List of the Paleozoic life of Maryland

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

Fossils of the Ordovician-Permian bryozoan Amplexopora
Fossilized shell of the Silurian-Late Devonian brachiopod Atrypa reticularis
Fossilized shell of the Silurian-Early Triassic mollusc Bellerophon
Fossils in enrolled posture of the Silurian trilobite Calymene niagarensis
Assemblage of fossilized shells of the Ordovician brachiopod Cincinnetina
Fossil of the Middle Ordovician-Carboniferous horn coral Cornulites
Fossil of the Late Ordovician-Middle Devonian trilobite Dalmanites
Life restoration of the Silurian eurypterid ("sea scorpion") Dolichopterus
Life restoration of the Silurian-Early Devonian eurypterid ("sea scorpion") Erettopterus
Life restoration of Silurian eurypterid ("sea scorpion") Eurypterus
Fossil of the Late Ordovician-Permian tabulate coral Favosites
Fossilized shell of the Late Devonian-Late Triassic ammonoid cephalopod Goniatites
Fossil of the Ordovician bryozoan ("moss animal") Hallopora
Fossilized shells of the Ordovician-Carboniferous sea snail Holopea
Fossil of the Middle-Late Ordovician giant trilobite Isotelus .
Shell of the Cambrian-modern brachiopod Lingula
Life restoration of the Permian snake-like amphibian Lysorophus showing speculative egg-coiling behavior
Fossilized shell of the Carboniferous-Permian nautiloid cephalopod Metacoceras
Fossilized shell of the Early Devonian – Triassic sea snail Naticopsis
Restoration of the Cambrian trilobite Olenellus
Fossilized shell of the Silurian-Early Triassic sea snail Platyceras
Restoration of the Silurian-Middle Devonian eurypterid ("sea scorpion") Pterygotus
Modern specimen of the marine bivalve Solemya
Fossilized shell of the Late Ordovician-Late Triassic brachiopod Spirifer
Fossilized shell of the Ordovician-Silurian brachiopod Strophomena
Fossilized shell of the Early Ordovician-Late Devonian probable mollusc Tentaculites
Fossilized head of the Silurian eurypterid ("sea scorpion") Waeringopterus