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Xavier
Scientific Collaborator
France
12017 Posts |
 Posted - 30/11/2020 : 13:20:12
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304.86 KB
Vietnam, 25 mm.
Macrochenus sp. |
Edited by - Xavier on 05/12/2020 13:37:25 |
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Xavier
Scientific Collaborator
France
12017 Posts |
Posted - 30/11/2020 : 19:04:27
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- similar to Macrochenus tonkineus v. semijunctus Pic, 1944 available here ?
- different of laotian specimen here |
Edited by - Xavier on 02/12/2020 15:09:50 |
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Xavier
Scientific Collaborator
France
12017 Posts |
Posted - 02/12/2020 : 18:54:45
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With Breuning revision, it should be Macrochenus tonkinensis Aurivillius, 1920.
" tonkineus" of Pic is a mistake, instead of "tonkinensis". |
Edited by - Xavier on 03/12/2020 07:33:58 |
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Francesco
Forum Admin
Luxembourg
9412 Posts |
Posted - 04/12/2020 : 22:42:44
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In my opinion, this is a dark form of M. isabellinus.
Cf. this specimen. |
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Xavier
Scientific Collaborator
France
12017 Posts |
Posted - 04/12/2020 : 23:34:52
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quote:
Originally posted by Francesco
In my opinion, this is a dark form of M. isabellinus.
Cf. this specimen.
I don't think so, the length of the eyes does not correspond, neither the pronotum, etc. I will add photographs to show it. |
Edited by - Xavier on 04/12/2020 23:36:14 |
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Xavier
Scientific Collaborator
France
12017 Posts |
Posted - 05/12/2020 : 13:42:44
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I changed picture to compare with this specimen from Laos, and with the specimen from MNHN. At least, mesosternum is different:
199.93 KB |
Edited by - Xavier on 05/12/2020 14:13:44 |
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Francesco
Forum Admin
Luxembourg
9412 Posts |
Posted - 05/12/2020 : 19:52:01
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Thus, it is a valid species (M. semijunctus) as Breuning wrote.
In all cases, it has nothing to do with assamensis or tonkinensis. |
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Xaurus
Member Rosenbergia
Germany
1896 Posts |
Posted - 06/12/2020 : 01:38:15
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| please compare males/females: eyes, pronotum and mesoventrite shown sexual dimorphism in Macrochenus |
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Xavier
Scientific Collaborator
France
12017 Posts |
Posted - 06/12/2020 : 08:48:39
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obviously
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Edited by - Xavier on 06/12/2020 09:05:46 |
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Xavier
Scientific Collaborator
France
12017 Posts |
Posted - 06/12/2020 : 09:59:48
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| Macrochenus semijunctus Breuning, 1960 female, without any surprise. |
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Vietnam: Macrochenus semijunctus
