First Children Encyclopedia

(Marvins-Underground-K-12) #1

. Triceratops preyed on T. rex Yes. There’s evidence that


A hip question


187


Theropods, the
meat-eaters, such
as Dilophosaurus.

Sauropodomorphs, such
as Brachiosaurus, with their
small heads and long necks.

I’m in this group!


Saurischians can be


divided into two


main groups:


Strangely enough,
scientists believe that birds
have evolved from lizard-
hipped dinosaurs – not
bird-hipped dinosaurs as
you might expect!

W


ei


rd


or^ wha
t
?

Ornithischians


These were all plant-


eaters. The swept-back


bones allowed more


room for the digestive


organs, and meant


their bellies could be


carried well back,


allowing some to walk


or run away from


danger on two legs.


Saurischians


All meat-eating


dinosaurs were lizard-


hipped, but some plant-eaters


were also lizard-hipped. T.


rex was lizard-hipped, but so


was the mighty plant-eating


Diplodocus, whom you


will meet on page 50.


Thyreophorans, the four-
footed, armour-plated
dinosaurs (e.g. Stegosaurus).

Marginocephalians, who
had heads with bony frills
or horns (e.g. Triceratops).

Ornithopods, the
two-legged plant-eaters
(e.g. Iguanodon).

I'm in that group!


Ornithischians can


be divided into three


main groups:


T. re x

Triceratops


Most lizard-hipped
dinosaurs had a pair of
hip bones that pointed
forwards or down.
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