This is a incredibly rare, 6.8" crinoid (Isocrinus) from the Keasey Formation, Mist, Oregon. This interesting specimen shows brachia (feeding Arms) and the calyx (body). It is very well preserved and the preparation is excellent. This piece came out of an old collection we recently acquired and is the only specimen I've seen available in a long time.
Comes with an acrylic display stand.
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.