Page 121 - The Dinosaur Book and Other Wonders of the Prehistoric World (DK-Smithsonian)

Carnotaurus

These tiny arms were
useless for hunting but
Sinornithosaurus
may have had other uses.

Long feathers
almost hide the sharp
claws of this small,
long-armed hunter. Citipati

Dubreuillosaurus

Fossils of Citipati
show it brooding
eggs with its long,
feathered arms.

Most hunters had
three-fingered hands
with sharp claws.

GIANT ARMS

The enormous hands of this
Deinocheirus Deinocheirus, which is Greek
dinosaur earned it the name
for “horrible hand.” The arms
were 8 ft (2.5 m) long and
ended in hands that were
1

The plant-eating about 2 ⁄2 ft (76 cm) long.
The three-fingered hand
Deinocheirus had huge hands, had huge, blunt claws.
each with three clawed fingers
that it probably used for defense.

Sinornithosaurus, developed much longer feathered arms, and they
arms and hands. These were often used in the became the first birds. By
same way, but recent fossil evidence shows that contrast, some very powerful hunters, including
they carried long feathers, almost like wings, and Carnotaurus and the tyrannosaurs, evolved
Citipati used these to shelter its eggs and young. very short arms and relied on their jaws to
Relatives of these animals had even longer subdue prey. 119

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