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 Thailand: Aegosoma ornaticolle ?

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Xaurus Posted - 30/05/2021 : 23:36:13

357.56 KB

from a colleague: Thailand, Chiang Mai area, 43mm
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sebastes Posted - 22/06/2021 : 15:16:48
Hello, Claude. Thanks for your opinion. I am very familiar with the habitus of fuliginosum as I have a pair of this species from Laos from the type series obtained from Alain, as well as a small series from Vietnam purchased from local traders. The pubescence of the pronotum and the structure of the elytral surface in the above specimen from Thailand, in my opinion, do not completely correspond to those in the A. ornaticolle. I have in my collection two males of exactly the same appearance from Western Yunnan (depicted below). I temporarily designated them as A. fuliginosum ssp. Of course, this assumption awaits its justification. Tomorrow morning I will leave for the expedition until August. Upon my return, I will contact you and am ready to give you some specimens of A. fuliginosum from Vietnam for study, as well as discuss the prospect of describing the subspecies from Thailand and Yunnan.

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Capitaine Posted - 16/06/2021 : 12:10:46
Hello Sergei, Aegosoma ornaticolle White gets its name from the particular arrangement of the four light hair spots at the corners of the pronotum (see attached type), which seems to be the case on your specimen despite the rubbing marks).
On the other hand, the habitus of fuligisosum is more slender with a dark grey, satin-like appearance and inconspicuous costae. Aegosoma fuliginosum is described from Laos and China but it remains possible that it will be later from Thailand and I also notice that there are few citations for ornaticolle from Thailand, to be deepened thus...

sebastes Posted - 16/06/2021 : 03:19:11
As for me, A. ornaticolle has a different pubescence of the pronotum. Can we assume that this is a subspecies of A. fuliginosum?
Capitaine Posted - 01/06/2021 : 11:27:33
Most probably a male of Aegosoma ornaticolle White, 1853.

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