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Therizinosaurus (/ ˌ θ ɛ r ə ˌ z ɪ n oʊ ˈ s ɔːr ə s / ⓘ; meaning 'scythe lizard') is a genus of very large therizinosaurid dinosaurs that lived in Asia during the Late Cretaceous period in what is now the Nemegt Formation around 70 million years ago. It contains a single species, Therizinosaurus cheloniformis.
Forelimbs of Therizinosaurus, specimen IGM 100/15 displayed at Nagoya City Science Museum. Therizinosaurs were long considered an enigmatic group, whose mosaic of features resembling those of various different dinosaur groups, and scarcity of their fossils, led to controversy over their evolutionary relationships for decades after their initial discovery.
The humerus (upper arm) was exceptionally robust and flexible with wide lower ends as seen on the humeri of the therizinosaurids Nothronychus and Therizinosaurus. Not only that but the biceps muscle was prominently well-developed in Therizinosaurus. [2] [12] In Segnosaurus, the deltopectoral crest (deltoid muscle attachment) was strongly built. [3]
Therizinosaurus is introduced in Jurassic World Dominion, [280] becoming one of the first fully feathered dinosaurs to appear in the film series. [192] The Therizinosaurus is partially blind due to cataracts and uses echolocation to get around, producing a series of clicking noises that reverberate in its environment.
Barsbold proposed the Deinocheirosauria and included Therizinosaurus as a member. [5] In another paper during the same year, Barsbold referred a shoulder and forearm found in the same strata as the Therizinosaurus type specimen to that genus because of the resemblance between the specimens claws. He observed that the anatomy of the arm and ...
Therizinosaurs, also known as segnosaurs, were theropod dinosaurs and members of the clade Therizinosauria. For many years after their discovery, the exact placing of this group within dinosaurs was somewhat speculative.
Maniraptora is a clade of coelurosaurian dinosaurs which includes the birds and the non-avian dinosaurs that were more closely related to them than to Ornithomimus velox.It contains the major subgroups Avialae, Dromaeosauridae, Troodontidae, Oviraptorosauria, and Therizinosauria.
(2022) recovered Paralitherizinosaurus as a member of a clade containing Therizinosaurus, Suzhousaurus, and an unnamed therizinosaurid from the Bissekty Formation of Uzbekistan. The cladogram below displays the results of their phylogenetic analyses. [1]