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2.4" Fossil Crinoid (Stellarocrinus) Crown - Illinois
This is a Stellarocrinus bilineatus crinoid crown from the Bond Formation - LaSalle Member crinoid beds in Pontiac, Illinois. The quality of preparation on this fossil is wonderful, using skillful air-abrasion techniques under a stereo microscope to removed most of the rock.
About Crinoids
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.
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.
SPECIES
Stellarocrinus bilineatus
LOCATION
Pontiac, Illinois
FORMATION
Bond Formation - LaSalle Member
SIZE
2.4 x 2.3"
CATEGORY
SUB CATEGORY
ITEM
#352039
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