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 Bornéo, Glenea: elegans?
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Robert
Member Rosenbergia

Canada
1146 Posts

Posted - 13/01/2021 :  02:37:05  Show Profile  Email Poster  Reply with Quote

130.03 KB

Bornéo, Sabah, Mont Trus madi, 23-III-2009.
16 mm.

Robert V.

Edited by - Robert on 14/01/2021 17:15:59

Xavier
Scientific Collaborator

France
11113 Posts

Posted - 13/01/2021 :  06:59:05  Show Profile  Email Poster  Reply with Quote
Glenea (Macroglenea) elegans (Olivier, 1795)?
I have never checked if it is really the same species in Laos, Philippines, Borneo, etc
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Robert
Member Rosenbergia

Canada
1146 Posts

Posted - 13/01/2021 :  20:56:36  Show Profile  Email Poster  Reply with Quote
Not sure if it is elegans. Might be something else. My specimen is more like this one, with the apical spots almost blending in with its surroundings.

Robert V.
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Bennyboymothman
Member Rosenbergia

United Kingdom
1413 Posts

Posted - 13/01/2021 :  21:25:20  Show Profile  Email Poster  Visit Bennyboymothman's Homepage  Send Bennyboymothman a Yahoo! Message  Reply with Quote
I think it's a new species, I will look into it further.
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dryobius
Member Rosenbergia

USA
1704 Posts

Posted - 14/01/2021 :  12:23:54  Show Profile  Email Poster  Reply with Quote
I believe it is just G. elegans (very common in Sabah) and frequently with white pubescence rubbed off a little, or a lot.

G. elegans has a number of synonyms and seems to be very widespread (according to TITAN). It's unlikely that it is a new species, but there could be a number of very, very similar, closely related taxa.
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Robert
Member Rosenbergia

Canada
1146 Posts

Posted - 14/01/2021 :  18:29:32  Show Profile  Email Poster  Reply with Quote
Dan, do you have individuals that have the apical white spot on elytra almost as dark as the background, and the 3 sets of spots above with a blueish tinge? Do you have intermediate specimens?

Robert V.
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Francesco
Forum Admin

Luxembourg
9034 Posts

Posted - 14/01/2021 :  21:05:57  Show Profile  Email Poster  Visit Francesco's Homepage  Reply with Quote
quote:
Originally posted by dryobius

G. elegans has a number of synonyms and seems to be very widespread (according to TITAN).

Actually, Titan quotes a number of erroneous localities (Laos, Philippines, New Guinea), where other species are present (venus and beatrix).
G. elegans should not be widespread beyond Malaysia-Borneo-Sumatra-Java.

This species is easily recognisable for its pronotum enlarged at base.
Possibly, some chromatic forms might be real subspecies or sibling species.
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dryobius
Member Rosenbergia

USA
1704 Posts

Posted - 15/01/2021 :  02:53:43  Show Profile  Email Poster  Reply with Quote
Robert..
I have 8 specimens which I'm calling elegans. Some have very little white pubescence rubbed off, while a few have apparently lost some pubescence near the elytral apex; In addition, 2 specimens have lost the pubescent white line in the middle of the pronotum.

I could have two species, but I think it is slightly more likely that I just have one species.

I doubt if my answer helps you. Good luck. Maybe someday, somebody will study this group in its entirety.
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