SAGE MUSEUM · DINOSAURS & DEEP TIME
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ROOM 07
Cretaceous Worlds
Dinosaurs at Their Most Diverse
18 SPECIMENS ·
5 INTERPRETIVE THREADS
Dinosaurs at Their Most Diverse.
Interpretive threads: Dino-sized Success Story · Predator vs. Prey · Plankton Proliferate · Birds are Dinosaurs · Three Animals, Two Meals, One Fossil
INTERPRETIVE THREADS
SPECIMENS & EVIDENCE
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Dromaeosaurid dinosaur — Saurornitholestes langstoni
Late Cretaceous — Campanian · Late Campanian.
hind limb cast
comparative_taxon_visual
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Sauropod dinosaur — Titanosauria indet.
Cretaceous — exact interval not yet established from the verified specimen-level source set · Exact age of this individual osteoderm remains unassigned pending specimen-level catalog linkage.
osteoderm
comparative_titanosaur_osteoderm_visual
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Pachycephalosaurian dinosaur — Stegoceras validum
Late Cretaceous — Campanian · Late Cretaceous, Campanian.
cast
comparative_taxon_visual
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Theropod dinosaur — Gorgosaurus libratus
Late Cretaceous — Campanian · Late Cretaceous, Campanian.
skull
comparative_exact_taxon_skull_visual
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Ankylosaurian dinosaur — Euoplocephalus tutus
Late Cretaceous — Campanian · Late Cretaceous, Campanian for the Smithsonian complete mounted reference used here.
cast
comparative_taxon_visual
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Hadrosaurid dinosaur — Prosaurolophus maximus
Late Cretaceous — Campanian · Late Cretaceous, Campanian.
skull
comparative_taxon_visual
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Toothed diving bird — Hesperornis regalis
Late Cretaceous · Late Cretaceous, Niobrara Formation.
composite
comparative_taxon_visual
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Sea turtle — Protostega gigas
Late Cretaceous · Approximately 85 million years old in the Smithsonian interpretation.
skeletal fossil
comparative_taxon_visual
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Pterosaur — Pteranodon sp.
Late Cretaceous — Santonian for documented Smithsonian material · Late Cretaceous.
skeletal fossil
comparative_taxon_visual
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Feathered theropod dinosaur — Sinosauropteryx prima
Early Cretaceous — Aptian · Approximately 130 to 125 million years ago.
cast
comparative_taxon_visual
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Feathered theropod dinosaur — Caudipteryx zoui
Early Cretaceous — Aptian · Early Cretaceous.
cast
comparative_taxon_visual
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Large predatory fish — Xiphactinus audax
Late Cretaceous — Coniacian for documented Smithsonian material · Late Cretaceous.
skull
comparative_taxon_visual
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Ammonite cephalopod — Placenticeras meeki
Late Cretaceous — Campanian · Late Cretaceous, Campanian.
shell fossil
comparative_taxon_visual
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Ankylosaurian dinosaur — Anodontosaurus lambei
Late Cretaceous — Maastrichtian · Late Cretaceous, Maastrichtian for the documented Smithsonian specimen.
tail club
comparative_cast_visual
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Ceratopsian dinosaur — Centrosaurus apertus
Late Cretaceous — Campanian · Late Cretaceous, Campanian.
skull
comparative_original_skull_visual
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Early toothed bird — Archaeopteryx lithographica
Late Jurassic — comparative predecessor · Late Jurassic, roughly 150 million years ago.
cast
comparative_original_fossil_visual
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Mosasaur with plesiosaur remains — Tylosaurus proriger and Plesiosauria indet.
Late Cretaceous · Approximately 81 to 85 million years old in the Smithsonian interpretation of this feeding association.
composite
Representative evidence-type visual; not the exact specimen.
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Early beaked bird — Confuciusornis dui
Early Cretaceous — Aptian · Early Cretaceous.
cast
Representative evidence-type visual; not the exact specimen.