Diptera.info :: Identification queries :: Diptera (adults)
 Sapromyzosoma laevatrispina or quadricincta ?
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| GAREL Jean-Michel |
Posted on 11-10-2021 10:26
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Member Location: Posts: 252 Joined: 18.12.19 |
Hello. A copulation of Lauxaniidae was observed at home on october 8th. I have some doubt about the identification since 2 pairs of black spots are seen for the female but no for the male. For the second picture male head on the left and female head on the right . Is it always leavatrispina for 3 pairs of black spots ? and always quadricincta for 1 pair of black spots ? When 2 pairs of black spots are seen what is the species, moreover, in this case If a smaller pair of spots can be observed what is the conclusion ? For the present observation a sexual dimorphism or a copulation between 2 closely related species cannot be excluded ; this is my hypothesis , but I am not sure that it is correct. All my thanks for your response.  Jean-Michel GAREL : France : Brannay : 89150 : 08/10/2021 Altitude : NR - Taille : 6 pour le mâle (estimé) Réf. : 293124  Jean-Michel GAREL : France : Brannay : 89150 : 08/10/2021 Altitude : NR - Taille : 6 pour le mâle (estimé) Réf. : 293125 Edited by GAREL Jean-Michel on 12-10-2021 05:54 |
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| Paul Beuk |
Posted on 14-10-2021 07:22
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 Super Administrator Location: Netherlands Posts: 19403 Joined: 11.05.04 |
S. laevatrispina mostly three paitrs of spots, two pairs are not unfrequent; S. quadrixcincta either one pair or two pairs. Specimens with two pairs of spots cannot be ID-ed without a look at the genitalia.
Paul - - - - Paul Beuk on https://diptera.info |
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| GAREL Jean-Michel |
Posted on 14-10-2021 08:13
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Member Location: Posts: 252 Joined: 18.12.19 |
Many thanks Paul. Best wishes, Jean-Michel Garel |
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