Arm plates of disparid inadunates crinoids

General abundance:  Common

Reference:
Index Fossils of North America (page 142)

Viewer Comments:

Arm plates of disparid inadunates crinoids.
Disparid inadunates are monocyclic and have
non-pinnulate arms.

Crinoids are filter feeding animals that extracted food
particles that are suspended in the water column.
Crinoids are also called suspension feeders. These
plates show the ambulacrum bearing food groove
that carried nutrients to the crinoids mouth.
Dr. Roger K. Pabian

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Pennsylvanian Fossils of Missouri