[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: FYI -- Ratite ancestors and independent loss of volancy...
David Marjanovic <firstname.lastname@example.org> wrote:
> > <http://www.sciencedaily.com/releases/2010/01/100126105429.htm>
> And even more interestingly, this article contains a link
> to the paper,
> which is free!
"We propose that large size and cursoriality and
consequently loss of flight were selected for among
Early Tertiary ancestors of modern ratites in filling
parts of the ecospace vacated upon the K/T boundary
extinction of midâlarge-sized terrestrial vertebrates,
If this scenario is true, it might also explain the rise of other large-bodied,
flightless birds in the early Cenozoic. These include the dromornithids and
gastornithids (diatrymids), with both evolving independently from volant
anseriforms; and obscure taxa such as _Eremopezus_ (probably neither
palaeognath or galloanseran).