This Specimen has been sold.
11.6" Plate Of Crinoids (Dimerocrinus) & Graptolites - New York
This is a 11.6 x 6.8" plate of shale containing several, feathery crinoids of the genus Dimerocrinus. It comes from the Rochester Shale near Middleport, New York. It also has a couple of graptolites of the genus Dictyonema.
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.