Crinoid Calyx (head) Alamosaurus were up to 7 feet

were up to 7 feet (2

much can be determined about its lifestyle and adaptations

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

It was found in the late Jurassic to early Cretaceous rocks of China

Most ammonites are homomorph

Crinoid Calyx (head) Alamosaurus were up to 7 feetCrinoids 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