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Re: Limb Evolution - "Old" genes

To: cmchenry@westserv.net.au
Subject: Re: Limb Evolution - "Old" genes
From: John Conway <john.a.conway@gmail.com>
Date: Thu, 24 May 2007 22:51:56 +0100
Cc: jeff@jeffhecht.com, dinosaur@usc.edu
In-reply-to: <4656040B.7010502@westserv.net.au>
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Reply-to: john.a.conway@gmail.com
Sender: owner-DINOSAUR@usc.edu

Colin McHenry wrote:

Has anyone got a definition of Living Fossil that they think works?


How about a kronophylognetic definition:

"Any species that is more closely related to a fossil organism more than 30 million years old than it is to any other living species."

Howzat? Completely arbitrary but it seems to work if you ignore the species problem.

Follow-Ups:
- Re: Limb Evolution - "Old" genes
  - From: Roberto Takata <rmtakata@gmail.com>
- Re: Limb Evolution - "Old" genes
  - From: "Richard W. Travsky" <rtravsky@uwyo.edu>

References:
- Limb Evolution - "Old" genes
  - From: Luis Azevedo Rodrigues <lmrodrigues@fc.ul.pt>
- Re: Limb Evolution - "Old" genes
  - From: Jeff Hecht <jeff@jeffhecht.com>
- Re: Limb Evolution - "Old" genes
  - From: Colin McHenry <cmchenry@westserv.net.au>

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