List of the Paleozoic life of Missouri

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

There is no Permian age rocks on the surface in Missouri, so beware of any fossils identified as such in the state.

Fossilized fronds of the Carboniferous-Early Cretaceous seed fern Alethopteris

Fossil of the Carboniferous horsetail relative Annularia

Restoration of the Late Ordovician nautiloid cephalopod Aphetoceras being preyed upon by a Cameroceras

Mold fossil of a shell of the Early Devonian-Late Triassic bivalve Aviculopecten

Fossilized shell of the Silurian-Early Triassic mollusc Bellerophon

Life restoration of the Early Ordovician-Silurian trilobite Bumastus

Fossilized stems from the Carboniferous-Permian horsetail relative Calamites

Fossilized elements of the Carboniferous conodont Cavusgnathus

Fossil of the Middle-Late Ordovician trilobite Ceraurus

Fossilized shell of the Middle Devonian-Permian brachiopod Cleiothyridina

Fossilized shell of the Late Devonian-Permian brachiopod Composita

Fossil of the Middle Ordovician-Carboniferous horn coral Cornulites

Fossilized foliage from the Carboniferous seed fern Cyclopteris

Restoration of the Cambrian-Middle Devonian nautiloid cephalopod Cyrtoceras

Fossil of the Late Ordovician-Middle Devonian trilobite Dalmanites

Illustration of the jaws of Dinichthys

Fossilized leaves of the Carboniferous-Permian gymnosperm Dorycordaites

Fossil of the Early-Middle Ordovician cystoid echinoderm Echinosphaerites

Fossilized shell of the Silurian-Permian sea snail Euomphalus

Life restoration of the Permian Chimaera relative Fadenia

Front (left) and right side (right) views of an enrolled fossil of the Middle Ordovician-Silurian trilobite Flexicalymene

Fossilized shell of the Carboniferous-Eocene bivalve Gervillia

Fossil of the Ordovician-Silurian tabulate coral Halysites

Fossilized shells of the Ordovician-Carboniferous sea snail Holopea

Fossilized shells of the Cambrian-Permian brachiopod relative Hyolitha

Fossil of the Middle-Late Ordovician giant trilobite Isotelus .

Fossil of the Cambrian trilobite Kendallina

Shell of the Cambrian-modern brachiopod Lingula

Fossilized plates of the Cambrian-Early Ordovician chiton Matthevia

Fossilized shell of the Carboniferous-Permian nautiloid cephalopod Metacoceras

Fossilized shell of the Early Devonian – Triassic sea snail Naticopsis

Fossilized shell of the Carboniferous-Permian brachiopod Neospirifer

Fossilized frond of the Carboniferous seed fern Neuropteris

Interior of a fossilized shell of the Early Ordovician-modern marine bivalve Nucula

Restoration of the Carboniferous-Permian cartilaginous fish Orodus

Fossil of the Cambrian trilobite Orygmaspis

Fossilized skeleton of the Permian bony fish Palaeoniscum

Fossils of the Late Devonian-Permian fern-like fronds Pecopteris

Light micrograph of a Pinnularia alga

Fossilized shell of the Silurian-Early Triassic sea snail Platyceras

Fossil of the Late Ordovician cystoid echinoderm Pleurocystites

Restoration of the Silurian trilobite Proetus

Fossil seed fern leaves from the Late Carboniferous of northeastern Ohio .

Life restoration of the Late Devonian placoderm fish Ptyctodus

Fossil of the Early Ordovician-Permian benthic alga Receptaculites

Fossilized stump of the Carboniferous-Permian club moss relative Sigillaria

Fossilized leaves and branches of the Devonian-Triassic horsetail relative Sphenophyllum

Fossilized shell of the Late Ordovician-Late Triassic brachiopod Spirifer

Modern shells of the polychaete worm Spirorbis

Fossilized shell of the Ordovician-Silurian brachiopod Strophomena

Fossil of the Cambrian trilobite Tricrepicephalus

Illustration of a fossilized shell in multiple views of the Silurian monoplacophoran mollusc Tryblidium reticulatum . Head region is to the left.