Re: Arctometatarsalia

["Aspidel" <aspidel@wanadoo.be>]

As I'm an amateur...

What's the definition of an arctometatarsalian pes

                                  a subarctometatarsalian pes

                                  a hyperarctometatarsalian pes ?

How can I see it by looking at a skeleton?

 

Thanks in advance, friendly - Luc J. "Aspidel" BAILLY.

 

From: "Jaime A. Headden" <qilongia@yahoo.com>

>   Typically, an 
arctometatarsalian pes has an exact quality of definition
> that does not 
include the quality of the subarctomet pes (as in
> dromaeosaurs and 
oviraptorids). The hyperarctomet pes still meets all the
> criteria of the 
arctomet definition of Holtz, 1994, and thus can be as
> such made a 
sub-type. But the "true" arctomet condition is, btw, shared
> only by a 
few taxa as is based on a functional feature. This does not
> devalue the 
taxon based to include it as it's content was originally
> defined by 
inclusion of *Ornithomimus*, but not birds. This makes
> Arctometatarsalia 
the stem opposing Maniraptora.