Dizygocrinus & Hylodecrinus Crinoids - Illinois

This is a trio of crinoid fossils from the Warsaw Formation of Adams County, Illinois. The largest crinoid is 3.2" long including the stem. The crown on it has been composited onto the plate while the other two crinoids are in their natural positions. It comes with an acrylic display stand.

Most of the 3D crinoids coming out of the midwest are coming from Crawfordsville, Indiana making these Illinois specimens a little more unusual. The specimen has been prepared using air abrasives to remove the hard limestone surrounding the specimen, and reveal the very detailed calyx.

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.
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DETAILS
SPECIES
Dizygocrinus caroli & Hylodecrinus briareus
LOCATION
Adams County, Illinois
FORMATION
Warsaw Formation
SIZE
Matrix 4.5x3.5
CATEGORY
SUB CATEGORY
ITEM
#43524
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