already coined, together with an Aublysodontidae, by Franz Nopcsa in 1928. This was a concept which afterwards enjoyed some popularity: Thomas Holtz proposed a stem clade definition of the Aublysodontinae in 2001, "Aublysodon and all taxa sharing a more recent common ancestor with it than with Tyrannosaurus". Aublysodon was for a time also used in definitions of higher-level taxa. Holtz proposed a node clade definition of the Tyrannosauridae in 2001 as "all descendants of the most recent common ancestor of Tyrannosaurus and Aublysodon", using Aublysodon as an anchor taxon. Paul Sereno has also used Aublysodon as an anchor taxon for the Tyrannosauridae, although his definition was problematic for other reasons. These concepts have now been redefined without the dubious name. Because Aublysodon is today considered a nomen dubium based on material probably belonging to Daspletosaurus, its affiliations are likely tyrannosaurid and the terms Aublysodontinae and Aublysodontidae have become irrelevant. See also Timeline of tyrannosaur research Footnotes References Dodson, Peter & Britt, Brooks & Carpenter, Kenneth & Forster, Catherine A. & Gillette, David D. & Norell, Mark A. & Olshevsky, George & Parrish, J. Michael & Weishampel, David B. The Age of Dinosaurs. Publications International, LTD. p. 128. . Holtz, TR, Jr. (2001), "The phylogeny and taxonomy of the Tyrannosauridae" in: K Carpenter & D Tanke [eds.], Mesozoic Vertebrate Life. Indiana Univ. Press, pp. 64–83. Jacobsen, A.R. 2001. "Tooth-marked small theropod bone: An extremely rare trace". p. 58-63 In: Mesozoic Vertebrate Life. Ed.s Tanke, D. H., Carpenter, K., Skrepnick, M. W. Indiana University Press. Late Cretaceous dinosaurs of North America Nomina dubia Tyrannosaurids Fossil taxa described in 1868 Taxa named by Joseph Leidy Paleontology in Montana Campanian genus first appearances Campanian genus extinctions