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cerambyphil
Member Rosalia
France
675 Posts |
 Posted - 04/10/2013 : 22:53:05
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296.45 KB
Voici une espèce originale de Bornéo, proche d'Oberea mais avec une épine au début du second article antennaire, un abdomen très allongé et des antennes de 12 articles.
Inspire t-elle quelqu'un ?
22 mm. |
Edited by - cerambyphil on 05/10/2013 22:04:48 |
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Beckey
Member Rosalia
Japan
553 Posts |
Posted - 05/10/2013 : 10:51:41
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41.1 KB
I think this beetle belongs to the genus Ectinogramma, Agapanthiini.
The following specimen is my Ectinogramma isosceloides Thomson, 1864, which was collected in Peninsular Malaysia. |
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Francesco
Forum Admin
Luxembourg
9551 Posts |
Posted - 05/10/2013 : 11:08:29
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The pedicle seems to be a bit different...
Phil, j'ai tourné ton image, car le programme a de problèmes quand les images sont trop petites en hauteur (il réduit automatiquement seulement une dimension et j'ai choisi l'hauteur).
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cerambyphil
Member Rosalia
France
675 Posts |
Posted - 05/10/2013 : 15:05:29
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Merci Beckey pour cette identification rapide. Je ne connaissais pas ce genre monospécifique. 
L'épine sur le second article antennaire est peut-être propre à la sous-population de Bornée ou peut-être est-ce simplement une variation intra-spécifique ou encore une différence sexuelle . |
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Beckey
Member Rosalia
Japan
553 Posts |
Posted - 05/10/2013 : 17:30:57
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I have only this.
So, I hesitate to say yours is E. isosceloides.
We can find some differences such as the spine of the pedicle is indistinct or distinct, the scutellum and the vertex between antennal insertion are covered with pubescence or not, the lateral apex of elytra is rather linear or rounded. |
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Francesco
Forum Admin
Luxembourg
9551 Posts |
Posted - 05/10/2013 : 17:36:15
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61.34 KB
Ceci est Ectinogramma collare Pascoe, 1866 de Penang, synonyme (?) de isosceloides de "Malaisie".
Pas d'épine...
Selon la description (ici, p. 266) elle diffère pour la tête noire (collare) au lieu que rouge (isosceloides). |
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dryobius
Member Rosenbergia
USA
1889 Posts |
Posted - 17/03/2018 : 13:46:59
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After obtaining numerous examples of this species (apparently just one species), it appears that the spine on the 2nd antennomere is a sexual feature, but I must wait for a dissection to be sure. Furthermore, the suture of the elytra is sometimes lightly colored.
The genus Spinogramma Breuning, 1947 is undoubtedly a synonym of Ectinogramma Thomson, 1864.
And it may be possible that both S. ochreovittata and S. ruficollis are synonyms of E. isosceloides.
This species appears to be widely distributed in Borneo and could easily occur in Sumatra and West Malaysia, from where Spinogramma was described from. I have seen a photo of the holotype of S. ruficollis as well, and I can see no differences.
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Francesco
Forum Admin
Luxembourg
9551 Posts |
Posted - 13/07/2025 : 18:46:41
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| These synonymies and observations have been published in this paper. |
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Indonesie: Ectinogramma isosceloides
