2.1" Burlington Formation Crinoid - Hannibal, Missouri

This nicely preserved and prepared unidentified crinoid specimen comes from the Burlington Formation near Hannibal, Missouri. The quality of preparation on this fossil is very nice - using skillful air-abrasion techniques under a stereo microscope.

Crinoids, sometimes commonly referred to as sea lilies, are animals, not plants. They are echinoderms related to starfish, sea urchins, and brittle stars. Many crinoid traits are like other members of their phylum; such traits include tube feet, radial symmetry, a water vascular system, and appendages in multiples of five (pentameral). They first appeared in the Ordovician (488 million years ago) and some species are still alive today.
DETAILS
SPECIES
Unidentified Crinoid
LOCATION
Hannibal, Missouri
FORMATION
Burlington Formation
SIZE
2.1" stem & crown on 3 x 2.4" rock
CATEGORY
SUB CATEGORY
ITEM
#94764
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