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Pierre
Member Rosenbergia
Switzerland
1646 Posts |
 Posted - 09/01/2011 : 21:06:33
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3 Trichoderes shown here.
The specimen on the left comes from Guatemala, the other two from Jalisco / Mexico.
I do not know the difference between the two Trichoderes species pini and rugosus. Can you help here? |
Edited by - Capitaine on 11/02/2016 15:20:56 |
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Francesco
Forum Admin
Luxembourg
9304 Posts |
Posted - 10/01/2011 : 09:28:53
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In cases like that, it is necessary to search for the original description of the last described species.
Here, Bates gives his diagnosis: "rugosus differs from pini in the elytra chestnut-reddish, shining, with cribrose and wrinkled puncturing. Antennae and legs missing" (the last ones are not a useful characters!  ).
Consequently... what do you think about? |
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Pierre
Member Rosenbergia
Switzerland
1646 Posts |
Posted - 10/01/2011 : 17:35:30
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| Well, honestly, this is exactly the kind of "definition" which I don't like to read... the specimen from Guatemala was labelled rugosus when I received it. Regarding the puncture and the general appearance of the elytra, I do not find any striking difference. The photo shows quite well the different colorations between the beetle on the left (1995) and the two on the right side (fresh captures). But besides this darker colour, nothing really differs between them. So, according to Bates and hos poor description, they could all be rugosus. |
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Francesco
Forum Admin
Luxembourg
9304 Posts |
Posted - 10/01/2011 : 19:00:37
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| mhmmm... considering the elytral puncturing of that specimens of rugosus and pini, it seems to me that your ones are more similar to pini. |
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Capitaine
Scientific Collaborator
France
1795 Posts |
Posted - 11/02/2016 : 15:20:23
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Back to this topic, I agree with Francesco on the determination.
All these specimens are T. pini (males).
T.rugosus features a strongest elytral punctuation (wormlike) close to the base and suture with a darker colouration of elytra. |
Claude |
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Guatemala/Mexico: Trichoderes pini ♂
