Again on Ancylus fluviatilis:
1) the shape, texture, shine and sculpture shown are indeed like those of
this freshwater limpet;
2) I have never met any species looking like this in truly marine, shallow
habitats in the western Mediterranean;
3) definite identification depends on viewing the apex: a crater-like bowl
ornamented with many equal radial riblets;
4) surely this species has been repeatedly cited from Sardinia and other
Mediterranean islands;
5) assuming there is no label error, the shell looks quite recent; thus,
either it came from a nearby stream, or it was living on rocks where an
underwater freshwater spring spills into the sea (not a strange thing in
the area);
6) as already mentioned, fluviatilis is a species complex, yet at this
point in time it would be unwise to bet for a name applicable to this
Sardinian shell.
Eager to know what it eventually is,
Dr. Cristian R. Altaba
[log in to unmask]
Direcció General de Caça, Protecció d'Espècies i Educació Ambiental
Conselleria de Medi Ambient
Carrer de Manuel Guasp, 10
07006 Palma de Mallorca
Illes Balears (Espanya)
-----Mensaje original-----
De: Michael Hölling [SMTP:[log in to unmask]]
Enviado el: jueves 9 de marzo de2006 22:53
Para: [log in to unmask]
Asunto: AW: limpet shaped minute thing
Dear Oliver and all!
Even if your limpets turn up to be a real marine species, I can confirm
whatsoever that Ancylus does live in Sardinia. In my collection I have a
series labeled "Bach am Monte Limbara" ("Creek near Monte Limbara").
Cossignani & Cossignani in their book on Italian Land and Freshwater
Shells also give "Continental Italy, Sicily, Sardinia" as range for
Ancylus. The species is certainly not fluviatilis O. F. Müller 1774;
read the paper from Pfenninger, Staubach, Albrecht, Streit and Schwenk:
"Ecological and morphological differentiation among cryptic evolutionary
lineages in freshwater limpets of the nominal form-group Ancylus
fluviatilis (O.F. Müller, 1774)", Molecular Ecology (2003) 12,
2731-2745. I can send you a copy if you like.
BTW the brackets around the author's name in the title are wrong, as it
was O. F. Müller himself who introduced the genus a year earlier and
described the species in the combination still used today.
Greetings from Germany
Micahel
-----Ursprüngliche Nachricht-----
Von: Conchologists List [mailto:[log in to unmask]] Im Auftrag von
Olivier Caro
Gesendet: Mittwoch, 8. März 2006 17:39
An: [log in to unmask]
Betreff: Re: limpet shaped minute thing
The best news of the year !
Two persons now say it's an Ancylid.
And, sure, the pictures of Ancylus fluviatilis complex show obvious
resemblances.
GRRR. I wanted a Trimusculus!... or, at least, a seashell, a Nassarius,
something!
By the way, what a curious story : a freshwater limpet, which is found
usually in continental European rivers, has been fished off Sardinia (I
knew the beachstormed seashells, and now here is a seaflooded
rivershell). How do they jump?... I have been told there was some salt
water between Sardinia and Italy. Any idea ?
Thanks for your helps
Olivier Caro
----- Original Message -----
From: Jamie <mailto:[log in to unmask]> Smith
To: [log in to unmask]
Sent: Wednesday, March 08, 2006 5:11 PM
Subject: Re: limpet shaped minute thing
Freshwater Ancylid.
<<Archivo: ATT00010.htm>>
----------------------------------------------------------------------
[log in to unmask] - a forum for informal discussions on molluscs
To leave this list, click on the following web link:
http://listserv.uga.edu/cgi-bin/wa?SUBED1=conch-l&A=1
Type your email address and name in the appropriate box and
click leave the list.
----------------------------------------------------------------------
|
