Intro Geology : Crinoid

Jun 30th, 2015
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Crinoids were abundant in the Paleozoic era. The earliest were found in the Ordovician Period. They were found in shallows water during this time. Their phylum is from the echinoderms, the same family as starfish, sea urchins, and sand dollars. Unlike these organisms, the crinoid looks more like a plant.

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Tommy Lombardo3/5/13Intro GeologyCrinoidCrinoids were abundant in the Paleozoic era. The earliest were found in the Ordovician Period. They were found in shallows water during this time. Their phylum is from the echinoderms, the same family as starfish, sea urchins, and sand dollars. Unlike these organisms, the crinoid looks more like a plant. Sea lilies are crinoids with root like appendages that anchor them down to objects, or the surface. They get their name for their flower like appearance. Another type does not appear as much plant like, they travel with small hook like appendages, and these are called feather stars. The last of the ancient crinoids died out in the Permian Extinctions. [ CITATION Cri13 \l 1033 ]Not only are these organisms found in fossils, they are also still living today. These types however live much deeper in the ocean then their ancient relatives. Th

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