Hi Andrew,

I wasn't suggesting that two species could never prodice fertile hybrids,
but only that the inability to produce fertile hybrids, when present, is
certain proof of specific distinctness, since a single species incapable of
producing fertile offspring would soon be extinct.

Regards,
Paul M.


> Well, fertility of hybrids is not a test of specific distinctness. I
> believe there is a fertile mule known...
> --
> Andrew Grebneff
> 165 Evans St, Dunedin 9001, New Zealand
> <[log in to unmask]>
> Seashell, Macintosh, VW/Toyota van nut
>
>