List of the Mesozoic life of Alaska

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

Life restoration of the Late Cretaceous dome-headed dinosaur Alaskacephale and inset diagram depicting it with an anachronistic human to scale

Fossilized shell of the Late Cretaceous ammonoid cephalopod Anapachydiscus

Fossilized shells of the Middle Jurassic ammonoid cephalopod Arcticoceras

Fossilized shell of the Early Jurassic ammonoid cephalopod Arnioceras

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

Fossilized shell of the Late Cretaceous ammonoid cephalopod Baculites

Fossilized shell of the Middle Jurassic ammonoid cephalopod Cadoceras

Fossilized shell of the Early Jurassic-Early Cretaceous ammonoid cephalopod Calliphylloceras

Shells of modern Capulus cap sea snails

Life restoration of the Late Triassic-Middle Jurassic nautiloid cephalopod Cenoceras

Shell and spines of a Cidaris sea urchin

Life restoration of the Early Jurassic ammonoid cephalopod Dactylioceras

Restoration of several species of the Late Cretaceous ammonoid cephalopod Didymoceras

Fossilized shell of the Early-Late Cretaceous ammonoid cephalopod Douvilleiceras

Restoration of the Late Cretaceous duck-billed dinosaur Edmontosaurus annectens

Fossilized shell of the Late Cretaceous ammonoid cephalopod Eubostrychoceras

Fossilized shell of the Cretaceous ammonoid cephalopod Gaudryceras

Restored foliage of the Late Cretaceous-Miocene ginkgo tree Ginkgo adiantoides

Interior and exterior of a fossilized shell of the Late Triassic-Eocene marine bivalve Gryphaea

Life restoration of the Late Cretaceous toothed bird Hesperornis

Fossilized shell of the Early Jurassic-Late Cretaceous marine bivalve Inoceramus with a human indicating its size

Fossilized shell of the Permian-modern marine bivalve Isognomon

Fossilized shell of the Middle Jurassic ammonoid cephalopod Kosmoceras spinosum

Fossilized shell of the Early Jurassic-Late Cretaceous ammonoid cephalopod Lytoceras

Shell in multiple views of a Margarites sea snail

Fossilized shell of a Modiolus , or horsemussel

Fossilized shell of the Jurassic-Cretaceous marine bivalve Myophorella

Shells washed ashore of Mytilus mussels

Life restoration of the Late Cretaceous tyrannosaur Nanuqsaurus

Shell in multiple views of a Nerita polita sea snail

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

Fossilized shell in multiple views of the Middle Jurassic ammonoid cephalopod Oxycerites

Life restoration of two of the Late Cretaceous horned dinosaur Pachyrhinosaurus perotorum

Fossilized shell of the Cretaceous brachiopod Peregrinella

Life restoration of the Early Jurassic-Late Cretaceous ammonoid cephalopod Phylloceras

Leaves and fruit of a living Platanus , or plane tree

Fossilized shell of the Triassic ammonoid cephalopod Protrachyceras

Fossilized shell of a Pseudomelania sea snail

Fossilized shell of the Early-Late Cretaceous ammonoid cephalopod Puzosia

Fossilized shell of the Silurian-Eocene articulate brachiopod Rhynchonella

Life restoration of the Late Cretaceous dromaeosaurid Saurornitholestes preying upon a multituberculate mammal

Fossilized shells of the marine bivalve Solecurtus

Fossilized leaf of the Late Cretaceous ginkgo relative Sphenobaiera

Shell of a Spondylus , or spiny oyster

Fossils of the ichnogenus Teredolites , produced by bivalves boring into wood.

Fossilized skeleton found in Alaska of the Late Cretaceous troodontid Troodon

Fossilized skeleton found in Alaska of the Late Cretaceous duck-billed dinosaur Ugrunaaluk