5.6" Crinoid Plate (Macrocrinus & Hypselocrinus) - Crawfordsville

This is a spectacular crinoid association from the Edwardsville Formation near Crawfordsville, Indiana, with three individual specimens present, of which two are different species. All are preserved 3D and have been prepared with air abrasives. There is a repaired crack running through the rock and one of the macrocrinus crowns.

Comes with an acrylic display stand.

Identification by #:

#32 - Hypselocrinus hoveyi
#69 - Macrocrinus mundulus (2)

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.

Macrocrinus mundulus & Hypselocrinus hoveyi
Crawfordsville, Indiana
Edwardsville Formation
Rock 5.6 x 3.9"
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