Macrocrinus
mundulus
Family
Batocrinidae
Geological
Time: Lower Mississippian Osagean Stage (345 m.y.a)
Size: Macrocrinus – 50 mm by 23 mm crown with 12 mm anal
tube showing and 17 mm of attached stem on a 110 mm by 70 mm matrix
Fossil Site:
Crawfordsville, Indiana
Crinoids
|  Description:
A fine example of the Camerate crinoid Macrocrinus mundulus (Family
Batocrinidae), which displays the elongated anal tube from the famous
Crawfordsville crinoid beds. Preservation on this specimen is remarkably
complete, down to the fine pinnules on the arms, showing that it
was buried quite rapidly, preserving it from the decomposition and
disarticulation that usually is the fate of most echinoderms.
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