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 Vietnam, Dorysthenes (Lophosternus):angulicollis?

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Greg Posted - 01/02/2020 : 22:18:07

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Hi,
I need confirmation of this Dorysthenes buqueti.
Ling Cu, Ha Giang Prov., N.Vietnam.
BL - 31 mm.
Thank you in advance,
Greg
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Capitaine Posted - 12/05/2020 : 17:05:56
Ok Francesco, my point was about the number of antennomeres taken as speciation criteria. In any case, this genus is largely to be reviewed (description of some species largely based on unstable or irrelevant criteria).
Francesco Posted - 11/05/2020 : 21:12:57
You must be careful with ancient description.
Lameere, who saw the type, wrote:


Lameere, 1911: 331

Light brown (not pitch brown) ad antennomere III not spined internally.
Capitaine Posted - 11/05/2020 : 15:33:09
Be careful with the number of antennal segments, Buqueti described by Guerin-Meneville has 12! (see attached text), moreover in many cases, I could observe in angulicolis the 11th and 12th partially merged (detail noted by Fairmaire himself).


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Francesco Posted - 05/05/2020 : 21:31:59
The antennomeres are evidently 12: it should be D. angulicollis
D. buquetii (here the type) is rather different.
Greg Posted - 02/02/2020 : 16:43:14
Thank you, Claude!
Capitaine Posted - 02/02/2020 : 14:40:21
The shape of the pronotum and the ratio of the antennal segments seem to correspond well to D.buqueti.

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