Tyrannomimus (genus name: Tyrannomimus, meaning "tyrant imitator") is from Japan and is an extinct genus of ornithomimid dinosaurs. The type species is Tyrannomimus fukuiensis. [1]
Discovery and naming[]
The first fingertip fossil was produced in 1998, and later in 2018, 28 additional specimens were obtained, accelerating research. As of 2019, 55 fossils have been discovered Tyrannomimus was described based on the holotype FPDM-V-11311, which consists of a partial postcranial skeleton The genus name is derived from the fact that it shows a morphology similar to that of Tyrannosauridae centered on the iliac bone, etc., and the species small name is derived from the fact that it was produced in Fukui Prefecture.
Description[]
Tyrannomimus was about two meters long.
Several distinctive features were indicated. The holotype shows two autapomorphies, unique derived traits, for the Ornithomimosauria. The recessus tympanicus dorsalis, the small upper hollow in the ear zone, is high with the underside divided in two by a horizontally running leg ridge. In the assigned specimens, the humerus shows a deep pit on the anterior side of the upper side. This may be an additional autapomorphy, depending on whether these specimins have been correctly assigned.
Classification[]
Tyrannomimus was a member of the family Deinocheiridae and its closest evolutionary relatives are the genera Harpymimus, Garudimimus, Deinocheirus and Paraxenisaurus. Fossils of Mexican genus have been discovered in sediments of the Cerro del Pueblo Formation.