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the crest likely served as a visual signaling structure
Trilobites were the first animals to develop a hard exoskeleton
The name Spinosaurus
its dominance was likely moderated by the presence of other large marine carnivores
2.7" Polished Hexagonaria Coral Fossil Devonian Age 350 Million Yrs Old Morocco Tethydraco the crest likely served asLocation: Assa Zag Region, Morocco Weight: 3. 5 Ounces Dimensions: 2. 7 Inches Long, 2. 3 Inches Wide, 1. 1 Inches Thick The item pictured is the one you will receive. Devonian Age, 350 million years old Hexagonaria coral fossils are among the most visually distinctive fossil corals available to collectors. Formed during the Devonian Period, these ancient corals developed tightly interlocking, hexagonal skeletal cups that create natural flower like