Raymond Cecil Moore, L. R. Laudon
Abstract
Crinoids are marine invertebrates of unsurpassed variety of form and complexity of skeletal organization. They range from Early Ordovician time to the present, but their development in kinds and numbers culminated during the Paleozoic.
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Crinoids are marine invertebrates of unsurpassed variety of form and complexity of skeletal organization. They range from Early Ordovician time to the present, but their development in kinds and numbers culminated during the Paleozoic.
Key concepts: Paleozoic, Ordovician, Paleontology, Invertebrate, Range (aeronautics), Geology, Variety (cybernetics), Marine invertebrates