Stegosaurus
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Stegosaurus is a genus of extinct herbivorous four-legged armored dinosaurs from the Late Jurassic, characterized by the distinctive kite-shaped upright plates along their backs and spikes on their ta
1899 life restoration showing the plates lying flat on the back with spikes all over the back
1901 life restoration of S. ungulatus by Charles R. Knight with paired dorsal plates and eight tail spikes
S. stenops skull cast, Natural History Museum of Utah
Nanosaurus
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Nanosaurus is an extinct genus of neornithischian dinosaur that lived about 155 to 148 million years ago, during the Late Jurassic in North America. Its fossils are known from the Morrison Formation o
Type specimen of Nanosaurus agilis Marsh 1877 (YPM VP 1913) as illustrated in 1908 (left) and cast of the bone impressions after the fragmentary bone was removed (right)
Othniel Charles Marsh's 1896 skeletal restoration of "Laosaurus" consors (now Nanosaurus).
Skeleton with outdated skull-shape based on Hypsilophodon