Paleozoic Era Ordovician Period

• Copy everything on this slide• 488-444 mya• Diversification of marine organisms of Paleozoic

fauna• End-Ordovician extinction• Deep-water faunas, especially graptolites are

common, colonial marine organisms• Appearance of conodonts, marine fish-like predators• Development of coral reefs• Plants evolved onto land• First major Paleozoic ice age.

Colonial Organisms that looked like graphite hieroglyphs of the

Egyptians

Graptolites

Nautilus

Conodonts- marine predators

Lamprey Fish

Hag fish

Blue-green Algae