Trilobita sandbox

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==Fossil Record==
==Fossil Record==
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Class Trilobita left an extensive fossil record spanning the Paleozoic Era, beginning in the Lower Cambrian and extending to the Upper Permian. As the earth’s continental configuration changed markedly due to continental drift, the trilobites that had a mineralized dorsal exoskeleton left exquisitely preserved fossils. As the earth changed and cycled, continents broke apart and drifted, and sea levels rose and fell, the trilobites underwent repeated declines and radiations. The associated adaptations among the trilobites from progenitors to descendents are expressed in their complex exoskeletons and well recorded in the rock record. This record has proved valuable in the study of plate tectonics, and their huge diversity has enabled the trilobite to become an exemplar for modern cladistic analysis.
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An extensive fossil record of Class Trilobita spans the Paleozoic Era from the Lower Cambrian and to the Upper Permian. As the earth changed and cycled, continents broke apart and drifted, and sea levels rose and fell, the trilobites underwent repeated declines and radiations, all the while a detailed record in their exquisitely preserved mineralized dorsal exoskeleton. The record has been important in geology and paleontology to infer both arthropod evolution and plate tectonics. The huge and diverse fossil record has allowed the trilobites to become an exemplar for modern cladistic analysis..
==Taxonomy and Phylogeny==
==Taxonomy and Phylogeny==

Revision as of 13:11, 21 April 2007

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