Is the mosasaurus extinct?
During the last 20 million years of the Cretaceous period (Turonian–Maastrichtian ages), with the extinction of the ichthyosaurs and pliosaurs, mosasaurs became the dominant marine predators. They became extinct as a result of the K-Pg event at the end of the Cretaceous period, about 66 million years ago.
When did mosasaurus go extinct?
66 million years ago
Where have mosasaurus bones been found?
The Maastrichtian is the epoch comprising the last 6 million years of the Cretaceous. Mosasaur fossils have been found all over the world including northern Europe, eastern Europe, Russia, Turkey, the Middle East, northern Africa, Canada, South America, the United States, and even on islands of coastal Antarctica.
Are plesiosaurs dinosaurs?
Other prehistoric reptiles Marine reptiles, such as ichthyosaurs, plesiosaurs and mosasaurs are not dinosaurs. Despite its prehistoric appearance, Dimetrodon was not a dinosaur. It was a different kind of extinct reptile and lived even longer ago than dinosaurs.
Why are ichthyosaurs not dinosaurs?
Ichthyosaurs were not dinosaurs, but represent a separate group of marine vertebrates. Because ichthyosaurs were so specialized and modified for life in the ocean, we don’t really know which group of vertebrates were their closest relatives.
Are ichthyosaurs still alive?
Ichthyosaurs thrived during much of the Mesozoic era; based on fossil evidence, they first appeared around 250 million years ago (Ma) and at least one species survived until about 90 million years ago, into the Late Cretaceous.
What event killed the dinosaurs?
The Cretaceous–Paleogene (K–Pg) extinction event (also known as the Cretaceous–Tertiary (K–T) extinction) was a sudden mass extinction of three-quarters of the plant and animal species on Earth, approximately 66 million years ago.
What is the biggest sea creature in history?
The blue whale
What is the biggest sea animal that ever lived?
Blue Whale
What was bigger than Megalodon?
Comparison With Modern Day and Extinct Animals Megalodon has also been found to be far larger than the gigantic theropod dinosaurs such as Spinosaurus, T-Rex, as well as the large ocean going marine reptiles such as Basilosaurus, and Tylosaurus.