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The claws were unusually large, approximately 1 m (3.3 ft) long if restored, very straight and flattened. Maleev considered that the claws belonged to a giant marine turtle and named the new genus and species Therizinosaurus cheloniformis, also erecting the Therizinosauridae to include the new species. [1]
Though the stocky claws of Alxasaurus resulted in low-stress magnitudes, the stress was greater with the curvature and elongation of the claws in Falcarius, Nothronychus and Therizinosaurus. Some of the highest stress, deformation, and strain magnitudes were obtained in the scratch/digging scenario, the hook-and-pull scenario, in contrast ...
He concluded that Therizinosauridae, Deinocheiridae, and Segnosauridae, which all had enlarged forelimbs, represented the same taxonomic group. Segnosaurus and Therizinosaurus were particularly similar, leading Perle to suggest they belonged in a family to the exclusion of Deinocheiridae (today, Deinocheirus is recognized as an ornithomimosaur).
Holotype claw cast of Therizinosaurus. 1954. Evgeny Maleev described the new genus and species Therizinosaurus cheloniformis. from the Nemegt Formation He interpreted it as a gigantic turtle. Maleev also named the family Therizinosauridae to contain this species. [1]
Nothronychus (meaning "slothful claw") is a genus of therizinosaurid theropod dinosaurs that lived in North America during the Late Cretaceous period. The type species, Nothronychus mckinleyi, was described by James Kirkland and Douglas G. Wolfe in 2001.
Like other therizinosaurids, Erlikosaurus had a large gut for food processing, strong arms ending in elongated claws, and a backwards directed pelvis. Erlikosaurus is classified as a therizinosaur within the Therizinosauridae. Therizinosaurs were long-enigmatic dinosaurs with unclear relationships during the early years of research.
Segnosaurus is a genus of therizinosaurid dinosaur that lived in what is now southeastern Mongolia during the Late Cretaceous, about 102–86 million years ago.Multiple incomplete but well-preserved specimens were discovered in the Gobi Desert in the 1970s, and in 1979 the genus and species Segnosaurus galbinensis were named.
In general Falcarius can be seen as a transitional form between the original theropod build and the more derived Therizinosauridae. Falcarius shared some derived traits with the therizinosaurids: it had a long neck, small head with teeth adapted for eating plant material, a more robust arm with large hand-claws and a more vertical position of ...