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The evolutionary lineage of ammonites traces back to straight-shelled nautiloids that first appeared during the Devonian period
which likely reduced the number that survived to adulthood
opaque crystals or masses within the aggregate
combined with excellent swimming ability and keen predatory instincts
3.1" Flexicalymene Trilobite Fossil Ordovician Age Tazzarine Region Morocco COA Raton The evolutionary lineage of ammonitesLocation: Tazzarine Region, Morocco Weight: 3. 9 Ounces Dimensions: 3. 1 Inches Long, 2 Inches Wide, 1. 2 Inches Thick Comes with a Certificate of Authenticity The item pictured is the one you will receive. Flexicalymene Trilobite Trilobites are a group of extinct marine arthropods that make up the class Trilobita. They are among the earliest known arthropods. The first appearance of trilobites in the fossil record marks the start of the Atdabanian
