List of the Mesozoic life of Arizona

This list of the Mesozoic life of Arizona contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Arizona and are between 252.17 and 66 million years of age.

Fossilized shell of the Early Cretaceous ammonoid cephalopod Acanthohoplites
Fossilized shell of the Late Cretaceous ammonoid cephalopod Allocrioceras
Restoration of the Late Triassic phytosaur Angistorhinus
Petrified trunk segments of the Permian-Late Triassic conifer tree Araucarioxylon arizonicum . This species is the state fossil of Arizona
Fossilized shell of the Late Cretaceous ammonoid cephalopod Baculites
Fossil slab and counterslab of the bony fish Boreosomus
Restoration of the Late Triassic theropod dinosaur Camposaurus
Life restoration of the Late Triassic-Eocene lungfish Ceratodus
Restoration of the Late Triassic coelacanth fish Chinlea
Life restoration of Coelophysis kayentakatae
Fossilized shell of the Cretaceous-modern oyster Crassostrea
Life restoration of the Early Jurassic theropod dinosaur Dilophosaurus resting
Restoration of the Late Triassic dinosaur relative Dromomeron
Restoration of the Middle Triassic amphibian Eocyclotosaurus
Fossilized shell of the Late Cretaceous ammonoid cephalopod Fagesia
Fossilized shell of the Carboniferous-Eocene bivalve Gervillia
Interior and exterior of a fossilized shell of the Late Triassic-Eocene marine bivalve Gryphaea
Fossilized skull of the Middle Triassic amphibian Hadrokkosaurus
Fossilized shell of the Early Jurassic-Late Cretaceous marine bivalve Inoceramus with a human indicating its size
Restoration of the Early Jurassic turtle Kayentachelys
Life restoration of the Early Jurassic theropod dinosaur Kayentavenator
Fossilized skull of the Late Triassic phytosaur Leptosuchus
Electron micrograph of fossilized teeth from the Early Jurassic-Early Cretaceous freshwater shark Lissodus
A living Lunatia moon sea snail
Fossilized skull of the Late Triassic phytosaur Machaeroprosopus
Life restoration of the Late Triassic amphibian Metoposaurus with an anachronistic human to scale
Life restoration of the Late Triassic-Middle Jurassic synapsid (mammal precursor) Morganucodon
Fossilized shell of the Jurassic-Cretaceous sea snail Nerinea
Restoration of the Late Triassic–Early Jurassic synapsid (mammal precursor) Oligokyphus
Life restoration of the Late Triassic phytosaur Parasuchus
Restoration of the Late Triassic synapsid (mammal precursor) Placerias with an anachronistic human to scale
Restoration of the Late Triassic crocodile relative Poposaurus with an anachronistic human to scale
Life restoration of the Early Jurassic frog Prosalirus
Life restoration of the Late Triassic crocodile relative Revueltosaurus
A living Ringicula sea snail
Fossilized skeleton of the Late Triassic phytosaur Rutiodon
Illustration in multiple views of the fossilized skull of the Early Jurassic sauropodomorph dinosaur Sarahsaurus
Fossilized skeleton of the Late Triassic-Early Jurassic bony fish Semionotus
Life restoration of the Early-Late Cretaceous brachiosaur Sonorasaurus
Life restoration of the Early Cretaceous Iguanodon relative Tenontosaurus
Restoration of the Late Triassic reptile Trilophosaurus with an anachronistic human to scale
Restoration of a pair of the Late Triassic aetosaur Typothorax
Life restoration of the Late Triassic reptile Vancleavea