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Geologic Time Line Organisms. Precambrian Time Before 570 mybp. Bacteria Algae Worms?. Paleozoic Era 570-225 Million Years Before Present Common Organisms. Jellyfish Sponges Corals Worms Crinoids Brachiopods Trilobites. Corals. Trilobites. More Trilobites. Crinoids. Brachiopods.

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paleozoic era 570 225 million years before present common organisms
Paleozoic Era570-225 Million Years Before PresentCommon Organisms
  • Jellyfish
  • Sponges
  • Corals
  • Worms
  • Crinoids
  • Brachiopods
  • Trilobites
mesozoic era age of dinosaurs 225 65 million years before present common organisms
Mesozoic Era – Age of Dinosaurs225-65 Million Years Before PresentCommon Organisms
  • Ammonites – Dominated the Mesozoic seas
  • Dinosaurs – Dominated the Land
  • Archaeopterix– First bird
australopithecus afarensis 3 85 2 95 million years ago
Australopithecus afarensis3.85-2.95 million years ago
  • Australopithecus afarensis is an extinct hominid that lived between 3.85 and 2.95 million years ago.[1]A. afarensis was slenderly built, like the younger Australopithecus africanus. It is thought that A. afarensis was more closely related to the genus Homo (which includes the modern human species Homo sapiens), whether as a direct ancestor or a close relative of an unknown ancestor, than any other known primate from the same time.
  • The most famous fossil is the partial skeleton named Lucy (3.2 million years old) found by Donald Johanson and colleagues.