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Help ID Sapromyza (Lauxaniidae)
Widus	#1 Posted on 11-04-2020 20:37
Member Location: Posts: 70 Joined: 12.06.10	Hi, I posted this image on "Le monde des insectes" and we reached the genus Sapromyza but we are stuck there. I still have the fly so I can look at additional features if needed. Is there a key available for this genus? Body size: 4 mm. Widus attached the following image: [226.54Kb] Edited by Widus on 11-04-2020 20:38


Widus	#2 Posted on 18-04-2020 16:43
Member Location: Posts: 70 Joined: 12.06.10	Another view. Do you see intra-alar (ia) setae here? I color-coded some of the setae for convenience. Edit: the intra-alar setae is the purple one. Christian Widmann : Suisse : Lausanne : 1010 : 31/08/2019 Altitude : 632 m - Taille : 4 mm Réf. : 256810 Edited by Widus on 13-05-2020 15:29


Widus	#3 Posted on 13-05-2020 15:26
Member Location: Posts: 70 Joined: 12.06.10	More images below (click on them to enlarge them). I came to the conclusion that this is a female Minettia suillorum (Robineau-Desvoidy, 1830). Would you agree? Of note, Martin Ebejer (Zootaxa 2019 4543 (1): 037–051) provides convincing evidence that this species is synonymous to tinctiventris, muricata, and subtinctiventris. Réf. : 256939 Réf. : 256963 Edited by Widus on 13-05-2020 15:27


Paul Beuk	#4 Posted on 14-05-2020 09:34
Super Administrator Location: Netherlands Posts: 19229 Joined: 11.05.04	I agree with M. suillorum Paul - - - - Paul Beuk on https://diptera.info


Widus	#5 Posted on 14-05-2020 10:57
Member Location: Posts: 70 Joined: 12.06.10	Thank you Paul


Widus	#6 Posted on 31-05-2020 19:48
Member Location: Posts: 70 Joined: 12.06.10	Some doubts have been raised by Swiss dipterists about the identity of this fly. Therefore, I sent it to Martin Ebejer, a world expert on Lauxaniidae. Martin has agreed that I post his comments here: "This specimen is a real enigma! It does not run through any key with any level of confidence except to suillorum and punctiventris, but clearly it is neither of these two. I cannot match it with any of the species in my collection. The terminalia are unusual as well. It would take me a long time to dissect females of several other species to see if it matches any of them, but there also I have a difficulty because it does not match any of my specimens on external features to begin with. Also, hardly any female Minettia that I do not have had the female terminalia illustrated. Is there any chance this came from outside the Palaearctic? If definitely wild caught in Switzerland, then you should (with a lot of patience, some perseverance and a little luck) find more specimens including males. I’m afraid I cannot give you an identification for this one." Of note, I collected this fly dead in my kitchen. It may have come from outside but one has also to contemplate the possibility that it came with a parcel from abroad or from a foreign good we bought.