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 Thomas Holtz found "Appalachiosaurus" to be an albertosaurine in 2004, but his more recent unpublished work locates it just outside Tyrannosauridae, in agreement with other authors.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
The Bones of Zora The Bones of Zora The Bones of Zora is a science fiction novel by American writers L. Sprague de Camp and Catherine Crook de Camp, the ninth book of the former's "Viagens Interplanetarias" series and the seventh of its subseries of stories set on the fictional planet Krishna. Chronologically it is the sixth Krishna novel. It was first published in hardcover by Phantasia Press in 1983, and in paperback by Ace Books in August, 1984 as part of the standard edition of the Krishna novels. An E-book edition was published by Gollancz's SF Gateway imprint on September 29, 2011 as