After the Dinosaurs

ROOM 10

Early seal — Acrophoca longirostris

Miocene · Miocene; Smithsonian material comes from the Pisco Formation.

complete skull and skeleton

comparative_taxon_visual

ROOM 10

Chalicothere mammal — Moropus elatus

Oligocene — early Arikareean · Oligocene in the Smithsonian catalog.

complete mounted skeleton

comparative_taxon_visual

ROOM 10

Walrus-whale — Odobenocetops peruvianus

Pliocene · Early Pliocene for the species; Smithsonian material comes from the Pisco Formation of Peru.

skull cast

comparative_taxon_visual

ROOM 10

Desmostylian mammal — Desmostylus hesperus

Miocene · Miocene.

skull cast

comparative_taxon_visual

ROOM 10

Baleen whale — Diorocetus hiatus

Middle Miocene · Middle Miocene.

skull

comparative_taxon_visual

ROOM 10

Swimming sea cow — Metaxytherium floridanum

Miocene — Clarendonian · Middle to Late Miocene; Smithsonian catalog uses Clarendonian.

mounted skeleton

comparative_taxon_visual

ROOM 10

Hippopotamus-like rhinoceros — Teleoceras fossiger

Miocene — Clarendonian · Miocene, Clarendonian.

composite

comparative_taxon_visual

ROOM 10

Early rhinoceros — Trigonias osborni

Late Eocene — Chadronian · Late Eocene.

composite

comparative_taxon_visual

ROOM 10

Long-necked rhinoceros — Paraceratherium transouralicum

Cenozoic — specimen chronology flagged for review · Smithsonian's current catalog record labels this specimen Miocene. Broader Paraceratherium literature is commonly associated with Oligocene deposits, so SAGE retains the catalog record but flags the age for specimen-level review.

skull cast

historical_photo_of_real_skull

ROOM 10

Woolly mammoth — Mammuthus primigenius

Pleistocene · Pleistocene.

composite

smithsonian_3d_model_render

ROOM 10

Steppe bison — Bison priscus

Pleistocene · Pleistocene.

skull

comparative_taxon_visual

ROOM 10

Wolverine — Gulo gulo

Pleistocene — Irvingtonian · Pleistocene, Irvingtonian for the documented Smithsonian fossil.

mounted skeleton

historical_anatomical_illustration

ROOM 10

Giant deer — Megaloceros giganteus

Quaternary — Late Pleistocene · The Smithsonian Deep Time specimen from Ireland lived approximately 15,200 to 11,100 years ago.

complete mounted skeleton

comparative_skeletal_mount

ROOM 10

Walking sea cow — Pezosiren portelli

Late Early to early Middle Eocene · Late Early or early Middle Eocene.

cast

Representative evidence-type visual; not the exact specimen.

ROOM 10

Double-horned rhinoceros — Menoceras arikarense

Oligocene — early Arikareean · Oligocene in the Smithsonian catalog.

composite

Representative evidence-type visual; not the exact specimen.

ROOM 10

Brontothere mammal — Megacerops coloradensis

Late Eocene — Chadronian · Late Eocene.

composite

Representative evidence-type visual; not the exact specimen.

ROOM 10

Early horse — Eohippus vasacciense

Early Eocene — Wasatchian · Eocene, Wasatchian.

composite

Representative evidence-type visual; not the exact specimen.

ROOM 10

Giant flightless bird — Diatryma gigantea

Early Eocene — Wasatchian · Early Eocene.

composite cast

Representative evidence-type visual; not the exact specimen.

ROOM 10

Early carnivoran mammal — Sinopa grangeri

Middle Eocene — Bridgerian · Eocene, Bridgerian.

cast

Representative evidence-type visual; not the exact specimen.

ROOM 10

Early ungulate relative — Uintatherium anceps

Middle Eocene — Bridgerian · Eocene, Bridgerian.

mounted fossil material

Representative evidence-type visual; not the exact specimen.

ROOM 10

Early horse — Protorohippus venticolum

Early Eocene — Wasatchian · Early Eocene.

skeleton

Representative evidence-type visual; not the exact specimen.

ROOM 10

Early dog — Hesperocyon gregarius

Oligocene — Orellan · Oligocene, Orellan.

fossil skeletal material

Representative evidence-type visual; not the exact specimen.

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Pangolin — Patriomanis americanus

Late Eocene — Chadronian · Eocene, Chadronian.

skeleton

Representative evidence-type visual; not the exact specimen.

ROOM 10

Early primate — Smilodectes gracilis

Middle Eocene — Bridgerian · Eocene, Bridgerian.

composite

Representative evidence-type visual; not the exact specimen.

ROOM 10

Early primate — Notharctus tenebrosus

Middle Eocene — Bridgerian · Eocene, Bridgerian.

skull

Representative evidence-type visual; not the exact specimen.

ROOM 10

American mastodon — Mammut americanum

Pleistocene · The Smithsonian Deep Time mastodon from Indiana lived approximately 15,500 to 11,500 years ago.

composite

Representative evidence-type visual; not the exact specimen.

ROOM 10

Black bear — Ursus americanus

Quaternary — exact display specimen age unresolved · The exact age and provenance of this composite Deep Time display have not yet been tied to a verified specimen-level catalog record.

composite

Representative evidence-type visual; not the exact specimen.