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?[4]
†Falcarius
†Fukuivenator?[5]
†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 found across the Middle Jurassic to Late Cretaceous deposits in Europe,[1] Asia and North America. 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')[6] and σαῦρος (saûros, 'lizard'). The older representative, Segnosaurus, is derived from the Latin sēgnis ('slow') and the Greek σαῦρος.
^ abWills, 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.
^Joeckel, R. M.; Ludvigson, G. A.; Möller, A.; Hotton, C. L.; Suarez, M. B.; Suarez, C. A.; Sames, B.; Kirkland, J. I.; Hendrix, B. (2020). "Chronostratigraphy and terrestrial palaeoclimatology of Berriasian–Hauterivian strata of the Cedar Mountain Formation, Utah, USA". Geological Society, London, Special Publications. 498 (1): 75–100. Bibcode:2020GSLSP.498...75J. doi:10.1144/SP498-2018-133. S2CID 210296827.
^Buck, B. J.; Hanson, A. D.; Hengst, R. A.; Shu-sheng, H. (2004). "Tertiary Dinosaurs in the Nanxiong Basin, Southern China, Are Reworked from the Cretaceous". The Journal of Geology. 112 (1): 111−118. Bibcode:2004JG....112..111B. doi:10.1086/379695. S2CID 12866840.
^ abXu, 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.
the first ever cladogram showing the evolutionary relationships of Therizinosauria, and demonstrated that Beipiaosaurus had features of more basal theropods...
of the last and the largest representative of its unique group, the Therizinosauria (formerly known as Segnosauria; the segnosaurs). During and after its...
subgroups Avialae, Dromaeosauridae, Troodontidae, Oviraptorosauria, and Therizinosauria. Ornitholestes and the Alvarezsauroidea are also often included. Together...
Cretaceous of China in 1999, helped clarify the early evolution of the Therizinosauria and its relationships within the larger group of Theropoda. The remains...
association with the holotype individual, therefore it should be assigned to Therizinosauria incertae sedis; the other remains might pertain to the holotype. A...
phylogenetic analysis of coelurosaurian theropods. Russell coined the name Therizinosauria for the wider group in 1997. In 1999, Xing Xu and colleagues described...
below is the result of the performed phylogenetic analysis of the Therizinosauria by Hartman et al. 2019 which is largely based on the data provided...
forelimbs) †Alvarezsauridae (insectivores with only one enlarged digit) †Therizinosauria (tall, long-necked theropods; omnivores and herbivores) †Therizinosauroidea...
following year, Barsbold and Perle coined the family Segnosauria (now Therizinosauria) to contain the Segnosauridae and kin. Also, they named and briefly...
insectivores with reduced forelimbs each bearing one enlarged claw) †Therizinosauria (bipedal herbivores with large hand claws and small heads) †Scansoriopterygidae...
Lindsay E. Zanno performed a large and comprehensive analysis of the Therizinosauria. The cladistic analysis performed recovered both N. mckinleyi and N...
and less derived than therizinosaurids. On the large revision of the Therizinosauria performed by Lindsay Zanno in 2010, she found Suzhousaurus in a more...
Zanno, L. E. (2010). "A taxonomic and phylogenetic re-evaluation of Therizinosauria (Dinosauria: Maniraptora)". Journal of Systematic Palaeontology. 8...
older name Therizinosauridae. Segnosauria also became synonymous with Therizinosauria. In 1997, with the description and naming of "N". bohlini, Dong and...
birds. They found that the oviraptorosaurs are the sister group to the Therizinosauria and that the two, together, are more basal than any member of Paraves...
Zanno, L. E. (2010). "A taxonomic and phylogenetic re-evaluation of Therizinosauria (Dinosauria: Maniraptora)". Journal of Systematic Palaeontology. 8...
Zanno, L. E. (2010). "A taxonomic and phylogenetic re-evaluation of Therizinosauria (Dinosauria: Maniraptora)". Journal of Systematic Palaeontology. 8...
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