Which marine reptiles had very long necks?

Elasmosaurs, a type of plesiosaur

Marine Reptiles of Prehistory Quiz: 10 Questions That Test What You Know

Mary Anning was only a girl when she helped uncover an ichthyosaur on the cliffs of Lyme Regis, and this marine reptiles of prehistory quiz follows the sea monsters she made famous. Meet plesiosaurs, giant mosasaurs from the inland seas of Kansas and the myths of the Loch Ness monster.

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🎯 Daily Trivia Challenge • 🧠 10 Questions • ⏱️ 150 Seconds

Question 1 / 10 Time: 150s

Dinosaurs
Were ichthyosaurs and plesiosaurs dinosaurs?
Anning
Which young fossil hunter helped find an early ichthyosaur?
Dolphin
Which marine reptile looked most like a dolphin?
Neck
Which marine reptiles had very long necks?
Mosasaur
Which group of marine reptiles were giant relatives of lizards?
Kansas
Why are marine reptile fossils found in Kansas?
Live
How did ichthyosaurs give birth?
Nessie
Which prehistoric reptile is often linked to Loch Ness legends?
Eyes
Which ichthyosaur had some of the largest eyes of any vertebrate?
Extinct
When did the last mosasaurs and plesiosaurs die out?

Explanations: answer key for all 10 questions

Q1: Were ichthyosaurs and plesiosaurs dinosaurs?
Answer: No, they were marine reptiles
They lived alongside dinosaurs.
Q2: Which young fossil hunter helped find an early ichthyosaur?
Answer: Mary Anning
She later found the first complete plesiosaur.
Q3: Which marine reptile looked most like a dolphin?
Answer: Ichthyosaur
This is convergent evolution.
Q4: Which marine reptiles had very long necks?
Answer: Elasmosaurs, a type of plesiosaur
Some necks had over 70 vertebrae.
Q5: Which group of marine reptiles were giant relatives of lizards?
Answer: Mosasaurs
Some grew over 15 meters.
Q6: Why are marine reptile fossils found in Kansas?
Answer: An inland sea once covered it
The Western Interior Seaway split North America.
Q7: How did ichthyosaurs give birth?
Answer: Live young in the water
Fossils show babies being born.
Q8: Which prehistoric reptile is often linked to Loch Ness legends?
Answer: Plesiosaur
There is no evidence it survived.
Q9: Which ichthyosaur had some of the largest eyes of any vertebrate?
Answer: Temnodontosaurus
Its eyes were about 26 cm wide.
Q10: When did the last mosasaurs and plesiosaurs die out?
Answer: 66 million years ago
Ichthyosaurs vanished earlier.

Marine Reptiles Of Prehistory Quiz – Sea Monsters of the Mesozoic

While dinosaurs ruled the land, other reptiles dominated the seas. Ichthyosaurs looked like dolphins, plesiosaurs had flippers and often long necks and mosasaurs were giant swimming relatives of lizards and snakes. None of them were dinosaurs.

Mary Anning made famous discoveries on the cliffs of Lyme Regis in England in the early 1800s, including ichthyosaurs and the first complete plesiosaur. Her finds helped show that species could go extinct, changing scientific thinking.

Marine reptiles breathed air and many gave birth to live young at sea. Fossils from Kansas, once covered by an inland sea, reveal giant mosasaurs. The last plesiosaurs and mosasaurs died out 66 million years ago, despite modern Loch Ness legends.

What This Quiz Teaches

Dinosaur fans and students will enjoy these questions.

Which reptiles ruled the seas
Who Mary Anning was
How ichthyosaurs lived
What mosasaurs were
When they went extinct

Did You Know?

Some plesiosaurs swallowed stones.
Ichthyosaurs could dive deep.
Mosasaurs had double-hinged jaws.
Liopleurodon had a huge head.
Shastasaurus was a giant ichthyosaur.