Brachypterous Coleoptera

Robin Leech robinl at CONNECT.AB.CA
Wed May 5 14:39:52 CDT 1999


Many insect groups, not just beetles, have variations of less than full-size
wings.  Many moths, flies and grasshoppers have brachypterous or
micropterous conditions, and some orthopteroids (such as Grylloblattoidea)
have an apterous condition.  There is of course, primary and secondary
aptery.

I believe that the terms run like this:

1.  Fully winged.
2.  Brachypterous: smaller (down to say 25-30%) than full wings, and
organism cannot fly with them.
3.  Micropterous: wee stubs left which can move, so from just visible bits
up to about 25% of a normal wing.
4.  Apterous: no external remnants of wings.

There is a subjective point where a wing is a small brachypterous or a large
micropterous.

Robin Leech

-----Original Message-----
From: Enrico Ricchiardi <alerico at INRETE.IT>
To: Multiple recipients of list TAXACOM <TAXACOM at CMSA.BERKELEY.EDU>
Date: Wednesday, May 05, 1999 11:50 AM
Subject: Brachypterous Coleoptera


>Dear all
>
>I am about to describe a new beetle (Coleoptera) whose females bears wings
>reduction, say about 60% of the males wings length. There is an widely
>accepted term to define this species. Is "Brachypterous" correct? Iread on
>some reference that Brachypterous is some species where some individuals
>only shows wings reduction.
>
>
>A second (of a different genus) species has all the known individuals of
>both sexes with the wing length about 15% of the average wing length of all
>teh species belonging to the neighborough genera. Is the term
>"brachypterous" appropiate for this species too or there is a different
>term (like micrapterous) widely accepted for Coleoptera?
>
>
>Thank you in advance for your help
>
>                Enrico Ricchiardi
>




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