Albertosaurus older "Gorgosaurus libratus" (sometimes called "Albertosaurus libratus"; see below). These two species are the only described albertosaurines; other undescribed species may exist. Thomas Holtz found "Appalachiosaurus" to be an albertosaurine in 2004, but his more recent unpublished work locates it just outside Tyrannosauridae, in agreement with other authors. The other major subfamily of tyrannosaurids is the Tyrannosaurinae, which includes "Daspletosaurus", "Tarbosaurus" and "Tyrannosaurus". Compared with these robust tyrannosaurines, albertosaurines had slender builds, with proportionately smaller skulls and longer bones of the lower leg (tibia) and feet (metatarsals and phalanges). Below is the cladogram of the Tyrannosauridae based on the phylogenetic
Servant of the Bones a ghost, a demon, or an angel. He is trying to understand why God has denied him the Stairway to Heaven by allowing him to be made into an immortal spirit who is bound to the gold-encased bones of his mortal body. As a genie, he must obey the Master of those bones (whoever has them at the moment) and become the Master's Servant, whether for good or evil. Thus the title, Servant of the Bones. Azriel is telling the story of his transformation into and subsequent existence as an immortal genii who is forced to obey the Master who