Agaricocrinus
americanus
Family
Coelocrinidae
Geologic
Time: Lower
Mississippian, Osagean Stage (~ 345 million years ago)
Size: Agaricocrinus
crown is 35 mm long by 35 mm wide
Fossil
Site: Crawfordsville,
Indiana Crinoids
Description:
This is a well-preserved example of the Crawfordsville
crinoid
known as Agaricocrinus americanus of Family Coelocrinidae.
The Agaricocrinus is exceptionally well preserved in remarkeble
three-dimensional relief, Also note the
fine pinnulation that it needed to filter food from the water
column. Crinoids disintegrate shortly after death, making fossilization
of fine details as seen here a rare event.
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