9.4" Spectacular Actinocrinites Crinoid With Macrocrinus - Indiana

Spectacular Actinocrinites Crinoid With Macrocrinus - Indiana #272813

This is an absolutely stunning, 13.3" wide plate of detailed fossil crinoids from Crawfordsville, Indiana. These fossils have been microscopically prepared using air abrasives, revealing their intricate details and three dimensional preservation. The three crinoids include Actinocrinites gibsoni (9.4" long including stem), Macrocrinus mundulus (1.65" long crown), and Pachylocrinus aequalis (.7" long). All of the crinoid stems on this specimen are natural and have not been mounted into place.

Comes with a display stand.

Crinoids from the Ramp Creek Limestone were likely 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.

About Crinoids