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The Adena culture was a Pre-Columbian Native American culture that existed from 1000 BC to 200 BC
Asterophylites)- meaning reed (also known as giant horsetail)
tiger sharks
About 260 million years ago
closely related gomphothere genus
Pentacrinus subangularis, crinoids Styracosaurus The Adena culture was aCrinoids are assigned to the phylum Echinodermata, a group of radially symmetrical marine animals, such as the starfish, sea urchins, and brittle stars. Crinoids are commonly referred to as "sea lilies". These flower like marine invertebrate animals are beautifully colored and live as solitary individuals. This species is characterized by a globular body enclosed by a small calyx, from which freely moving arms extended upward to gather food. At the