[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: Paradoxically temporal



George, et al:

    This definition for speciation fits best, considering all the problems
with other definitions:  E.g. Ability to mate - Tigers and Lions are
separate and distinct species, yet they can mate, and their offspring
(Ligers, and Tigons) occasionally can sucessfully mate as well.  (By
sucessful I mean resultant offspring).

    We cannot rely upon external decorations except in considering existing
species - and even these can mate successfully (see above).

    Allan Edels


-----Original Message-----
From: Dinogeorge@aol.com <Dinogeorge@aol.com>
To: th81@umail.umd.edu <th81@umail.umd.edu>; jpoling@dinosauria.com
<jpoling@dinosauria.com>
Cc: dinosaur@usc.edu <dinosaur@usc.edu>
Date: Friday, July 24, 1998 3:04 AM
Subject: Re: Paradoxically temporal


SNIP>>

>The time to declare that a new species has arrived is when a well-defined
>evolutionary novelty appears in a population, even if (as is generally the
>case) there is no associated cladogenetic split. Since all we have is
>hindsight, morphology, and the fossil record for paleo-species, this is the
>best we can do, as far as drawing lines between species goes.
>