noun
a genus of trilobites that existed in the Ordovician period
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The acidaspis is an extinct genus of trilobite that lived during the Ordovician period.
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I just learned about this cool trilobite called acidaspis from the Ordovician period.
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Check out this funky acidaspis trilobite from way back in the day!
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The acidaspis trilobite reminds me of a resilient survivor from ancient times.