Classification and systematicsAlbertosaurus is a member of the theropod family Tyrannosauridae, specifically the subfamily Albertosaurinae. Its closest relative is the slightly older Gorgosaurus libratus (sometimes called Albertosaurus libratus; see below). These two species are the only described albertosaurines, but other undescribed species may exist. Thomas Holtz found Appalachiosaurus to be an albertosaurine in 2004, but his more recent unpublished work places it as a basal eotyrannosaurian just outside of Tyrannosauridae, in agreement with other authors.
Classification and systematicsAlbertosaurus is a member of the theropod family Tyrannosauridae specifically the subfamily Albertosaurinae Its closest relative is the slightly older Gorgosaurus libratus (sometimes called Albertosaurus libratus; see below) These two species are the only described albertosaurines but other undescribed species may exist Thomas Holtz found Appalachiosaurus to be an albertosaurine in 2004 but his more recent unpublished work places it as a basal eotyrannosaurian just outside of Tyrannosauridae in agreement with other authors