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loongfah
Member Purpuricenus
Singapore
374 Posts |
 Posted - 11/03/2014 : 15:13:38
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Is this Cereopsius javanicus Breuning, 1936 or Cereopsius sexnotatus Thomson, 1865? |
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Xavier
Scientific Collaborator
France
12092 Posts |
Posted - 11/03/2014 : 17:13:39
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from BREUNING Stephan, 1944. Études sur les Lamiaires (Coleop. Cerambycidć). Douzičme tribu : Agniini Thomson.Novitates Entomologicć, 3čme supplément (107-135): 281-512, figs 158-305.
Sorry, but I discover I have not the page of the book for C.sexnotatus T. |
Edited by - Xavier on 11/03/2014 17:14:15 |
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Francesco
Forum Admin
Luxembourg
9420 Posts |
Posted - 11/03/2014 : 18:43:10
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It reminds a lot of Cereopsius helena White, 1858.
Here the original drawing:
Cereopsius helena White, 1858 Pl. LIII, Fig. 7, Borneo |
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loongfah
Member Purpuricenus
Singapore
374 Posts |
Posted - 12/03/2014 : 13:33:40
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Thanks for all your reply & help with the original description and drawing.
I have another specimen also from Singapore.
It looks closer to the C. helena illustration for its larger pre- & postmedian spots on the elytra, and the antennae annulated with white, but there are still clear differences.
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For the record, I think this one below matches very well with the description of Cereopsius sexnotatus.
Is there sexual dimorphism in this genus?
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Francesco
Forum Admin
Luxembourg
9420 Posts |
Posted - 16/03/2014 : 21:35:13
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quote:
Originally posted by loongfah
476.36 KB
By considering the distribution and the fact that the white spots has a narrow black margin, the first species should be Cereopsius whitei Thomson, 1865, a species close to helena but present in Malayan peninsula and Nias. |
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Francesco
Forum Admin
Luxembourg
9420 Posts |
Posted - 16/03/2014 : 21:42:59
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quote:
Originally posted by loongfah
507.64 KB
And this is the var. octonotatus Breuning of Cereopsius sexnotatus Thomson, 1865 |
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loongfah
Member Purpuricenus
Singapore
374 Posts |
Posted - 17/03/2014 : 14:39:06
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Thanks a lot, Francesco! How about the top picture? The white spots there seem smaller and the antennae are uniformly reddish brown? Could it be different sexes?
I was trying to find the original description of Thomson's Systema Cerambycidarum online but I only found the text proper Pages 3-540, not the appendix p. 541-578, where the description was found.
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Francesco
Forum Admin
Luxembourg
9420 Posts |
Posted - 17/03/2014 : 19:11:49
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This description is not available on the web; if you want, I could scan Breuning's description (in French).
The sexual dimorphism usually concerns the antennal length, such as in this species,
I have not got this species; thus, I do not known if the antennal colour could show any difference... |
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loongfah
Member Purpuricenus
Singapore
374 Posts |
Posted - 17/03/2014 : 23:59:47
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quote:
Originally posted by Francesco
This description is not available on the web; if you want, I could scan Breuning's description (in French).
Thanks a lot, Francesco. That will be much appreciated.  |
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Francesco
Forum Admin
Luxembourg
9420 Posts |
Posted - 18/03/2014 : 22:35:26
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Voilŕ |
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loongfah
Member Purpuricenus
Singapore
374 Posts |
Posted - 20/03/2014 : 01:40:11
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Thanks again!
The description fits very well with my female specimen except that in my specimen, the base of 3rd, 4th & 5th antenna articles have pale pubescence (not just 3rd & 4th).
My first picture at the top is smaller (17-18mm in length) than those in the description (21-22mm), and the apical marginal angle is slightly less produced; not sure if these are sexual differences since the description did not mention these.
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Singapore, Cereopsius: whitei & sexnotatus
