Apatosaurus fossils date to between 154 and 150 million years ago. That means they existed for about 4 million years.
Apatosaurus lived between 154 and 150 million years ago. This was during the Kimmeridgian and Tithonian stages of the Jurassic period.
The youngest known fossils of Apatosaurus date to 150 million years ago. Thus, Apatosaurus probably died out around 150 million years ago.
150 years
There are four accepted species of Apatosaurus. They are Apatosaurus ajax, Apatosaurus excelsus, Apatosaurus louisae, and Apatosaurus parvus.
Apatosaurus excelsus existed from about 154 to 151 million years ago. This was during the Kimmeridgian and Tithonian stage of the Jurassic period.
Brontosaurus is an invalid name for Apatosaurus excelsus. Apatosaurus excelsus fossils date to between 154 and 151 million years ago. This was during the Kimmeridgian and Tithonian stages of the Jurassic period.
Brontosaurus is an invalid name for Apatosaurus excelsus. Apatosaurus excelsus existed from about 154 to 151 million years ago, during the Kimmeridgian and Tithonian stage of the Jurassic period.
The apatosaurus is the apatosaurus which is an herbivore.
Apatosaurus lived between 154 and 150 million years ago. This was during the Kimmeridgian and Tithonian stages of the Jurassic period.
Apatosaurus fossils date to between 154 and 150 million years ago. This was during the Kimmeridgian and Tithonian stages of the Jurassic period.
Brontosaurus is an invalid name for Apatosaurus excelsus. Because they were so large, the only predator of adult Apatosaurus would be Allosaurus, if they had any predators. Young Apatosaurus had many predators, however, including Ornitholestes and Ceratosaurus.
Apatosaurus fossils date to between 154 and 150 million years ago. After that, they disappear from the fossil record, so it is safe to say they probably died out around 150 million years ago.