Ancient Skull Helps Scientists Identify New Species of Sea Creature – Level 2

Keyword Description
Prognathodon cipactli A newly identified species of ancient marine reptile.
Mosasaurs Large marine reptiles that lived during the time of dinosaurs.
Cretaceous period A time period from about 145 to 66 million years ago.

Scientists have made an exciting discovery by identifying a new species of ancient marine reptile, called Prognathodon cipactli. This creature lived around 70 million years ago when dinosaurs roamed the Earth. The discovery was made thanks to a skull found 25 years ago in the rocks of northern Mexico.

The skull belonged to a mosasaur, a group of large marine reptiles that were similar to today’s lizards and snakes. Mosasaurs were powerful predators that ruled the oceans near the end of the dinosaur age. The new species, P. cipactli, was about 5 to 6 meters long and had strong jaws and teeth, which helped it catch big prey like large fish and other sea creatures.

The name “cipactli” is inspired by Aztec mythology. It refers to a mythical creature that is part reptile and part fish. This name adds a cultural touch to the scientific discovery. The skull was found in the Méndez Formation, a place in Mexico known for having many marine fossils, which makes it ideal for such discoveries.

Even though only the skull was found, it provides a lot of information about this ancient predator. It shows that these creatures were already well adapted to hunt large prey before some of their relatives grew to even bigger sizes. This discovery helps scientists understand more about the complex ecosystems of the past, where these sea monsters were the top predators.

Bridging words

These words sound similar in English and Spanish: Why not practice them now?

English Spanish
Reptile Reptil
Fossil Fósil
Museum Museo

Time to discuss

  • Why do you think mosasaurs were such successful predators in their time?
  • How do cultural references like the Aztec creature cipactli enhance our understanding of scientific discoveries?
  • What can fossils teach us about the ecosystems and environments of the past?

Let’s Write

Answer the following questions in one paragraph

  • Describe the significance of finding a new species like Prognathodon cipactli.
  • How does the discovery of ancient creatures help us learn about Earth’s history?
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