fossil trilobites from the early ordovician period found |
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| navigate by keyword : ancient animal arthropod barrande barrandien biology cambrian crust czech evolution exo extinct fauna fossil fossiled joachim mineral nature ocean old ordovician organism palaeozoic paleontology period prehistoric prehistory republic rock science skeleton stone trilobite |
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| Fossil of a trilobites from the early ordovician period found in Czech Republic |
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