Message 2004-10-0077: RE: Apomorphy-based clades; was Re: Panstems

Tue, 14 Sep 2004 12:05:03 -0500

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Date: Tue, 14 Sep 2004 12:05:03 -0500
From: [unknown]
To: "Thomas R. Holtz, Jr." <tholtz@geol.umd.edu>
Cc: David Marjanovic <david.marjanovic@gmx.at>, PML <phylocode@ouvaxa.cats.ohiou.edu>
Subject: RE: Apomorphy-based clades; was Re: Panstems

Umm... both Wolsan and I have come up with ways to name BOTH the crow=
n and the
total groups of all life without using apomorphies. My definitions ar=
e in the
Paris abstract volume. Wolsan's are arguably better.


Quoting "Thomas R. Holtz, Jr." <tholtz@geol.umd.edu>:

> But there's the issue of if  you are dealing with crown Biota, or t=
he
> panstem Biota (i.e., including the ultra primitive ancestors of liv=
ing
> things, now extinct)...
>=20
> =09=09Thomas R. Holtz, Jr.
> =09=09Vertebrate Paleontologist
> Department of Geology=09=09Director, Earth, Life & Time Program
> University of Maryland=09=09College Park Scholars
> =09Mailing Address:
> =09=09Building 237, Room 1117
> =09=09College Park, MD  20742
>=20
> http://www.geol.umd.edu/~tholtz/
> http://www.geol.umd.edu/~jmerck/eltsite
> Phone:=09301-405-4084=09Email:=09tholtz@geol.umd.edu
> Fax (Geol):  301-314-9661=09Fax (CPS-ELT): 301-405-0796
>=20
>=20
> > -----Original Message-----
> > From: David Marjanovic [mailto:david.marjanovic@gmx.at]
> > Sent: Tuesday, September 14, 2004 12:42 PM
> > To: PML
> > Subject: Re: Apomorphy-based clades; was Re: Panstems
> >
> >
> > Mike Taylor found out how to define the clade of all life without
> > mentioning
> > an apomorphy:
> >
> > > How about:
> > >
> > > "The least recent common ancestor of _T. rex_ and
> > > _E. coli_, and all its descendants"
> > >
> > > ?  :-)
> >
> > Hey cool. You've got it. :-)
> >
>=20
>=20




  

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