[D] Dynamosaurus imperiosus [jG]
Cretaceous Late Campanian Maastrichtian
Saurischia Theropoda Tyrannosauria Tyrannosauridae
Tyrannosaurus rex = Dynamosaurus imperiosus (Osborn, 1905) >> ?Manospondylus gigas (Cope, 1892)
Tyrannosaurus rex > = \\\"Ornithomimus\\\" grandis (Marsh, 1890)
Tyrannosaurus rex > Tyrannosaurus stanwinstonorum (Pickering, 1995)
Tyrannosaurus rex > Tyrannosaurus zhuchengensis (Hu, Cheng, Pang and Fang, 2001)
(\\\"imperial powerful lizard\\\"). Dynamosaurus was discovered before Tyrannosaurus rex, but both Tyrannosaurus and Dynamosaurus were published in the same paper (in 1905), Tyrannosaurus is mentioned first in this paper. Osborn chose Tyrannosaurus as the true name when, in 1906, he realized that they were the same species.
Named for its great size; originally distinguished from Tyrannosaurus by the supposed dermal armor found with the ribs. (The armor belonged to a nodosaur.) More recent research indicates that Tyrannosaurus had a robust and a slender morph, which may represent, respectively, female and male individuals, or possibly two distinct species or even two genera, in which case the name Dynamosaurus might be used for the more massive form.