Re: Ref for biological species and genus

["T. Michael Keesey" <keesey@gmail.com>]

I've seen it referenced to:

Mayr, E. 1963. Animal Species and Evolution. Belknap Press. Cambridge,
Massachusetts. 797 pp.

...page 19, specifically--but I don't have the volume myself to check.

Dunno about "biological genus".

On 7/9/05, Mike Taylor <mike@miketaylor.org.uk> wrote:
> Sorry for the ignorant question.  I am looking for the definitive
> reference for the the biological species concept (a population capable
> of interbreeding to produce fertile offspring).  I understand that
> this notion has been extended to define a "biological genus" as a
> population capable of interbreeding to produce live offspring that may
> not be capable of reproducing further -- is there a reference for
> this, too?  Many thanks.
> 
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--Mike Keesey