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 China, Olenecamptus: subobliteratus

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znort Posted - 01/01/2013 : 15:58:10

214.55 KB

06/2012
I find this species last summer in Yunnan: "Gorges du saut du tigre" by swamping.
When this insect was fresh he was yellow.
15   L A T E S T    R E P L I E S    (Newest First)
znort Posted - 10/06/2021 : 06:03:08
Je reviens sur ce post suite à mes captures d'Olenecamptus dans le Zhejiang et le Jiangxi. Je ne pense pas que ce specimen soit Olenecamptus subobliteratus car c'est un taxon que je trouve régulièrement ici.
Selon Savio, Olenecamptus clarus a 6 taches élytrales discales plus deux humérales et le pronotum non plissé tandis que subobliteratus n'a que 4 taches (la tache apicale faisant défaut) et le pronotum non plissé.
Les deux ont les pattes de couleurs claires.
Sur une bonne dizaine de specimens trouvés ici aucun de mes subobliteratus frais n'était jaune lorsque je les ai capturé. Je pense qu'il faut chercher ailleurs.
Pour l'instant et c'est assez surprenant, je n'ai pas encore mis la main sur Olenecamptus clarus aussi bien dans le Jiangsu que le Zhejiang alors qu'il est réputé aussi commun que subobliteratus au début du 20ème siècle y compris en zone urbaine.

Pout moi, bien que je n'ai pas ces specimens sous les yeux car ils sont chez moi en France, si je suis la clé de Dillon et Dillon je pense qu'il s'agit de Olenecamptus nigromaculatus Pic, 1915 du fait de la couleur des pattes et antennes qui sont noires.
Xavier Posted - 15/03/2017 : 16:08:09
MONO Posted - 15/03/2017 : 15:59:14
Thanks, Xavier. I got it
Xavier Posted - 21/02/2017 : 07:02:48
quote:
Originally posted by Francesco

I can not judge this topic; nonetheless, I notice that Savio distinguished these forms in this way:
  • limbs red, 6 elytral points: clarus
  • limbs dark, 4 elytral points: subobliteratus.


Holotype pictures of Olenecamptus nigromaculatus Pic, 1915, a species from Tibet, show specimens with limbs reddish, 4 elytral points !...

I do not see any other difference with Znort's specimen.
Xavier Posted - 20/02/2017 : 15:35:57
Mono, when you reply to a message, just choose " reply", and no "reply with quote ".

This picture is available in "types section " of the forum.
You need to reach 50 post to see thoses pictures ...no so far
MONO Posted - 20/02/2017 : 15:12:10
Xavier, can you post the holotype of Olenecamptus nigromaculatus to me? Thanks!
Xavier Posted - 16/05/2015 : 15:35:37
In the same group species, see also holotype specimens of Olenecamptus nigromaculatus Pic, 1915 here
Sergey Posted - 18/01/2013 : 06:24:15
Olenecamptus riparius has metathoracic episterna dark brown -look at a photo and this topic


123.46 KB
Bi Posted - 14/01/2013 : 20:24:58
Dear Max,
I will try to find and photograph some. Please wait a while, The camera is not available to me now.
By the way, can you show your specimen in ventral-lateral view ?
Thank you.
Max Posted - 14/01/2013 : 15:42:23
Dear Bi, all of Russian Olenecamptus riparius has metathoracic episterna dark brown, unicolored with underside of beetle. Always. This exists beside alive beetles and beside exemplars in collection too. This does not depend on way preparation and/or mortification. This very usual and the well-known beetle, which in the whole soviet literature appeared anytime, as "clarus". Indeed, it close to O. subobliteratus. This fact was all is ignored.
Have you got any fresh O. subobliteratus with dark metathoracic episterna? This was much interesting.
Bi Posted - 13/01/2013 : 21:55:53
The new species is rather suspicious to me!
Without comparing the endophallus even if tegmens....
The colour of pubescence is unstable by different collection and preservation methods,
It's very easy to become dark, when the alive one confronted a wet environment and difficult to recover (killed by ethyl acetate)
This case is different from some other white pubescent species.

This why, only a few specimens show perfect white in both ventral and dorsal views, like the type.
Maybe killed by cyanide.

And some other diagnostic features almost be individual differences....
Max Posted - 12/01/2013 : 19:12:49
it worked like a dream!!!
Max Posted - 12/01/2013 : 19:10:38
This beetle is very similar to O. subobliteratus with dark legs, really.
I'm but to tell as subobliteratus-like similar species can inhabit not only Russia (as riparius). Chiefly in South China

In Japanese Website all right.
Moderately small O. clarus with 6 discal spots and big O. subobliteratus with 4 discal spots.

quote:
Honestly, I do not observe that sharp differences in Japanese specimens that can sustain Danilevsky's opinion....
I agree, it is prematurely. But not impossible.

Beetle from Lazo (Maritime prov. of Russia, Lazovsky district)

Francesco Posted - 12/01/2013 : 18:12:15
I can not judge this topic; nonetheless, I notice that Savio distinguished these forms in this way:
  • limbs red, 6 elytral points: clarus
  • limbs dark, 4 elytral points: subobliteratus.

Now, this Japanese Website shows
  • a beetle with 4 elytral points and red limbs... identified as subobliteratus (why not clarus? ),
  • a beetle with 8 spots and bicolor legs (identified as clarus).

Finally, this is the type of O. clarus.

Honestly, I do not observe that sharp differences in Japanese specimens that can sustain Danilevsky's opinion....
Max Posted - 12/01/2013 : 17:50:01
Good evening, friends!
If it is O. subobliteratus that this strange O. subobliteratus in my view...
O. subobliteratus is described from near Shanghai, and the known from Yunnan too. Pic's Type of O. subobliteratus has reddish-brown legs and antenna. Much possible that exists quite a few white Olenecamptus like look.

In 2001 from Maritime Prov. (Russia) was described Olenecamptus riparius Danilevsky, easy distinguished from O. subobliteratus.
O. subobliteratus has white episterna of metathorax because of dense white pubescence, while in O. riparius metathoracic episterna are dark brown because of sparse pale pubescence.
Earlier all white Russian Olenecamptus were automatically defined as "clarus".

O. clarus has no relations with this beetle, this small brightly-white bug with 6 points on elytra (not 4 like subobliteratus and riparius)
If quote M. Danilevsky : "Most probably there are several species in Japan with the name «O. clarus»."
But this is other story...

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