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 Trachyderes Mexico: elegans elegans		  New Topic  Reply to Topic
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Pierre
Member Rosenbergia

Switzerland
1755 Posts
Posted - 29/05/2011 :  09:05:54  Show Profile  Email Poster  Reply with Quote



Collected in Mexico / Veracruz.
22/20/19mm
Edited by - Gerard on 30/01/2016 11:51:23

Francesco
Forum Admin

Luxembourg
9431 Posts
Posted - 29/05/2011 :  18:17:14  Show Profile  Email Poster  Visit Francesco's Homepage  Reply with Quote

Here it is necessary to know if the mesosternum is vertically truncated anteriorly (1) or it is armed with a pointed tubercle (2).
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Pierre
Member Rosenbergia

Switzerland
1755 Posts
Posted - 29/05/2011 :  18:28:38  Show Profile  Email Poster  Reply with Quote
Second case: all have this small tubercle.
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Francesco
Forum Admin

Luxembourg
9431 Posts
Posted - 29/05/2011 :  18:43:07  Show Profile  Email Poster  Visit Francesco's Homepage  Reply with Quote
Well: there are only two possibilities: T. politus Bates or T. elegans Dupont.
T. politus has antennae black with the last antennomeres yellow, T. elegans has antennae ringed (typical form) or completely black-brown (other subspecies).
Therefore, Trachyderes elegans elegans Dupont, 1836.
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Pierre
Member Rosenbergia

Switzerland
1755 Posts
Posted - 29/05/2011 :  19:45:13  Show Profile  Email Poster  Reply with Quote
But does this mean that the photo on Berzak's site (here) is showing an other species? It really looks different ...
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Francesco
Forum Admin

Luxembourg
9431 Posts
Posted - 29/05/2011 :  20:21:53  Show Profile  Email Poster  Visit Francesco's Homepage  Reply with Quote

No, it is a very rough photo (probably deriving from a slide) but the species is the same.
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