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| Date: | Mon, 22 Dec 2003 15:52:34 -0500 |
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Corbicula spp. (identification is problematic; they are hybrids, confounding the issue, and two major lineages occur in the southwestern U.S.) have hinges with distinct teeth, a non-pearly shell, and strong concentric sculpture of the shell. Older shells tend to have a brown periostracum, but this might be gone from sun-baked specimens.
The only unionoid that I know of reported for southern California is Arnoldia dejecta, which is possibly extinct. It lacks hinge teeth.
Dr. David Campbell
Old Seashells
University of Alabama
Biodiversity & Systematics
Dept. Biological Sciences
Box 870345
Tuscaloosa, AL 35487-0345 USA
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That is Uncle Joe, taken in the masonic regalia of a Grand Exalted Periwinkle of the Mystic Order of Whelks-P.G. Wodehouse, Romance at Droitgate Spa
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