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Capitaine
Scientific Collaborator
France
1834 Posts |
 Posted - 23/02/2017 : 11:29:15
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Bonjour, quelqu'un as-t-il une idée sur l'espčce de droite du Laos sachant que le spécimen de gauche est identifié comme X. adusta (Indonésie)? |
Claude |
Edited by - Xavier on 23/02/2017 12:52:33 |
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Xavier
Scientific Collaborator
France
12062 Posts |
Posted - 23/02/2017 : 12:52:02
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| Xylorhiza pilosipennis Breuning, 1943 |
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dryobius
Member Rosenbergia
USA
1885 Posts |
Posted - 23/02/2017 : 13:12:10
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Xylorhiza adustipennis occurs over a tremendous area of SE Asia, I believe.
Is there any evidence to believe that X. pilosipennis is a good species?
The cryptic pubescence on the body does show variation from specimen to specimen. |
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Xavier
Scientific Collaborator
France
12062 Posts |
Posted - 23/02/2017 : 14:19:03
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You mean X. adusta ?
Here another specimen from laos, identical to Holotype specimen from Smithsonian:
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Hairs are very long, and I beleive it is a true species.
I have also X. adusta from Laos, no brownish grey, and not so hairy. |
Edited by - Xavier on 23/02/2017 14:19:48 |
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Capitaine
Scientific Collaborator
France
1834 Posts |
Posted - 23/02/2017 : 16:24:48
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Merci Xavier |
Claude |
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dryobius
Member Rosenbergia
USA
1885 Posts |
Posted - 23/02/2017 : 20:51:54
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The only type photo I find from USNM is X. erectepilosa Tippmann, a synonym of X. pilosipennis Breuning.
Here are 5 examples I have:
#1 from Philippines
#2 from Sabah
#3 & 4 from Sumatra
#5 from Cameron Highlands
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The darkness on the 3rd and 4th antennal segments is variable. Size is variable.
Even the brown and black markings on the elytra show some variation.
Rondon & Breuning (1970) only list X. adusta from Laos, despite Breuning having described X. pilosipennis from Laos in 1943 !!
For me, I believe the two specimens illustrated at the beginning are the same with one specimen having been discolored and rubbed.
Perhaps you can find some differences in antennae, tarsi, or something.
It is almost a certain fact that Breuning did not examine Tippmann's specimens. It may be possible that Tippmann visited Paris and brought material for Breuning to see. Breuning is also known for describing species based on very small differences.
In Breuning's 1950 Revision of Xylorhizini, he does not provide a key to separate the 3 species that exist in this genus. In fact he says that both pilosipennis and dohrni are "near" adusta. |
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Xavier
Scientific Collaborator
France
12062 Posts |
Posted - 23/02/2017 : 21:20:18
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Very interesting question.
Holotype picture I have is USNM X. erectepilosa Tippmann, a synonym of X. pilosipennis Breuning.
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Here 2 specimens from Laos, and I have never thought it could be only one species;... but it is interesting to look for differences.
Are they...a couple ? |
Edited by - Xavier on 23/02/2017 21:24:22 |
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dryobius
Member Rosenbergia
USA
1885 Posts |
Posted - 24/02/2017 : 13:42:39
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Vives and I have been working on a paper regarding Xylorhizini (mainly Borneo) for about a year or more. We are not planning on doing anything regarding Xylorhiza and its 3 species.
I don't know whether the specimens are male or female. |
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Laos, Xylorhiza: pilosipennis
