Diptera.info :: Identification queries :: Diptera (adults)
 Ephydridae (01.09.2018) --> Paracoenia fumosa
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| fatsemann |
Posted on 26-11-2025 11:44
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Member Location: Posts: 292 Joined: 09.10.17 |
Hello, is it possible to get an ID for this Ephydridae? Sighted on 01.09.2018 in Germany, North Rhine-Westphalia in the garden. Body-size approximately 5 mm Greetings Bernd fatsemann attached the following image:  [35.58Kb] Edited by fatsemann on 28-11-2025 08:41 |
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| fatsemann |
Posted on 26-11-2025 11:45
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Member Location: Posts: 292 Joined: 09.10.17 |
#2
fatsemann attached the following image:  [37.43Kb] |
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| fatsemann |
Posted on 26-11-2025 11:45
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Member Location: Posts: 292 Joined: 09.10.17 |
#3
fatsemann attached the following image:  [39.47Kb] |
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| fatsemann |
Posted on 26-11-2025 11:45
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Member Location: Posts: 292 Joined: 09.10.17 |
#4
fatsemann attached the following image:  [35.56Kb] |
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| Tony Irwin |
Posted on 26-11-2025 14:06
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 Member Location: Norwich, England Posts: 7338 Joined: 19.11.04 |
I think Paracoenia fumosa.
Tony ---------- Tony Irwin |
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| fatsemann |
Posted on 26-11-2025 21:40
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Member Location: Posts: 292 Joined: 09.10.17 |
Hi Tony, that was my first opinion too. But aren't 5 mm too large for Paracoenia fumosa? |
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| Tony Irwin |
Posted on 27-11-2025 13:15
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Member Location: Norwich, England Posts: 7338 Joined: 19.11.04 |
P. beckeri is said to be slightly larger than fumosa, but the distinction ("approximately 5mm" vs. "usually less than 4mm" ) is marginal. The colour of the dorsum is more reliable, I think. (beckeri - grayish blue to light brown, dull; fumosa - darker, bluish-olive green to greenish-gray; subshining dorsally)
Edited by Tony Irwin on 27-11-2025 13:15 Tony ---------- Tony Irwin |
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| fatsemann |
Posted on 28-11-2025 08:41
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Member Location: Posts: 292 Joined: 09.10.17 |
I think you're right, but I don't see a difference of about 1 mm in body size as marginal. That's 20% or 25%. However, I have no idea how large the variation in size can be. Thank you for your help. Greetings Bernd |
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| Tony Irwin |
Posted on 28-11-2025 18:06
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Member Location: Norwich, England Posts: 7338 Joined: 19.11.04 |
When measuring body size, it's important to consider what specimens have been measured previously. Dried, pinned specimens will (usually) have abdomens that are shorter than fresh specimens or those in alcohol. In the end, if you're not sure, dissect a male - that (usually) gives a clear result!
Tony ---------- Tony Irwin |
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