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Max
Member Rosalia
Russia
721 Posts |
 Posted - 07/06/2011 : 18:39:18
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Hello,
I have some unknown representatives from a genus Glenea.
It is clear, that the objective of determination of these beetles on photos is very abstruse, but, maybe suddenly appearance will seem to be knowable... (sorry for my English 
Glenea sp.1
~8mm, S Vietnam, Bin` Fyok prov. |
Edited by - Xavier on 27/01/2016 10:12:37 |
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Max
Member Rosalia
Russia
721 Posts |
Posted - 07/06/2011 : 19:05:30
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Glenea sp2:
~9 mm, C Vietnam, Lam Dong prov.
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Francesco
Forum Admin
Luxembourg
9456 Posts |
Posted - 08/06/2011 : 18:16:04
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No problem, English is a service language, we are not at Oxford! .
Concerning Glenea, the problem is the enormous number of species and that Breuning inserted all varieties in his keys...
Your former species is characterised by humeral stripe and antennae with the first two segments black and the remaining ones reddish.
The only species I have found with these characters is G. tenuilineata Thomson, 1879, from Malacca, Sumatra and Borneo, a picture of which I have found here.
Unfortunately, I do not know whether similar species from Vietnam have been described... |
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Max
Member Rosalia
Russia
721 Posts |
Posted - 08/06/2011 : 21:03:17
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Thanks, really similar with pictured ones! Group of species is the same. But in my exemplar abdomen without of dense white pubescence, not like from Singapur`s individual, and naked episternes of metathorax (maybe, it is erased, but unlikely in my opinion). Great, anyhow!
Here one more Glenea, look, please
~10,5 mm, S Vietnam, Bin`Fyok prov. |
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Francesco
Forum Admin
Luxembourg
9456 Posts |
Posted - 08/06/2011 : 21:48:29
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I am also sure that it is not the same species: it is necessary to check all species from Vietnam (and Laos) described after 1956...
Concerning the second species, I need to know if the ventral side is covered with white nacre pubescence or not. |
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Max
Member Rosalia
Russia
721 Posts |
Posted - 09/06/2011 : 00:25:02
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| Yes, ventral side is all covered with dense white pubescence (nacre?... No, lustreless perhaps, white as snow) with dark small elongated spot on a lateral face of everyone sternit. |
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Francesco
Forum Admin
Luxembourg
9456 Posts |
Posted - 09/06/2011 : 08:32:52
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Well. Though the aspect is very similar to G. atricornis Pic, 1943 from Vietnam, with the keys I reach G. saperdoides from Malaysia. This why the two pronotal bands (of five) of your specimen are "on the disc" and not "at the sides of the disc".
It might be this species (though undetermined).
Nonetheless, there is a G. saperdoides vientianensis Pic, 1926 recorded from Laos and Andaman (!). I think that this subspecies should be present in Vietnam as well.
The third specimen might be a variety (or mature form) of the second one. |
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Max
Member Rosalia
Russia
721 Posts |
Posted - 09/06/2011 : 11:35:48
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Many thanks for this job for me, really!
Andaman islands & Laos - subspecies, heh! %-) About 3 sp.
I really thought it was another species, but you're right, it seems. |
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Gerard
Scientific Collaborator
France
5300 Posts |
Posted - 01/02/2015 : 22:47:42
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| Hello max the third species is Glenea dalatensis Pic, 1943 |
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Max
Member Rosalia
Russia
721 Posts |
Posted - 03/07/2015 : 21:23:31
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Thank You Gerard! Sorry, I didn't notice your message earlier. I was leaning towards G.diverselineata birmanica Breuning,1956 because I can operate only the available image of types.:)
First species is G. mathematica, I think. |
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Glenea from Vietnam
