They both had teeth and they both lived quite a while ago.
No, their names are common nouns like dog and cat.
There were three recognized species of Smilodon, or sabertoothed cat. The largest was Smilodon Populator, at over 800 pounds, the largest cat that ever lived.
Sabertoothed tiger
sabertoothed tigers.
They are all extinct.
There are four currently accepted species in the genus Stegosaurus. They are Stegosaurus armatus, Stegosaurus stenops, Stegosaurus sulcatus, and Stegosaurus longispinus.
No, the noun 'stegosaurus' is a common noun, a general word for a type of dinosaur of the Jurassic Period. A proper noun is the name of a specific person, place, or thing, such as Godzilla, a fictional stegosaurus type creature.
Stegosaurus was herbivorous and had a spiked tail. There were some other dinosaurs similar to Stegosaurus, but Stegosaurus itself was probably the most common dinosaur we know of that has a spiked tail.
The remains of about 80 different Stegosaurus have been discovered. They belong to four different species, Stegosaurus armatus, Stegosaurus stenops, Stegosaurus sulcatus, and Stegosaurus longispinus.
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Stegosaurus? Stegosaurus?
There were four different species of Stegosaurus. The largest was Stegosaurus armatus, which grew to be 30 feet long. Stegosaurus longispinus and Stegosaurus stenops both grew to be about 23 feet long.