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Re: Vote on the Definition of "Aves"

On 9/29/06, Roberto Takata <rmtakata@gmail.com> wrote:
On 9/29/06, T. Michael Keesey <keesey@gmail.com> wrote:
> - Ax 1987 (I don't have the exact wording, but it would be equivalent
> to something like, "Extant birds and everything sharing more recent
> ancestry with them than with any other extant organism." Under this
> definition, dinosaurs would be a type of avian, not vice versa.)

What happen if we eliminate crocs and akins (and turtles, tortoises
and terrapins) - Crocodylia or Loricata?

I'm not sure I understand the question. "Loricata" has been used for several groups (including crocodylians) but is now generally used for armadillos, I think. Eliminate them from what?

> - Actually, I don't know if this has been published, but I know there
> are people who think it should be apomorphy-based.

The clade stemming from the first vertebrate to evolve fligth feathers
and wings.
Benton MJ 2000 - Stems, nodes, crown clades, and rank-free lists: is
Linnaeus dead? Bio. Rev. 75: 633-48.

Ah, thanks! -- T. Michael Keesey The Dinosauricon: http://dino.lm.com Parry & Carney: http://parryandcarney.com