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 Cerambycidae Cerambycinae
 Clytini
 Tanzania: Carinoclytus semiruber
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Pierre
Member Rosenbergia

Switzerland
1746 Posts

Posted - 01/03/2010 :  21:29:26  Show Profile  Email Poster  Reply with Quote


Clytini from Tanzania.
Their colouration remember our European Clerus!
9 to 11 mm

Francesco
Forum Admin

Luxembourg
9420 Posts

Posted - 03/03/2010 :  10:21:01  Show Profile  Email Poster  Visit Francesco's Homepage  Reply with Quote
This species has the same pattern and distribution of Chlorophorus deterrens (Pascoe, 1862), but it does not seem to belong to the same genus.
Could you check if the forehead is carinate or smooth?
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Pierre
Member Rosenbergia

Switzerland
1746 Posts

Posted - 03/03/2010 :  18:55:35  Show Profile  Email Poster  Reply with Quote
The entire head is densely punctate and covered with white erect setae (such as the whole body of this beetle). One fine smooth carina runs from the neck until the labrum and separates the head entirely. Each side shows 2 other carinae next to the eyes: one, longer on the facies and a second, shorter, up to the antennal insertions.
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Francesco
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Luxembourg
9420 Posts

Posted - 05/03/2010 :  09:10:20  Show Profile  Email Poster  Visit Francesco's Homepage  Reply with Quote
By basing of your description, I guess it might be a Carinoclytus-species.
Unfortunately, I do not have full descriptions of this genus.
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Pierre
Member Rosenbergia

Switzerland
1746 Posts

Posted - 05/03/2010 :  21:21:22  Show Profile  Email Poster  Reply with Quote
I have the feeling that African Clytini are very little known and only a few literature exists.
It's good to have at least an indication concerning the genus.
Thank you!
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Francesco
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Luxembourg
9420 Posts

Posted - 06/03/2010 :  12:15:28  Show Profile  Email Poster  Visit Francesco's Homepage  Reply with Quote
Yes: unfortunately, the few papers often also have no pictures, though the number of genera and species is very small.
That is why the majority of Clytini has diurnal phenology, a behaviour little advisable in Tropical regions due to climatic reasons. Correspondingly, in these regions some genera (e.g. Xylotrechus, Neoclytus) has a nocturnal phenology, a fact explaining their dark aspect, sometimes completely missing of light pattern.
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Francesco
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Luxembourg
9420 Posts

Posted - 02/02/2011 :  14:52:33  Show Profile  Email Poster  Visit Francesco's Homepage  Reply with Quote

Xylotrechus Reichenowi Quedenfeldt, 1883, Tab. 1, Fig. 4

Finally, I have found the original description (here p. 335) of Carinoclytus semiruber (Quedenfeldt, 1882) and the original drawing of Xylotrechus reichenowi Quedenfeldt, 1883 (here p. 137), which Adlbauer recognised as a synonym of semiruber.
This latter species has the pronotum black instead of red, but the elytral pattern seems to correspond to your specimens...
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Francesco
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Luxembourg
9420 Posts

Posted - 14/05/2015 :  21:49:33  Show Profile  Email Poster  Visit Francesco's Homepage  Reply with Quote
En revenant à ce topic, je pense que ton espèce soit en effet Carinoclytus thomsoni (Harold, 1880), qui diffère de semiruber (= reichenowi) pour son dessin jaune. La description est dans la même page de celle de C. semiruber (mentionnée ici-dessus).
L'espèce, connue du Kenya, pourrait etre nouvelle pour la Tanzanie.
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Carlo
Member Rosenbergia

Italy
1138 Posts

Posted - 14/05/2015 :  22:05:22  Show Profile  Email Poster  Reply with Quote
Giusto per vivacizzare un po'


255.75 KB
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Pierre
Member Rosenbergia

Switzerland
1746 Posts

Posted - 14/05/2015 :  22:46:24  Show Profile  Email Poster  Reply with Quote
Euh... j'ai donc bien compris, avec tous ces changements on en est donc à semiruber?
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Francesco
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Luxembourg
9420 Posts

Posted - 15/05/2015 :  06:44:29  Show Profile  Email Poster  Visit Francesco's Homepage  Reply with Quote
Bof... on lit l’allemand tout le deux Pierre.
Selon Aurivillius (p. 336), thomsoni a l’écusson couvert de pubescence blanche, les élytres de pubescence noire et les bandes jaunes (donc la "postérieure" est rhomboïdale ... mais ici je ne comprend pas si on parle de l'apicale ou de la postmédiane).
Ensuite on parle de la carène (?) frontale, mais là, je n’arrive pas à voir.
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Pierre
Member Rosenbergia

Switzerland
1746 Posts

Posted - 15/05/2015 :  07:17:01  Show Profile  Email Poster  Reply with Quote
Bien, il faut dire que la description de Quedenfeldt est quand même très précise. Elle mentionne à la fois des caractères différentiels mais indique aussi la variabilité de semiruber tant au niveau des integuments que des bandes.
La question de la forme de la bande triangulaire (étirée en forme de triangle à la suture vers l'avant = semiruber) ou rhombodoïnale (étirement triangulaire vers l'avant et l'arrière = thomsoni) concerne logiquement la postmédiane.
Je viens de contrôler la longueur de la carène frontale, bien présente et parcourant finement le vertex.

Merci Francesco de ne pas oublier les très vieux posts comme celui-ci. Parfois je me demande comment tu fais pour te souvenir de tout ça.
Merci Carlo pour l'illustration: continue comme ça, cela nous évitera d'acheter le livre d'Adlbauer!!
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Francesco
Forum Admin

Luxembourg
9420 Posts

Posted - 15/05/2015 :  07:20:46  Show Profile  Email Poster  Visit Francesco's Homepage  Reply with Quote
quote:
Originally posted by Pierre


Merci Carlo pour l'illustration: continue comme ça, cela nous évitera d'acheter le livre d'Adlbauer!!

Adlbauer sera hyperheureux de cela
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