First Children Encyclopedia

(Marvins-Underground-K-12) #1

Anything it could catch, including pterosaurs who flew too close to the water’s surface.


Some people
think the “monster” in
Lock Ness, a Scottish Lake,
is a plesiosaur that was trapped
there when the sea receded
millions of years ago!

W


ei


rd^


or wh
at
?

Monsters of the deep


205


Liopleurodon may have
reached 25 m (80 ft).

The dagger-like teeth
were twice as long as
those of T. re x.

What’s that?


Elasmosaurus was also


a plesiosaur, but it was


long-necked. Its four


paddle-shaped limbs


propelled it easily


through the water.


It grew up to 14 m


(46 ft) in length.


Liopleurodon

Jellyfish have been
around for about 400
million years.

Corals are fragile animals,
but they have managed to
survive since the dinosaurs.

The great white shark’s
ancestors date back to the
Cretaceous period.

Squid were on the menu
for ichthyosaurs, shown
by fossil evidence.

Snails are also present in
fossil form, showing they
too are great survivors.

I recognize that!


Many Mesozoic occupants of


the Earth’s seas would have


been familiar to us.

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