This is the group name for a number of species, including:
Albertosaurus libratus (Lambe, 1914)
- Skull lenght : up to 1 m.
- Total length : 8.6 m.
- Hip height : 2.8 m
- Weight : 2.5 tonnes
Albertosaurus arctunguis (Parks, 1928)
- Skull length : up to 1 m.
- Total length : 8 m.
- Hip height : 2.5 m.
- Weight : 2 tonnes
Albertosaurus looked a lot like Tyrannosaurus, but they were smaller. Like Tyrannosaurus, they had small arms and a huge head with recurved serrated teeth. These teeth however, are more strongly curved than those of Tyrannosaurus. Unlike Tyrannosaurus, who evolved a lot, all the found specimens of Albertosaurus suggest that they didn't evolve much in over 10 million years, except for becoming a bit more gracile.