“Olenellus”的意思、由来-百科全书

词条	Olenellus
释义	Olenellus trilobite genus genus of trilobites (extinct arthropods) common in but restricted to Early Cambrian rocks (540 to 520 million years ago) and thus a useful guide fossil for the Early Cambrian. Olenellus had a well-developed head, large and crescentic eyes, and a poorly developed, small tail.
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