| Author |
 Topic  |
|
|
Gontran
Member Rosenbergia
Canada
1150 Posts |
 Posted - 27/02/2017 : 23:52:19
|
516.93 KB
This sp. identified as Planodes quaternaria Newman, from Philippines, 21 mm.
But I am not sure at all. Anybody knows that species ? |
Gontran |
|
|
Vitali
Member Rosalia
Estonia
991 Posts |
Posted - 28/02/2017 : 11:46:06
|
It is pretty probable. A photo of the holotype of Planodes quaternaria evanescnes Kriesche, 1936 is here.
|
 |
|
|
Gontran
Member Rosenbergia
Canada
1150 Posts |
Posted - 28/02/2017 : 15:32:51
|
Thank you Vitali for confirming. Having seen the type ( quaternaria evanescens), I was a little doubtful. The label mentions only Central Philippines, IV-1985. Quite vague.
Anyway I will list it as P. quaternaria Newman. Is quaternaria evanescens just a form ? |
Gontran |
|
|
|
Vitali
Member Rosalia
Estonia
991 Posts |
Posted - 28/02/2017 : 17:47:24
|
Yes, I think it is a variation.
Have a look at BioLib. There is a drawing of variation called Planodes quaternarius var. schultzei Heller, 1913, which looks even more similar to your beetle, but still this is just Planodes quaternarius. |
|
|
|
Gontran
Member Rosenbergia
Canada
1150 Posts |
Posted - 28/02/2017 : 22:46:23
|
Thank you Vitali for your information about BioLib. I appreciate.
Karl Maria Heller's drawing is nice and accurate and I am glad to find a photo of that man. |
Gontran |
|
|
|
Xaurus
Member Rosenbergia
Germany
1912 Posts |
Posted - 28/02/2017 : 23:58:02
|
| I believe both taxa schultzei and evanscens (I haven't proof the taxonomic rank, maybe of subspecifically) are different from P. quaternarius or this is a quite variable species, generally species of this genus maybe are very rare, I have no spm in my collection. |
|
|
|
Vitali
Member Rosalia
Estonia
991 Posts |
Posted - 01/03/2017 : 08:39:35
|
I have only two specimens of a species that might even be new.
Concerning the variability, I would cite a sentence written by Eduard Vives in our private communication:
"The distribution and pattern of the black spots in the elytra are very variable, is not basical caracter for the deifferents species of Planodes."
I have a feeling that decisions on a subspecies status are often subjective, if not based on geographical aspect and variability studies. I guess, you are right - it is difficult with rare species. |
Edited by - Vitali on 01/03/2017 08:40:00 |
|
|
|
Gontran
Member Rosenbergia
Canada
1150 Posts |
Posted - 01/03/2017 : 16:41:21
|
Thanks to both of you for your comments. Since I only have one specimen of quaternaria
I cannot compare or add another variation. And I have only another species of
Planodes : P. deterrens Pascoe from Borneo. Quite a different longhorn. |
Gontran |
|
|
| |
Topic |
|
Philippines, Planodes quaternaria
