I think Alan is right on the mark with his ID's.  The larger dead
shell does indeed appear to be Strophitus undulatus
http://www.inhs.uiuc.edu/cbd/musselmanual/page82_3.html  Without an
inside photo to see the hinge line I wouldn't bet the farm on it, but
I would be will to go a six-pack.

The second photo is of a live Corbicula fluminea or whatever we are
calling the Midwestern invasive these days.

The third group is a mix of Corbicula (top row left and the two on
the right in the bottom row)
http://www.inhs.uiuc.edu/cbd/musselmanual/page174_5.html, a Sphaeriid
(bottom left - I don't speak Sphaeriid either)
http://www.inhs.uiuc.edu/cbd/musselmanual/page172_3.html
  and an Elima (perhaps livescens).

My 2 cents

Kevin


>Date:    Wed, 12 Oct 2005 22:29:09 -0500
>From:    Michael Gangloff <[log in to unmask]>
>Subject: Re: Freshwater clam question...
>
>Doubtful that's an Anodonta (umbos above the hinge line eliminate
>that possibility).  A. suborbiculata is the only member of the genus
>in the midwest and I can say with relative certainty that its not A.
>suborbiculata.  Beyond that, its hard to say what you have there.
>I'd need to see the inside of the shell to make any kind of a call.
>Kevin Cummings would probably be the best judge since we're talking
>midwestern mussels here (you out there Kevin?).  Other pics are
>certainly Corbicula.
>
>Cheers,
>
>Mike
>
>Michael Gangloff, Ph.D.
>Invertebrate Collections Manager
>Auburn University Museum and Natural History Learning Center
>101 Cary Hall
>Auburn University, Alabama 36849
>Voice:(334)844-7345
>Cell:(334)332-1533
>Fax:(334)844-4065

>
>Date:    Thu, 13 Oct 2005 06:10:21 -0400
>From:    Alan Gettleman <[log in to unmask]>
>Subject: Re: Freshwater clam question...
>
>Bob,
>The largest dead shell is Strophitus undulatus, the rest are the Corbicula
>except for the very smallest single valve which looks like a Spaherid
>(Fingernail) clam.  I don't speak Sphaerid so don't know the actual species.
>Kingfishers are neat as they perch very regally on signposts or other higher
>poles/trees to proudly proclaim their presence.
>
>Alan Gettleman
>Merritt Island, FL
>Where it just continues to rain. . .
>
>Date:    Thu, 13 Oct 2005 17:07:50 -0500
>From:    "Dr. David Campbell" <[log in to unmask]>
>Subject: Re: Freshwater clam question...
>
>A hinge view could be helpful in pinning down whether the smallest one
>is a big sphaeriid or a small Corbicula.  It's also usful for unionids,
>but Strophitus undulatus sounds plausible.  As the type of Strophitus,
>it actually is a Strophitus, unlike S. subvexus and S.
>connasaugaensis.
>
>--
>Dr. David Campbell
>425 Scientific Collections Building
>Department of Biological Sciences
>Biodiversity and Systematics
>University of Alabama, Box 870345
Tuscaloosa AL 35487-0345  USA
--
Kevin S. Cummings
Illinois Natural History Survey
607 E. Peabody Drive
Champaign, IL 61820
[log in to unmask]
http://www.inhs.uiuc.edu/cbd/collections/mollusk.html

The Mussel Database Project
http://clade.acnatsci.org/mussel/

Join the Freshwater Mollusk Conservation Society Today!
http://ellipse.inhs.uiuc.edu/fmcs/

"When the going gets weird, the weird turn pro"
HST: 1937-2005

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