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Diptera.info :: Family forums :: Syrphidae
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Hammerschmidtia ferruginea
Marion Friedrich
#1 Print Post
Posted on 20-07-2022 18:28
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Location: Saxony, Germany
Posts: 1064
Joined: 07.10.09

Hi,
I found some of these flies from end of May until now on a dead aspen in Germany, Saxony. I guess Hammerschmidtia ferruginea. Can the species be confirmed?

Greetings, Marion
Marion Friedrich attached the following image:


[200.37Kb]
Edited by Marion Friedrich on 21-07-2022 16:10
 
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Marion Friedrich
#2 Print Post
Posted on 20-07-2022 18:31
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Location: Saxony, Germany
Posts: 1064
Joined: 07.10.09

a female
Marion Friedrich attached the following image:


[181.32Kb]
 
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Marion Friedrich
#3 Print Post
Posted on 20-07-2022 18:32
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Location: Saxony, Germany
Posts: 1064
Joined: 07.10.09

another female
Marion Friedrich attached the following image:


[195.4Kb]
 
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Sundew
#4 Print Post
Posted on 21-07-2022 01:11
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Location: Berlin and Baden-W├╝rttemberg, Germany
Posts: 3799
Joined: 28.07.07

Wow - that looks interesting! In the Red List of Hoverflies of Saxony (https://www.natur...liegen.pdf) as well as the complete list of Germany (https://www.rote-...html#idx_h), the species is considered to be threatened with extinction. To reproduce successfully it needs recently fallen, mature Aspen logs. In the middle picture the female is ovipositing, so this log should remain on its place, which nature conservation workers should ensure.
I think your identification is highly probable, even though Hammerschmidtia and brown Brachyopa species are easily mixed up. In May I saw B. cf. testacea that looked rather similar but not fully identical. According to the key https://www.resea...E-2020.pdf Hammerschmidtia differs from Brachyopa as follows:
- vein R4+5 with apical section longer than crossvein r-m
- hind tibia with short strong black spines on anterior surface
- mesopleural anepisternum, postalar callus, and scutellum with strong bristles
- face of male with tubercle
The wing venation isn't depicted well in your photos, but I see strong bristles on the thorax and, in the middle picture, there might be spines on the hind tibia. Also the tubercle of the male face is visible.
Falk (https://www.flick...382148394/) shows only males, but they look very similar.
You should contact Dieter Doczkal to get an expert opinion and perhaps some advice on where to report and publish this find. If the species is really so rare and endangered, this could perhaps be used to justify the designation of miniature protected area (Fl├Ąchennaturdenkmal).
Much luck and best wishes, Sundew
 
Fred Fly
#5 Print Post
Posted on 21-07-2022 07:53
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Location: Germany
Posts: 361
Joined: 19.07.11

Hi, I can confirm Hammerschmidtia ferruginea. The species meanewhile spread to northern Germany and established in forests without any mature Aspen.
Regards
 
Rupert Huber
#6 Print Post
Posted on 21-07-2022 09:34
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Location: Germany / South-East Bavaria
Posts: 585
Joined: 19.07.07

Love it!

So hopefully my 13-years-old male in the gallery soon can finally end its desolate period of singledom. Wink
Best greetings
Rupert
 
Marion Friedrich
#7 Print Post
Posted on 21-07-2022 16:09
Member

Location: Saxony, Germany
Posts: 1064
Joined: 07.10.09

Hi,
many thanks for the detailed contribution with links and key and the confirmation of ID.
Rupert, I asked my females and they agreed to visit your Methuselah.
Best wishes, Marion
 
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