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Hypselocrinus & Ulrichicrinus Crinoids - Indiana
This is a beautiful crinoid association plate collected from the Edwardsville Formation near Crawfordsville, Indiana. There is a small, 3.9" (including stem) Hypselocrinus hoveyi crinoid, along with a 5.8" (including stem) Ulrichicrinus coryphaeus, associated on this plate. The quality of preparation on this fossil is exquisite - using skillful air-abrasion techniques under a stereo microscope. It 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.
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.
SPECIES
Ulrichicrinus coryphaeus & Hypselocrinus hoveyi
LOCATION
Crawfordsville, Indiana
FORMATION
Edwardsville Formation
SIZE
Hypselocrinus hoveyi 3.9" & Ulrichicrinus coryphaeus 5.8"on 7.1x6.5" limestone
CATEGORY
SUB CATEGORY
ITEM
#68752
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