Diptera.info - Discussion Forum: small black Muscid

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small black Muscid - rather Fannia than Hydrotaea
Sundew	#1 Posted on 28-07-2022 23:43
Member Location: Berlin and Baden-Württemberg, Germany Posts: 3917 Joined: 28.07.07	Hi, On 1st July I saw this small black fly in a wetland area in southwestern Germany. I consider it a Hydrotaea (Muscidae). With the key of D'Assis Fonseca (1968) I found that there are just a few species with the combination "knob of halteres yellow" and "frontal triangle more or less dulled by dust, frontal orbits densely grey dusted throughout". The best decision should be H. albipuncta ("distinct blackish shine around front ocellus", middle tibia usually with a short anterodorsal on apical half" ). I feel very uncertain, however, and would therefore highly appreciate experts' opinion! Thanks in advance, Sundew Sundew attached the following image: [240.23Kb] Edited by Sundew on 30-07-2022 00:29


Sundew	#2 Posted on 28-07-2022 23:45
Member Location: Berlin and Baden-Württemberg, Germany Posts: 3917 Joined: 28.07.07	In the upper picture there is the short ad on T1 visible, I think. And the head detail shows the dark shiny patch around the ocelli. Sundew attached the following image: [268.38Kb]


Jan Maca	#3 Posted on 29-07-2022 07:07
Member Location: Posts: 1250 Joined: 25.03.10	The subcostal vein reminds me a Fannia.


Sundew	#4 Posted on 30-07-2022 00:22
Member Location: Berlin and Baden-Württemberg, Germany Posts: 3917 Joined: 28.07.07	Ah - "SC more proximally diverges from R1 than in Muscidae"... Somehow I don't get it, probably because of a lack of comparison. And I did not expect a Fannia to be so small, but I actually only know F. canicularis. The Fannia key leaves me perplexed, so we'll better stay with "Fannia spec.". Many thanks, Jan!


Nikita Vikhrev	#5 Posted on 01-08-2022 21:07
Member Location: Moscow, Russia Posts: 9459 Joined: 24.05.05	Yes, Fannia Nikita Vikhrev - Zool Museum of Moscow University