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Pycnodonte mutabilis
Images: 
By I_gotta_rock
Taxonomy
Oyster
Kingdom: Animalia
Phylum: Mollusca
Class: Bivalva
Order: Ostreoida
Family: Gryphaeidae
Genus: Pycnodonte
Species: Pycnodonte mutabilis
Author Citation Morton, 1828
Geological Time Scale
Eon: Phanerozoic
Era: Cenozoic
Period: Cretaceous
Sub Period: None
Epoch: Late
Stratigraphy
Mount Laurel Formation
Provenance
Collector: Heather Siple
Date Collected: 12/31/1969
Acquired by: Field Collection
Dimensions
Width: 2 "
Thickness: .5 "
Diameter: 14 "
Location
C & D Canal - Reedy Point North
New Castle
Delaware
United States
Comments
This species is one of the most common finds at this location. This particular specimen is actually two individuals. One grew on another. The "stand" for the upright shells is the flat half of another Pycnodonte. These were found in living state in loose sand with mud holding the two pieces of the intact animal together.
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