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paleechinoidea

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1. n. pl. An extinct order of sea urchins found in the Paleozoic rocks. They had more than twenty vertical rows of plates. Called also Palaeechini. Source: opted

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called extinct found order paleozoic plates rocks rows they twenty urchins vertical

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pale yellow pale-colored pale-faced pale-hued palea paleaceous Paleacrita vernata paleae palearctic paled paleface

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