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znort
Member Purpuricenus
China
486 Posts |
 Posted - 26/11/2011 : 17:49:20
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China: Zhejiang tian mu shan. July 2009.
For me it's not bowringi and not integra.
Maybe griseofasciata??? |
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Bi
Member Demonax
China
59 Posts |
Posted - 27/11/2011 : 09:51:42
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Dear Znort, Can you share some information about R. griseofasciata? (for I have no idea about it.)
This form of Rhytidodera was always identified as R. bowringii in the past.
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znort
Member Purpuricenus
China
486 Posts |
Posted - 28/11/2011 : 13:36:43
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I find some difference with bowringi (antennae, grayish pubescence) and the pronotum is different to integra.
I don't have griseofasciata description but Löbl reports this species from China.... It's just an idea |
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Francesco
Forum Admin
Luxembourg
9454 Posts |
Posted - 28/11/2011 : 18:52:05
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Both species are characterised by pronotum with longitudinal irregular ridges and are widespread in South China.- R. bowringi is medially smaller (25-35 mm), antennae as long as body in male, elytra with yellow pattern and grey pubescence.
- R. griseofasciata is medially larger (30-35 mm according to Plavilstshikov, but I have got a specimen of 45 mm), antennae always shorter than body, elytra with only grey pubescence.
I have got both species; in the next days I could add a picture. |
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Xavier
Scientific Collaborator
France
12211 Posts |
Posted - 28/11/2011 : 20:17:12
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Bonjour,
Voici ce que j'identifie comme Rhytidodera bowringi White, 1853 mâle. Nord Laos.
La pubescence (jaune / grise) des élytres et des antennes est un peu différente de l'exemplaire de Znort.
Je ne vois pas d'autres différences notables sur photographie (les lignes du pronotum plus divergentes ?) |
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Xavier
Scientific Collaborator
France
12211 Posts |
Posted - 28/11/2011 : 21:14:49
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Je reviens sur la description de Rhytidodera bowringi donnée par Francesco : sous la binoculaire, mes exemplaires ont bien une pubescence grise et des taches jaunes.
Mais le mâle de la photo, qui mesure 33 mm, a des antennes PLUS courtes que l'abdomen. J'ai une femelle (35 mm) de la même espèce (que je peux poster) qui a bien sûr les antennes encore plus courtes.
Ai-je bien posté une photo de R. bowringi ?? ): |
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Francesco
Forum Admin
Luxembourg
9454 Posts |
Posted - 28/11/2011 : 21:37:30
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Moi j'ai ici un mâle de bowringi et une femelle de griseofasciata, les deux de China.
I think that the antennal difference is illusory; the only difference seems to be the colour of the spots. Actually, R. griseofasciata has elytra with whitish pattern and grey pubescence.
Actually, they might be two subspecies of one one species... |
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znort
Member Purpuricenus
China
486 Posts |
Posted - 28/11/2011 : 22:34:54
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| Thank you Francesco you confirm my opinion, this one is griseofasciata, I've bowringi with yellow spots, this one have grayish/withish spots. |
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Gerard
Scientific Collaborator
France
5298 Posts |
Posted - 28/11/2011 : 22:50:16
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VIETNAM Ban Po Bai, Lai Chau 25.VI.2011
Here is Rhytidodera bowringi White, 1853, in my opinion typical form, this beast has a share wider. But it doesn't surprise me. |
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Francesco
Forum Admin
Luxembourg
9454 Posts |
Posted - 30/11/2011 : 18:25:23
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And this should be a female of Rhytidodera griseofasciata Pic, 1912
China, Guangdong, VI.2011.
Body length 45 mm. |
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Bi
Member Demonax
China
59 Posts |
Posted - 02/12/2011 : 13:58:50
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Nice discussion!
Two form or two species? It's still hard for me to make a decision.
For me, I can only say, they are not relationship of subspecies. Because I have some specimen collected in same place for both "forms", at south Yunnan.
And may be can find more proofs. But I need time to find them out from refrigerator and mount them.
Examine the genitalia for both "forms" can be considered.
And if someone has an opportunity to exam both type specimens. It would be more helpful. |
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Francesco
Forum Admin
Luxembourg
9454 Posts |
Posted - 02/12/2011 : 19:18:51
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R. griseofasciata might be - theoretically - a peculiar form evolved in Southern China (Yunnan or Hainan), which has a partially superposed areal with bowringi.
Nonetheless, if we did not find intermediate forms (due to hybridisation), they must be considered as two true species. |
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znort
Member Purpuricenus
China
486 Posts |
Posted - 04/12/2011 : 20:37:23
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| my specimen come from Zhejiang very far from Yunnan and Hainan.... |
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Topic |
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Rhytidodera griseofasciata vs. bowringi
