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Answers:    Although life was largely confined to the sea and other areas of lasting wetness (inland lakes and rivers) there was no shortage of time in the Silurian era. It was an age BEFORE the coming of amphibians, dinosaurs, mammals and birds.

Primitive land plants such as Cooksonia appear contained by the topmost (youngest) Silurian rocks, so it is likely that the Silurian represents the start of significant life on dry land. In Australia the more complex plant (lycopod) Baragwanathia longifolia have been found, posing many unanswered question about the development of land plants. The other leading important group to develop rapidly in the Silurian be fish.

Fish were colonizing freshwater rivers and lakes from the sea, set for the eventual evolution to land based organisms. Fungi are believed to have diversified during the Silurian but these organisms not often fossilize at all. Blastoids (a type of echinoderm) appeared for the first time. Trilobites and brachiopods were very numerous.

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