[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: Arctometatarsalia



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.