Therizinosauria

Therizinosaurs; Temporal range: Cretaceous PreꞒ Ꞓ O S D C P T J K Pg N Possible Jurassic records
	Collection of five therizinosaurs, clockwise from top left: Suzhousaurus, Erliansaurus, Nothronychus, Falcarius and Jianchangosaurus.
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Dinosauria
Clade:	Saurischia
Clade:	Theropoda
Clade:	Maniraptora
Clade:	†Therizinosauria; Russell, 1997
Subgroups
	†Eshanosaurus?; †Falcarius; †Fukuivenator?; †Jianchangosaurus; †Lingyuanosaurus; †Thecocoelurus?; †Therizinosauroidea †Alxasaurus; †Beipiaosaurus; †Enigmosaurus; †Martharaptor; †Suzhousaurus; †Therizinosauridae; ;
Synonyms
	Segnosauria Barsbold, 1980; Segnosaurischia Dong, 1987;

Therizinosaurs (^ⓘ; once called segnosaurs) are an extinct group of large herbivorous theropod dinosaurs whose fossils have been mainly discovered from Cretaceous deposits in Asia and North America. Potential fragmentary remains have also been found in Jurassic deposits of Asia and Europe.^[1]^[2] Various features of the forelimbs, skull and pelvis unite these finds as both theropods and maniraptorans, making them relatives of birds. The name of the representative genus, Therizinosaurus, is derived from the Greek θερίζω (therízō, 'to reap' or 'scythe')^[4] and σαῦρος (saûros, 'lizard'). The older representative, Segnosaurus, is derived from the Latin sēgnis ('slow') and the Greek σαῦρος.

^ ^a ^b Wills, S.; Underwood, C. J.; Barrett, P. M. (2023). "Machine learning confirms new records of maniraptoran theropods in Middle Jurassic UK microvertebrate faunas". Papers in Palaeontology. 9 (2). e1487. Bibcode:2023PPal....9E1487W. doi:10.1002/spp2.1487.
^ ^a ^b ^c Xu, X.; Zhao, X.; Clark, J. (2001). "A New Therizinosaur from the Lower Jurassic Lower Lufeng Formation of Yunnan, China". Journal of Vertebrate Paleontology. 21 (3): 477–483. doi:10.1671/0272-4634(2001)021[0477:antftl]2.0.co;2. JSTOR 20061976. S2CID 131298010.
^ Hattori, S.; Kawabe, S.; Imai, T.; Shibata, M.; Miyata, K.; Xu, X.; Azuma, Y. (2021). "OSTEOLOGY OF FUKUIVENATOR PARADOXUS: A BIZARRE MANIRAPTORAN THEROPOD FROM THE EARLY CRETACEOUS OF FUKUI, JAPAN" (PDF). Memoir of the Fukui Prefectural Dinosaur Museum. 20: 1–82.
^ Maleev, E. A. (1954). "Новый черепахообразный ящер в Монголии" [New turtle like reptile in Mongolia]. Природа [Priroda] (in Russian) (3): 106−108. Translated paper.

[Wills23-1] Wills, S.; Underwood, C. J.; Barrett, P. M. (2023). "Machine learning confirms new records of maniraptoran theropods in Middle Jurassic UK microvertebrate faunas". Papers in Palaeontology. 9 (2). e1487. Bibcode:2023PPal....9E1487W. doi:10.1002/spp2.1487.

[A_New_Therizinosaur_from_the_Lower-2] Xu, X.; Zhao, X.; Clark, J. (2001). "A New Therizinosaur from the Lower Jurassic Lower Lufeng Formation of Yunnan, China". Journal of Vertebrate Paleontology. 21 (3): 477–483. doi:10.1671/0272-4634(2001)021[0477:antftl]2.0.co;2. JSTOR 20061976. S2CID 131298010.

[FukuivenatorMonograph2022-3] Hattori, S.; Kawabe, S.; Imai, T.; Shibata, M.; Miyata, K.; Xu, X.; Azuma, Y. (2021). "OSTEOLOGY OF FUKUIVENATOR PARADOXUS: A BIZARRE MANIRAPTORAN THEROPOD FROM THE EARLY CRETACEOUS OF FUKUI, JAPAN" (PDF). Memoir of the Fukui Prefectural Dinosaur Museum. 20: 1–82.

[Maleev1954-4] Maleev, E. A. (1954). "Новый черепахообразный ящер в Монголии" [New turtle like reptile in Mongolia]. Природа [Priroda] (in Russian) (3): 106−108. Translated paper.

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