer anterior bristles".
 
http://www.flickr.com/photos/31715949@N00
Zeegers
#3 Print Post
Posted on 18-11-2022 11:46
Member

Location: Soest, NL
Posts: 17644
Joined: 21.07.04

Looks like a candidate Bothria.
Let’s see if you can make that happen Smile

Theo
 
clovis
#4 Print Post
Posted on 19-11-2022 14:45
Member

Location: North France, lille
Posts: 895
Joined: 08.06.10

Shock Now I know why the specimen looked familar! A species I already know!!!

You are both perfetly right of course!
John pointed out the question I was wrong in the central europe key (and then, it is straight to Bothria!)
And in Tachinidae.eu, I justed cliqued on the wrong button at the hairs on radio cubital node...awkward


So Bothria frontosa it is, many thaks to you both for the help! Grin
 
Zeegers
#5 Print Post
Posted on 19-11-2022 18:29
Member

Location: Soest, NL
Posts: 17644
Joined: 21.07.04

Great ! Karma one up again Smile

I am not sure about the altitude, but 14th of June is extremely late for frontosa,
.

Theo
 
clovis
#6 Print Post
Posted on 20-11-2022 10:59
Member

Location: North France, lille
Posts: 895
Joined: 08.06.10

My area is quite flat (but place of capture is quite hight for the department, with 55m hight^^) and the place of capture is quite warm (some southern species there).
Central Tachinidae key has only two species (frontosa and subalpina). And fauna europaea mention only those two species for Europe. Is there other possibilities?
 
Zeegers
#7 Print Post
Posted on 20-11-2022 13:21
Member

Location: Soest, NL
Posts: 17644
Joined: 21.07.04

No, no other options, but subalpina would make more sense.
Frontosa is black and silvery surprising resembling Panzeria puparum, subalpina is nearly completely greyish dusted.

Theo
 
clovis
#8 Print Post
Posted on 21-11-2022 19:34
Member

Location: North France, lille
Posts: 895
Joined: 08.06.10

Another poorly named species?

I have to admit I ruled out, maybe to quickly, B subalpina on the wide space between eyes, about 1,3* an eye (and also on name...). Dusting are on half of the tergite.
But other character are not so clear: face looks sligtly convex.


www.galerie-insecte.org/galerie/image/dos315/big/IMG_3946.JPG
clovis : France : Mauges-sur-Loire : 49290 : 14/06/2022
Altitude : 39 m - Taille : 12 mm
Réf. : 315592
www.galerie-insecte.org/galerie/image/dos315/big/IMG_3950.JPG
clovis : France : Mauges-sur-Loire : 49290 : 14/06/2022
Altitude : 39 m - Taille : 12 mm
Réf. : 315593
 
Zeegers
#9 Print Post
Posted on 21-11-2022 21:05
Member

Location: Soest, NL
Posts: 17644
Joined: 21.07.04

It is, indeed, B. frontosa.
As said, pattern on abdomen is totally different, you can check for yourself.

Extremely late individual, at your latitude it should be active mid March - Beginning of April.


Theo
 
clovis
#10 Print Post
Posted on 21-11-2022 21:40
Member

Location: North France, lille
Posts: 895
Joined: 08.06.10

Shock My apologies, I noted wrongly when uploading the pictures, you are totaly right, this specimen was caught much earlier: 14/04/2022!!!

Many thanks for you help, and sorry for this mistake!
 
Zeegers
#11 Print Post
Posted on 22-11-2022 16:41
Member

Location: Soest, NL
Posts: 17644
Joined: 21.07.04

Well, nearly in the period I’d predicted. All clear !

Theo
 
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