Paleozoic

The Palaeozoic was an era in Earth's history. It is the era of 'old/ancient life'.

The Paleozoic (or Palaeozoic) Era (from the Greek palaios (παλαιός), "old" and zoe (ζωή), "life", meaning "ancient life") is the earliest of three geologic eras of the Phanerozoic Eon. It is the longest of the Phanerozoic eras, lasting from 541 to 251.902 million years ago, and is subdivided into six geologic periods (from oldest to youngest): the Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian. The Paleozoic comes after the Neoproterozoic Era of the Proterozoic Eon and is followed by the Mesozoic Era.

Creatures

 * Giant Scorpion
 * Giant Millipede
 * Devonian Slime Shooter
 * Ammonite
 * Arthropleura
 * Meganeura
 * Gorgonopsid
 * Scutosaurus
 * Coelurosauravus
 * Dimetrodon
 * Diictodon
 * Edaphosaurus
 * Therocephalian
 * Labyrinthodont