Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!uakari.primate.wisc.edu!ames!uhccux!davidh
From: davidh@uhccux.uhcc.hawaii.edu (David Helweg)
Newsgroups: sci.bio
Subject: Re: What distinguishes a species?
Summary: Physical inability to mate versus repro. isolation.
Message-ID: <6470@uhccux.uhcc.hawaii.edu>
Date: 3 Feb 90 01:21:17 GMT
References: <22448@siemens.siemens.com> <202@53iss6.Waterloo.NCR.COM>
Reply-To: davidh@uhccux.UUCP (David Helweg)
Distribution: usa
Organization: University of Hawaii
Lines: 13

In article <202@53iss6.Waterloo.NCR.COM> howard@53iss6.Waterloo.NCR.COM (Howard Steel) writes:
>In article <22448@siemens.siemens.com> samaddar@demon.UUCP (Sumitro Samaddar)
>writes:
>
>>Are all dogs in the same species?
>
>NO. The main problem is usually physical disparity. When's the last time you
>saw a St. Bernard - Chihuahua cross?

No, I have never seen a St. Bernard - Chihuahua cross. Fortunately, this has
little to do with question. All dogs belong to the same species, Canus 
familiarus, for the taxonomists. This physical disparity might be overcome with
a little grant money and a stepping stool.