Date:         Sun, 10 Jul 2011 06:51:30 -0400
Reply-To:     Conchologists List <CONCH-L@LISTSERV.UGA.EDU>
Sender:       Conchologists List <CONCH-L@LISTSERV.UGA.EDU>
From:         Marlo Krisberg <marlo@CFL.RR.COM>
Subject:      Re: Lithopoma tectum (Lightfoot,
              1786) and L. tectum americanum (Gmelin, 1791)
In-Reply-To:  <4E18D09B.50303@mindspring.com>
Content-Type: multipart/alternative;

Thanks, Harry.  I doubt more than one or two people will off specimens.  In
the end, I think we really won't know until some graduate student takes an
interest and does the DNA work.



Marlo

From: Conchologists List [mailto:CONCH-L@LISTSERV.UGA.EDU] On Behalf Of
Harry G. Lee
Sent: Saturday, July 09, 2011 6:05 PM
To: CONCH-L@LISTSERV.UGA.EDU
Subject: Re: [CONCH-L] Lithopoma tectum (Lightfoot, 1786) and L. tectum
americanum (Gmelin, 1791)



That's a lot of work, Marlo. Thanks!

I wouldn't be so quick to dismiss ecological factors affecting shell
morphology at this point. A strategized campaign to compare grass flat
populations with ones from offshore (associated with extensive coral reef
habitats) might produce interesting results. Lots of specimens may be needed
to empower the morphometrics (for which you have laid the groundwork) for
statistical testing.

Harry


On 7/9/2011 5:26 PM, Marlo Krisberg wrote:

Some time ago I posted presentations of subject shells and took the position
they were two distinct species based upon comparison of opercula.  Thanks to
the keen insight of several readers it was determined that the operculum I
had associated with the L. tectum specimen was erroneous.  Since then I have
accomplished a bit more research and have concluded that the subject species
are most probably morphs of one species; namely, Lithopoma tectum
(Lightfoot, 1786), adopting the senior name.  My review, data and rationale
are presented at:



http://z14.invisionfree.com/Conchologist_Forum/index.php?showtopic=2166



I'd like to expand my photo coverage to include more specimens of both forms
(hopefully collected from the same locale at the same time), but mostly
specimens of the form L. tectum americanum from the Bahamas, West Indies and
South America.  I'd consider purchases, but would prefer loans for a photo
session, since I try not to accumulate shells.  If you're coming to COA and
would be willing to bring some, let me know and I'll be there for them.



Comments and photo inputs welcome.



Marlo@cfl.rr.com






--
Harry G. Lee MD
4132 Ortega Forest Drive
Jacksonville, FL
USA
(904) 389 4049
shells@hglee.com
hglee2@mindspring.com

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