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The land areas were covered by forests of conifers
So much for that theory
Charnia masoni and Charnia wardi
Pikaia is not a technically considered a vertebrate - no you can say if this particular creature is our direct predecessor
Terataspis grandis (giant trilobite) (Replica) Deinonychus The land areas were coveredAge: Middle Devonian Location: Erie County, New York Formation: Williamsville Quarry, Onadaga Limestone This species of trilobite has been known by Paleontologists and collectors alike for many years. There has never been a complete specimen found. However many segments of this trilobite have been found and based on those fossils a reconstruction as you see here has been done by Mr. George Rennie of Ct. under the guidance and research by Dr. Copeland
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