List of the Paleozoic life of Arkansas

This list of the Paleozoic life of Arkansas contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Arkansas and are between 541 and 252.17 million years of age.

Fossils of the Carboniferous-Permian bryozoan Archimedes
Mold fossil of a shell of the Early Devonian-Late Triassic bivalve Aviculopecten
Fossil of the Cambrian-Middle Devonian trilobite Cheirurus
Fossilized shell of the Late Devonian-Permian brachiopod Composita
Life restoration of two species of the Silurian trilobite Deiphon
Fossil and mold of the Late Ordovician-Silurian trilobite Diacalymene
Fossil of the Middle Ordovician-Early Devonian trilobite Encrinurus
Fossilized calyx of the Silurian-Middle Devonian crinoid ("sea lily") Eucalyptocrinites
Fossilized shell of the Silurian-Permian sea snail Euomphalus
Fossil of the bore-hole ichnogenus Gastrochaenolites (G)
Fossil of the Silurian trilobite Glyptambon
Fossilized shell of the Carboniferous-Permian nautiloid cephalopod Metacoceras
Fossilized shell of the Early Devonian – Triassic sea snail Naticopsis
Fossilized theca of the Carboniferous blastoid echinoderm ("sea bud") Pentremites
Fossilized shell of the Silurian-Early Triassic sea snail Platyceras
Restoration of the Silurian trilobite Proetus
Fossil of the Middle Ordovician-Silurian trilobite Sphaerexochus
Fossilized shell of the Late Ordovician-Late Triassic brachiopod Spirifer
Fossil preserved in situ of a Carboniferous tree-like club moss relative with attached Stigmaria rhizome system
Fossils of the bore-hole ichnogenus Trypanites