Crinoids, are marine animals that while motile, are bottom dwelling creatures with many feathery arms and a calcareous makeup. They are related to starfish, sea slugs and sea urchins.
More detail is available in the related link below.
A feather star is a type of marine invertebrate belonging to the class Crinoidea. It possesses feather-like arms used for capturing plankton and other small organisms in the water. Feather stars are often found attached to rocks or coral reefs in tropical and temperate oceans.
The best fossil evidence supporting the division between reptiles and birds would be transitional fossils showing a clear evolutionary pathway between the two groups. Fossils with features characteristic of both reptiles and birds, such as Archaeopteryx, provide strong support for the evolutionary link between these classes.
A crinoid may reach up to1 meter but is usually much smaller
Yes, you can find crinoid stem sections and also individual disks of the crinoid stems on the beach in Indiana and Michigan. I find them every time I go to the beach in SouthWestern Michigan.
Crinoid
The sea, they're sea lilies.
The largest crinoid fossil ever discovered is a species called Seirocrinus subangularis, which can be found in the United States, specifically in the state of Indiana.
The largest crinoid species ever discovered is the Bathycrinus carpenteri, which lived in the deep sea and could grow up to 3 meters in length.
The scientific name of sea lilies are crinoid
The mouth of the crinoid is located right next to the mouth and their digestive system is u-shaped. This is perfect in a sessile existence because, if they attach themselves to a surface, both the mouth and anus will be able to function.
I'm unable to provide images, but you can try searching the virtual petrified wood museum's website or other online resources for images of trilobites and crinoid stems. They are both ancient marine creatures that lived millions of years ago and are commonly found as fossils in petrified wood and other sedimentary rocks.
Tomasz K. Baumiller has written: 'Crinoid functional morphology and the energetics of passive suspension feeding'
i think it is considered the youngest it came after the crinoid stem and than the spirifer fossil also the neospirifer fossil than the acanthoscaphites fossil with meekoceras fossels
i think it is considered the youngest it came after the crinoid stem and than the spirifer fossil also the neospirifer fossil than the acanthoscaphites fossil with meekoceras fossels