RE: Ankylosauromorpha page

["R. Irmis" <rbi@dana.ucc.nau.edu>]

Recently on the Vertpaleo list, Carpenter mentioned that the analysis here
was done a few years ago, and would change quite a few things now.
Hopefully this includes his definitions of taxa.

Regards,
Randall Irmis

-----Original Message-----
From: owner-dinosaur@usc.edu [mailto:owner-dinosaur@usc.edu]On Behalf Of
T. Mike Keesey
Sent: Saturday, January 19, 2002 9:32 PM
To: Mickey_Mortimer11
Cc: -Dinosaur Mailing List-
Subject: Re: Ankylosauromorpha page


On Sat, 19 Jan 2002, Mickey_Mortimer11 wrote:

> *insane laughter* Why?  Why must he have such horrible definitions?

Fortunately, some seem to have been published earlier.

In _Encyclopedia of Dinosaurs_ (ed. Currie & Padian, 1997), from
Carpenter's chapter on _Ankylosauria_, page 16:
"Ankylosauria may be defined as all thyreophoran ornithischians closer to
_Ankylosaurus_ than to _Stegosaurus_."

BUT, the chapter uses typological definitions for Nodosauridae and
Ankylosauridae (based on presence of tail club -- meaning a paraphyletic
Nodosauridae, including _Polacanthus_).

AND, Padian's chapter on "Phylogeny of Dinosaurs" says that Sereno, 1986
defined _Ankylosauria_, _Stegosauria_, _Ankylosauridae_ and _Nodosauridae_
as node-based clades. Is that right? I don't have the paper -- what are
the definitions? I agree with Mickey that stem-based definitions seem to
make mro sense.

> Isn't the _obvious_ phylogenetic taxonomy for Ankylosauria-
> Ankylosauria- everything closer to Ankylosaurus than Stegosaurus
> Nodosauridae- everything closer to Nodosaurus than Ankylosaurus and
> Polacanthus
> Polacanthidae- everything closer to Polacanthus than Nodosaurus and
> Ankylosaurus
> Ankylosauridae- everything closer to Ankylosaurus than Nodosaurus and
> Polacanthus
> What would have been so hard about that?
> * end rant *

I like this. Would also add _Ankylosauroidea_ as Clade(_Ankylosaurus_ +
_Nodosaurus_ + _Polacanthus_).

Seems to me I've also seen _Ankylosauridae_ used as Clade(_Ankylosaurus_
<-- _Nodosaurus_) with _Polacanthinae_ a group therein, but mayeb I
dreamed it...

What are the Sereno 1986 definitions? Seems these are the oldest.

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