See also:

• Science: Earth Sciences: Paleontology: Invertebrates: Arthropods: Trilobites  (15)
• Science: Earth Sciences: Paleontology: Invertebrates: Graptolites  (47)

• Paleobiology: The Early Paleozoic - Provides information on the Cambrian explosion, the Ordovician and the Silurian.
• Paleobiology: The Late Paleozoic - Article on the Devonian, the coal swamps and glaciers of the Carboniferous, the Permian and the great Permian extinction.
• The Paleozoic - An overview of the era from the Ordovician Period to the Permian, with maps and timelines.
• The Paleozoic Era - An overview of the era from the UC Berkeley Museum of Paleontology.
• The Paleozoic Era - An illustrated geological timeline.