Trilobites are a well-known fossil group of extinct marine arthropods. These fossils can be as old as the Early Cambrian period (521 million years ago) and were survived until the Permian about 250 million years ago. The trilobites were among the most successful of all early animals, roaming the oceans for over 270 million years.
Fossil size: 0.5-1.25"
Matrix size: 1-2.5"
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