Crinoid, Fossil, 2.5+ lbs, display specimen, #R-7169 For Sale

This listing is for a Crinoid Fossil display specimen.
Crinoids are marine invertebrates that make up the class Crinoidea. Crinoids that remain attached to the sea floor by a stalk in their adult form are commonly called sea lilies, while the unstalked forms, called feather stars or comatulids, are members of the largest crinoid order, Comatulida. Adult crinoids are characterised by having the mouth located on the upper surface. This is surrounded by feeding arms, and is linked to a U-shaped gut, with the anus being located on the oral disc near the mouth. Although the basic echinoderm pattern of fivefold symmetry can be recognised, in most crinoids the five arms are subdivided into ten or more. These have feathery pinnules and are spread wide to gather planktonic particles from the water. At some stage in their lives, most crinoids have a short stem used to attach themselves to the substrate, but many live attached only as juveniles and become free-swimming as adults.
Details:
gemstone: Crinoid Fossilcolor: green, creamdimensions: approx 6.5 × 2.5 × 2 inchesweight: 2 pounds 9.9 ounces
The measurements provided are at the widest part and are close approximations. The piece(s) shown in the pictures is what will be shipped to is what Michael from CA had to say about our fossil specimens: This is a great place to find interesting fossils. I\'ll be back. Thank you have any questions, please contact us.
Thank You
Tim & Tonya Daniels