(2005): An unusual multiindividual tyrannosaurid bonebed in the Two Medicine Formation (Late Cretaceous, Campanian) of Montana (USA).
(1998): Possible evidence of gregarious behavior in tyrannosaurids. GAIA, 15: 271-277.
Previously, paleontologists thought this type of wide-skulled tyrannosaurid only appeared 70 million years ago, whereas Lythronax shows it had evolved at least 10 million years earlier.
This study also indicates that tyrannosaurid dinosaurs (the group of tyrannosaurs that includes T.
They studied the skull, teeth, nose, spine, shoulders, forearms, pelvis and hind legs of the new fossil, and compared the features to larger evolutionary versions of
Tyrannosaurid dinosaurs.
The serrated teeth of
tyrannosaurid dinosaurs, and biting structures in other animals.
The newest evidence in this scientific debate evolved from several years of study of the nasal bones and structure of dinosaurs -- in this particular project, those of a duckbill, a
tyrannosaurid, and an ostrich-like creature.
U of A paleontologist Miriam Reichel analyzed the teeth of the entire
tyrannosaurid family of meat eating dinosaurs and found T.
Other large-bodied Chinese theropods are larger than this supposed Szechuanosaurus specimen, with femoral lengths comparable to some individuals of the
tyrannosaurid Tarbosaurus (Table 1).
"I have not seen anything to justify the shadow of doubt," said Thomas Carr, who works on
tyrannosaurid dinosaurs at Carthage College in Kenosha, Wisconsin.
This led the scientists to deduce that a protozoan parasite was to blame for the diseased jawbones seen in many
tyrannosaurid fossils.