Hi Andre:
Your welcome. Thanks for letting me know about the new one.
Can you cite where it was published?
FYI: I consider myself a bit of splitter, rather than a lumper, but try to be
pragmatic as well. As such I also subscribe to the ideology of naming clearly
defined sub-species and/or forms. Naming forms give us parameters, i.e. a
common point of reference to converse on the particular variety.
Leslie
-----Original Message-----
Thanks Leslie,
This is very helpful!
I heard that there is also a new one...
Gaza compta Simone & Cunha, 2006 from Brazil ??
Best regards,
Andre
-----Original Message-----
From: Conchologists List [mailto:[log in to unmask]]
On Behalf Of Leslie Allen
Sent: Monday, February 12, 2007 2:51 PM
To: [log in to unmask]
Subject: Gaza superba
Hello Andre:
Some nice photos and specimens.
Your photo # 1 is Gaza superba superba
Your photo # 2 is Gaza superba cubana
.. but G. cubana in the sense that it has coloration is the umbilicus.
The member of the Genus Gaza from the Western Atlantic are:
(after Clench & Aguayo, 1943)
Gaza superba superba Dall, 1881
Northern Gulf of Mexico, Greater & Lesser Antilles, Columbia,
Gaza superba cubana Clench & Aguayo, 1943 North coast of Cuba
Gaza superba olivacea Quinn, 1991
Honduras to Colombia & Guiana
Gaza fischeri Dall, 1889
Northern Cuba to the Lesser Antilles
Gaza (Callogaza) watsoni Dall, 1881
North coast of Cuba
After much study of W.A. Gaza, it is my forgone conclusion that there are
only 2 species in the Western Atlantic: G. superba & G. watsoni; with G.
Cubana, fischeri, & olivacea being nothing more than forms or subspecies at
best.
There is a tremendous amount of overlap of those varieties. It is very
reminiscent of 15 years of research I did on Calliostoma bruneum (Dall,
1981) vs. C. tejedori Clench & Aguayo, 1949; where by it has much the same
range and overlap issues, as well as variability in sculpture and other
morphological details.
Hope this has been helpful.
Leslie
-------------------------------------------------------------------
From: Andre Poremski <[log in to unmask]>
To: [log in to unmask]
Date: Mon, 12 Feb 2007 11:59:07 -0500
Subject: Gaza superba
Dear Conch-Lers
I recently received a nice lot of Gaza superba (labeled G. superba cubana)
that were dredged from the Mississippi delta in the late sixties.
I compared these specimens with one superba that I already had in my
collection that was dredged in the Gulf off Florida's west coast...they were
slightly different. The new group seemed to lack the iridescence on the
spire normally associated with superba.
Here are the pictures:
Specimen from my collection: http://www.poremski.com/images/study/gaza_1.jpg
Sample specimen from new lot:
http://www.poremski.com/images/study/gaza_2.jpg
[Both specimens are roughly the same diameter.]
Is it a periostracum that is causing the difference in appearance? Is the
difference influenced by locality? Is there any way to clean the shell
further to bring out the classic Gaza iridescence without ruining the shell?
Thanks in advance for you input.
Kind regards,
Andre Poremski
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