List of the Paleozoic life of California

This list of the Paleozoic life of California contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of California and are between 538.8 and 252.17 million years of age.

Fossil of the mysterious Ediacaran organism Aspidella
Mold fossil of a shell of the Early Devonian-Late Triassic bivalve Aviculopecten
Fossil of the Cambrian trilobite Bristolia
Fossil of the Early Ordovician-Early Devonian trilobite Calymene
Fossilized shell of the Late Devonian-Permian brachiopod Composita
Fossil of the Devonian-Triassic arthropod trackway ichnogenus Cruziana
Fossilized shell of the Permian ammonoid cephalopod Cyclolobus
Fossil of the Cambrian trilobite Daguinaspis
Fossil of the Middle Ordovician graptolite Didymograptus
Fossilized shells and restored appearances of the Middle-Late Ordovician nautiloid cephalopod Endoceras
Fossilized shell of the Silurian-Permian sea snail Euomphalus
Illustration of a fossil of the Cambrian trilobite Fallotaspis
Life restoration of the Cambrian echinoderm Gogia
Life restoration of the Permian Chimaera relative Helicoprion
Fossilized shells of the Ordovician-Carboniferous sea snail Holopea
Fossil of the Middle Ordovician trilobite Illaenus
Fossil of the Middle-Late Ordovician giant trilobite Isotelus .
Illustration of a fossilized shell of the brachiopod Kutorgina
Illustration of a fossilized shell of the Cambrian-Late Ordovician brachiopod Lingulella
Fossil of the Ordovician trilobite Lonchodomas
Illustration (lower right, entry 15) of a fossilized shell in front and side views of the Silurian-Late Devonian brachiopod Meristella
Fossilized shell of the Carboniferous-Permian brachiopod Neospirifer
Fossil of the Cambrian trilobite Nevadella
Illustration of a fossil of the Cambrian trilobite Olenellus
Life restoration of the Cambrian trilobite Peachella
Fossilized shell of the Ordovician brachiopod Plaesiomys
Restoration of the Silurian trilobite Proetus
Fossil of the mysterious Ediacaran animal Pteridinium
Fossil of the arthropod burrow ichnogenus Rusophycus
Fossilized shell of the Late Ordovician-Late Triassic brachiopod Spirifer
Life restoration of the mysterious Ediacaran animal Swartpuntia
Illustration of a fossil of the Cambrian trilobite Trinodus
Fossil of the Cambrian trilobite Wanneria
Fossilized shells of the ammonoid cephalopod Xenodiscus