"Theodoxus danubialis was once a common snail in the river systems of what
is now the
Czech Republic - but is now extinct in these same rivers. Tom"
Dear Tom, Theodoxus danubialis isīnt "now extinct in the Czech Republic". In
the former Czechoslovakia (CS) was "danubialis" in Danube rivers, first and
foremost in Slovakia (SK). Now live it in Slovakian rivers, but in the Czech
Republic (CZ) too, in Kyjovka & Dyje rivers. But boundary :-)))
Lubosh
www.kolouch.com
----- Original Message -----
From: "Thomas E. Eichhorst" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, June 10, 2003 6:44 PM
Subject: Re: Caspian Sea?
> There are two nerites listed as occuring in the Caspian Sea - or rather
the
> river deltas flowing into the sea.
>
> The first is Theodoxus pallasi Lindholm, 1924; a small, 5-7 mm shell with
> brown axial stripes on a cream base. It also occurs in the Aral and Azov
> Seas. I have specimens from the Volga River delta that are so corroded
that
> none of the pattern shows. Luckily I was able to borrow some decent
> specimens from Harry Lee for the book.
>
> The second species is Theodoxus schultzii (Grimm, 1877). It is another
> small shell, solid cream to yellow in color and seems to only be found in
> the Caspian. We were unable to obtain any specimens of this species and
had
> to rely upon the original description and illustrations by Grimm. In
fact,
> I have yet to see it pictured except as a copy of that original drawing.
It
> has an open spiral shape and looks almost like a deformed shell. So its
> status is a bit questionable.
>
> By the way, a paper by Zhadin of the Academy of Sciences of the Union of
> Soviet Socialist Republics titled Mollusks of Fresh and Brackish Waters of
> the U.S.S.R. (1952), translated in 1965, lists only these two nerite
species
> plus Planorbis eichwaldi as found in the Caspian. The area has a rich
> fossil history, but like many areas in that part of the world has suffered
> ecologically. Many of the freshwater nerites like Theodoxus danubialis
and
> Theodoxus fluviatilis that were once widespread in Eastern Europe are now
> found only in islated populations - if at all. For instance, Theodoxus
> danubialis was once a common snail in the river systems of what is now the
> Czech Republic - but is now extinct in these same rivers.
>
> In a 1997 volume by Butakov, Chuhchin, Cherkasova, & Lelekov, Gastropoda
of
> the Black Sea, they only list Hydrobia ventrosa Montagu, 1803; Caspia
> gmelini Dybowski, 1888; Clessiniola variabilis (Eichwald, 1838); and
> Micromelania caspia lincta Milachevitch, 1874 as also occuring in the
> Caspian Sea.
>
> Tom Eichhorst
>
> > -----Original Message-----
> > From: Conchologists of America List [mailto:[log in to unmask]]On
> > Behalf Of Patty Jansen
> > Sent: Monday, June 09, 2003 7:04 PM
> > To: [log in to unmask]
> > Subject: Caspian Sea?
> >
> >
> > Dear All,
> >
> > Following a sad family occasion three weeks ago, I found myself
> > in a Boeing
> > 747 flying about 10km up in the air over a completely cloudless central
> > Asian continent. As we left the snowy mountains of Afghanistan behind,
and
> > the little villages of Georgia, we flew over the Caspian Sea. I found
> > myself wondering, peering out of the window, are there any shells in
this
> > utterly desolate place? On the shores of this inland sea, I did not spot
a
> > single village, on the water, I did not see a single boat (admittedly,
it
> > must have been about 5am..). The shores and the water looked so
> > lifeless it
> > seemed like the ocean equivalent of a desert.
> >
> > Has anyone ever seen any of these shores close up, or know anything
about
> > them? Are there any shells in the Caspian Sea?
> >
> > just wondering
> >
> > Patty
> >
> >
> > Dr. Patty Jansen
> >
> > Bookshop: http://www.booksofnature.com
> > Publishing and info site: http://www.capricornica.com
> >
> > Books of Nature
> > P.O. Box 345
> > Lindfield NSW 2070
> > Australia
> >
> > phone/fax: 02 9415 8098 international: +61 2 9415 8098
> >
> > E-mail: [log in to unmask] or [log in to unmask]
>
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