Rare, 3.4" Eretmocrinus Crinoid - Crawfordsville

 
 
 
This is a rage Eretmocrinus granuliferus crinoid from the famous crinoid beds in Crawfordsville, Indiana. It's very 3D with the long anal tube still in place. It has been prepared under microscope using air abrasives to bring out the exquisite detail. Comes with an acrylic display stand.

It is believed that crinoids from the Ramp Creek Limestone were buried in sediment from nearby deltas during storms. The resulting siltstone deposits are soft enough that fossils can be extracted in exquisite, three-dimensional relief.

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
Eretmocrinus granuliferus
LOCATION
Crawfordsville, Indiana
FORMATION
Ramp Creek Limestone
SIZE
3.4" (including anal tube) on 5.2x3.1" limestone
CATEGORY
SUB CATEGORY
ITEM
#65982
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