[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: Quo vadis, T. rex? [long]
On Tue, 6 Feb 1996, Jeffrey Martz wrote:
> For the time
> being, the only thing we can say is that birds are KNOWN to have feathers,
> and dinosaurs are not.
Good logic. This means, however, that you cannot go around saying that
feathers are an avian autapormorphy, as we know nothing about their
presence or absence in avian outgroups (with the possible exception of
In other words, you can't go around saying stuff like "Birds have
feathers and dinosaurs didn't, so birds deserve a separate class."
Pacific Lutheran University
Tacoma, WA 98447
"If you can't convince them, confuse them." -- Harry S Truman