Unknown Burlingtion Fossil
Now identified - see Viewer Comments

The following unknown Burlington Formation (Mississippian) fossil
was found in the summer of 2006 near Hannibal, Missouri.

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Steven Holley

Discussion

These are undoubtedly what we call arm trunks from which
biserial arms are attached. More than one genus (of quite distantly
related crinoids) have this type of arm in the Burlington Limestone,
so it is not possible, at least for me, to say which. My guess is that
it is either Steganocrinus or Eucladocrinus.

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