Sorry for the expression...Should read:
To my consideration and understanding from usage in this paper, for snails
(again saying) living on the same rock (or same series of rock, like say
eocene limestone; or same-type rock), river etc it is best to use syntopic
and sympatric should be used with those living in a certain habitat (forest,
montane area) and more commonly only with reference to a
geographical unit (Mt. Dia, Blackfen Creek, Grand Canyon, ?Ithaca :))
----- Original Message -----
From: "umit" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, November 30, 2004 4:34 PM
Subject: Re: syntopic vs sympatric
> I can give an example in which both term used together being Francisco
> WELTER-SCHULTES collective paper of his PhD on Albinaria in Crete
> [WELTER-SCHULTES, F. W. (2000): Approaching the genus Albinaria in Crete
> from an evolutionary point of view (Pulmonata: Clausiliidae). -- Schriften
> zur Malakozoologie 16: 1-208. ]
>
> To my consideration and understanding from usage in this paper, for snails
> (again saying) living on the same rock (or same series of rock, like say
> eocene limestone; or same-type rock), river etc and living in a certain
> habitat (forest, montane area) and more commonly only with reference to a
> geographical unit (Mt. Dia, Blackfen Creek, Grand Canyon, ?Ithaca :))
>
> In the example of Clausiliidae (dont know if there is any intruder to
> Nearctics), there is a great deal of insular (as well as in other means
of)
> speciation many of which are argued only to be ecospecies with no
> interbreeding barriers despite the occurrence of molecular and fair
> morphological differences. This couldnt be disproved as the genitalia is
> quite even in the family, differing slightly at genus level. In such cases
i
> think whether it is syntopic or -patric does really make sense. But if the
> ecospecies thesis (they are not true species indeed) is correct, then they
> can interbreed whether sympatric or syntopic. Back to the species concept,
> two species cannot give fertile crossbreeds. Could there any exceptions,
in
> gastropods or other groups? Rather difficult question is how could it be
> tested (if there is crossbreeding) in such an animal that has two sexes
with
> potentially more-than-one way reproductive ways (Deroceras, Vallonias),
> sperm storage ability and very specific ecological needs?
>
> Any ideas?
>
> Ümit KEBAPÇI
>
>
>
> ----- Original Message -----
> From: "Andrew Grebneff" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Tuesday, November 30, 2004 12:58 PM
> Subject: Re: syntopic vs sympatric
>
>
> > >If "syntopic" means "populations ...that ... are observable in close
> > >proximity and could thus interbreed." then what is the definition
> > >of "sympatric"? I guess I should get a copy of Tursch & read it.
> >
> > Two species living together in the same habitat are sympatric. They
> > may not share the same microhabitat, but can readily meet in their
> > daily/nocturnal rounds.
> > --
> > Andrew Grebneff
> > Dunedin
> > New Zealand
> > Fossil preparator
> > <[log in to unmask]>
> > Seashell, Macintosh, VW/Toyota van nut
> >
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