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Page established 3-11-98, updated 3-13-98
-- copyright Jim Davison
C, Leipers Shale
in Nashville, Tennessee, USA, from Upper Ordovician deposits.
Estimated Age: about 450 million years old
Dimensions: scale bar is .5 mm
Comments: asymmetric element. Short
bar has two interestingly different denticles. The worn medial denticle
has an unusual beveled edge, and the adjacent lateral denticle is
unusually sharp, suggesting no wear. Does this suggest that wear
was unevenly distributed over an otherwise efficient jaw mechanism?
Perhaps the occluding element was missing a denticle.
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