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Gerard
Scientific Collaborator
France
5263 Posts |
 Posted - 05/06/2017 : 14:29:00
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160.93 KB
MALAISIE, Ile de Borneo, Sabah, Trus Madi, taille 15 mm |
Edited by - Xavier on 05/06/2017 20:20:38 |
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Xavier
Scientific Collaborator
France
12059 Posts |
Posted - 05/06/2017 : 20:20:12
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| Probablement Oberea gracillima Pascoe, 1867 , décrite de Sumatra, mais pas signalée de Borneo dans la base Titan. |
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dryobius
Member Rosenbergia
USA
1885 Posts |
Posted - 06/06/2017 : 13:17:29
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Xavier, Gerard
I have over 40 different unidentified species of Oberea (or close) from Sabah. I am sure there are more because I am not the only collector who has material from there. Honestly, I have given up any attempt at trying to identify this genus until somebody assembles photographs of all the types, including dorsal and lateral views, and close-up views of the pronota. I also see what appears to be some sexual dimorphism. So I am not completely sure how many different species I have. |
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Xavier
Scientific Collaborator
France
12059 Posts |
Posted - 06/06/2017 : 17:03:18
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Hello Dan,
This group is very difficult, but we can try something...
I have O. gracillima from Laos. It is a widespread species, and I wonder if this one from Borneo could be the same. Pronotum has a lot of transversal ridges, so I am not sure it the same. |
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dryobius
Member Rosenbergia
USA
1885 Posts |
Posted - 07/06/2017 : 15:52:21
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How do know that O. gracillima is a widespread species? Is that what Breuning has written? Sometimes he may correct, but a broken watch shows the correct time twice per day.
Characters that I observe in Bornean Oberea are, of course, punctuation and its arrangement on the pronotum and elytra, and also whether the apex of the elytra is unispinose, bispinose, or truncate.
I will try to assemble some nice photographs of my specimens in the future. I also look for students who have time to revise the genus.
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Xavier
Scientific Collaborator
France
12059 Posts |
Posted - 07/06/2017 : 17:16:57
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| I wrote that Oberea gracilima Pasc. is a widespread species because it is known ( by different authors) from Sumatra, Japan, Taiwan, Laos, Burma, Vietnam, India, Korea, China... |
Edited by - Xavier on 07/06/2017 17:18:17 |
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dryobius
Member Rosenbergia
USA
1885 Posts |
Posted - 07/06/2017 : 20:32:53
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For my part, I do not believe that O. gracillima can be so widespread. I think that many people believe that if something is a close match to a description written by Pascoe or Breuning, then they have identified it correctly.
Some of the books by inexperienced taxonomists have plenty of bad information in them. I have several species from Borneo that have the same basic body shape and color as O. gracillima.
I believe that a scientist should make a very careful attempt to identify a species in a genus which has so much chaos, unless he has some authority in that group. And in all cases, he should inform others whether or not he has seen the type or is basing his decision on a published paper.
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Xavier
Scientific Collaborator
France
12059 Posts |
Posted - 07/06/2017 : 23:27:29
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| I agree, and I wait to compare my specimens from Laos to this one from Borneo; they are probably only twin species... |
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znort
Member Purpuricenus
China
481 Posts |
Posted - 10/01/2024 : 16:52:57
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| Xavier, it could be interesting to post your gracilima fron laos to compare with my specimens from Zhejiang |
Chinese Cerambycidae |
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Borneo, Oberea: gracillima ?
