| T O P I C R E V I E W |
| Capitaine |
Posted - 23/02/2017 : 11:29:15
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Bonjour, quelqu'un as-t-il une idée sur l'espèce de droite du Laos sachant que le spécimen de gauche est identifié comme X. adusta (Indonésie)? |
| 7 L A T E S T R E P L I E S (Newest First) |
| dryobius |
Posted - 24/02/2017 : 13:42:39
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. |
| Xavier |
Posted - 23/02/2017 : 21:20:18
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 ? |
| dryobius |
Posted - 23/02/2017 : 20:51:54
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. |
| Capitaine |
Posted - 23/02/2017 : 16:24:48
Merci Xavier |
| Xavier |
Posted - 23/02/2017 : 14:19:03
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. |
| dryobius |
Posted - 23/02/2017 : 13:12:10
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. |
| Xavier |
Posted - 23/02/2017 : 12:52:02
Xylorhiza pilosipennis Breuning, 1943 |
