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Diptera.info :: Identification queries :: Diptera (adults)
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Canacidae: Pseudorhicnoessa rattii (Mauritius)
ESant
#1 Print Post
Posted on 26-06-2024 11:43
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Location: L'Aquila, Italy
Posts: 2190
Joined: 20.09.20

Hello,

I found several of these flies on the seashore in Balaclava, Mauritius, on April 21st 2024. In this case I'm not even sure of the family they may belong to. Is it possible to identify them?

Thank you in advance,
Emanuele
ESant attached the following image:


[300.54Kb]
Edited by ESant on 27-06-2024 19:54
 
ESant
#2 Print Post
Posted on 26-06-2024 11:44
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Location: L'Aquila, Italy
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Joined: 20.09.20

Photo 2:
ESant attached the following image:


[274.2Kb]
 
ESant
#3 Print Post
Posted on 26-06-2024 11:44
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Location: L'Aquila, Italy
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Photo 3:
ESant attached the following image:


[300.31Kb]
 
Nikita Vikhrev
#4 Print Post
Posted on 26-06-2024 22:37
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I think it is Tethina
Nikita Vikhrev - Zool Museum of Moscow University
 
ESant
#5 Print Post
Posted on 27-06-2024 10:45
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Location: L'Aquila, Italy
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Thank you! It does indeed look similar.
 
John Carr
#6 Print Post
Posted on 27-06-2024 14:38
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Based on the 2010 world catalog of Canacidae by Munari and Mathis (https://doi.org/1...a.2471.1.1) this should be Pseudorhicnoessa rattii. That is the only species of Tethininae recorded from Mauritius. The setulose scutellum and bristled mid tibia point to Pseudorhicnoessa instead of Tethina.

That species was described in

Munari, L. (1981b) Sul genere Pseudorhicnoessa Malloch, 1914 (Diptera Tethinidae). Società Veneziana di Scienze Naturali - Lavori, 6, 91–96.

There is a newer paper I have not seen:

Munari, Lorenzo. 2014. New Indo-Pacific species of Dasyrhicnoessa Hendel, 1934 and Pseudorhicnoessa Malloch, 1914 (Diptera: Canacidae: Tethininae). Zootaxa 3784(3) https://www.biota...a.3784.3.8
 
http://www.flickr.com/photos/31715949@N00
ESant
#7 Print Post
Posted on 27-06-2024 19:53
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Location: L'Aquila, Italy
Posts: 2190
Joined: 20.09.20

Thank you very much John! Aside from P. rattii, other Tethininae are reported from Mauritius in Munari et al. (2020) "The beach flies of the Mascarene Islands (Diptera: Canacidae: Tethininae)". Anyway, given the features you pointed out I agree with your identification.
 
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