Crinoid Calyx (head) Alamosaurus along the neck and tail

along the neck and tail that may have formed a thick

and was most common in North America and South America from the Irvingtonian stage to the Rancholabrean stage of the Pleistocene epoch living 1

Fossils of Asterodermus have been found in Britain

were up to 7 feet (2

Compsognathus was a bird-like dinosaur that walked on two long

Crinoid Calyx (head) Alamosaurus along the neck and tailCrinoids are commonly known as sea lilies due to their "flower like" appearance , though they are animals, not plants. Crinoids are echinoderms related to starfish, sea urchins, and brittle stars. Like other members of their phylum they are spiny skinned, have a five sided or pentaradial symmetry as adults and a calcium carbonate endoskeleton. Although crinoids are the least understood of living echinoderms, their skeletal remains are among the most