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| Date: | Fri, 3 Oct 2003 12:07:38 -0400 |
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Hyotissa hyotis is generally less strongly plicate than Lopha cristagalli, more ^^^^ than /\/\/\
Hyotissa typically has spines than can be nearly tubular.
If there is a spot where the shell is a little abraded or chipped, the interior structure of Hyotissa and most other gryphaeid oysters is spongy (try looking with a hand lens, or a close look without your glasses if you are strongly nearsighted). Standard Ostreidae do not have this texture.
Another taxon that can be confused with Lopha cristagalli is the fossil Placunanomia plicata, a cousin of the windowpane shells that are used so much in Philippine crafts.
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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