5.5" Crinoid Plate (Barycrinus, Macrocrinus) - Indiana

This is a 5.5" crinoid association from the Edwardsville Formation, Crawfordsville, Indiana, with two individual specimens present representing two distinct species. Other fossils on this plate are fragments that are not diagnostic enough to determine species. This is a natural association and neither of the specimens are composites though there is significant gap fill an repair work done to the rock.

This fossil comes with an acrylic stand.

Identification by #:

#5- Barycrinus stellatus
#69- Macrocrinus mundulus

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.

Barycrinus stellatus, Macrocrinus mundulus
Crawfordsville, Indiana
Edwardsville Formation
5.5 x 4.3"
We guarantee the authenticity of all of our
specimens. Read more about our
Authenticity Guarantee.