Re: Limb Evolution - "Old" genes

["Richard W. Travsky" <rtravsky@uwyo.edu>]

On Thu, 24 May 2007, John Conway wrote:

> Colin McHenry wrote:
> > Has anyone got a definition of Living Fossil that they think works?
>
> How about a kronophylognetic definition:
>
> "Any species that is more closely related to a fossil organism more than 30 
> million years old than it is to any other living species."
>
> Howzat? Completely arbitrary but it seems to work if you ignore the species 
> problem.

30 million years? Would it not suffice to say "related to an extinct 
organism"? Course, that would cover, say dodos...