Opisthocoelicaudiinae is a subfamily of titanosaurian dinosaurs from the Late Cretaceous. It was named by John McIntosh in 1990. Opisthocoelicaudiines are known from Mongolia, Argentina, and the United States. Two genera were assigned to Opisthocoelicaudiinae by Gonzalez et al. (2009): Alamosaurus and Opisthocoelicaudia (the type genus),[4] a conclusion also found by Díez Díaz et al. (2018).[3] The hands of opisthocoelicaudiines lacked wrist bones and phalanges.[5]
It was suggested by Averianov and Lopatin in 2022 that Opisthocoelicaudia was not in fact closely related to Saltasaurus, and instead to Nemegtosaurus and Quaesitosaurus, which are both also Laurasian, as well as isolated teeth from the Turonian of Uzbekistan and the Santonian of Kazakhstan. Suggesting a more distant relationship to Saltasaurus, Averianiov and Lopatin suggested using the clade name Opisthocoelicaudiidae for the group, limiting Saltasauridae to Gondwanan taxa.[2]
Opisthocoelicaudiinae in a cladogram after Navarro et al., 2022:[6]
Saltasauridae
Opisthocoelicaudiinae
Opisthocoelicaudia
Nemegtosaurus
Saltasaurinae
Alamosaurus
Baurutitan
Ibirania
Bonatitan
Rocasaurus
Saltasaurini
Neuquensaurus
MACN-PV-RN 233
Saltasaurus
^Villa, B.; Sellés, A.; Moreno-Azanza, M.; Razzolini, N.L.; Gil-Delgado, A.; Canudo, J.I.; Galobart, À (2022). "A titanosaurian sauropod with Gondwanan affinities in the latest Cretaceous of Europe". Nature Ecology & Evolution. 92 (3): 288–296. Bibcode:2022NatEE...6..288V. doi:10.1038/s41559-021-01651-5. PMID 35132183. S2CID 246650381.
^ abcAverianov, A.O.; Lopatin, A.V. (2022). "New Data on Late Cretaceous Sauropods from the Bostobe Formation of the Northeastern Aral Sea Region (Kazakhstan)". Doklady Earth Sciences. 503 (1): 97–99. Bibcode:2022DokES.503...97A. doi:10.1134/S1028334X22030047. S2CID 248378228.
^ abDíez Díaz, V.; Garcia, G.; Pereda-Suberbiola, X.; Jentgen-Ceschino, B.; Stein, K.; Godefroit, P.; Valentin, X. (2018). "The titanosaurian dinosaur Atsinganosaurus velauciensis (Sauropoda) from the Upper Cretaceous of southern France: New material, phylogenetic affinities, and palaeobiogeographical implications". Cretaceous Research. 91: 429–456. Bibcode:2018CrRes..91..429D. doi:10.1016/j.cretres.2018.06.015. S2CID 134977876.
^González Riga, Bernardo J.; Previtera, Elena; Pirrone, Cecilia A. (2009). "Malarguesaurus florenciae gen. et sp. nov., a new titanosauriform (Dinosauria, Sauropoda) from the Upper Cretaceous of Mendoza, Argentina". Cretaceous Research. 30 (1): 135–148. Bibcode:2009CrRes..30..135G. doi:10.1016/j.cretres.2008.06.006.
^Tidwell, Virginia; Carpenter, Kenneth (2005). Thunder-Lizards: The Sauropodomorph Dinosaurs. Bloomington, Indiana: Indiana University Press. p. 339. ISBN 0-253-34542-1. Retrieved April 6, 2010.
^Navarro, Bruno A.; Ghilardi, Aline M.; Aureliano, Tito; Díaz, Verónica Díez; Bandeira, Kamila L. N.; Cattaruzzi, André G. S.; Iori, Fabiano V.; Martine, Ariel M.; Carvalho, Alberto B.; Anelli, Luiz E.; Fernandes, Marcelo A.; Zaher, Hussam (2022-09-15). "A new nanoid titanosaur (Dinosauria: Sauropoda) from the Upper Cretaceous of Brazil". Ameghiniana. 59 (5): 317–354. doi:10.5710/AMGH.25.08.2022.3477. ISSN 1851-8044. S2CID 251875979.
and 30 Related for: Opisthocoelicaudiinae information
Opisthocoelicaudiinae is a subfamily of titanosaurian dinosaurs from the Late Cretaceous. It was named by John McIntosh in 1990. Opisthocoelicaudiines...
all taxa like previous authors. Opisthocoelicaudia was placed in Opisthocoelicaudiinae within Camarasauridae, following its original description and not...
analysis unites Alamosaurus with Opisthocoelicaudia in the subgroup Opisthocoelicaudiinae of Saltasauridae. A major competing analysis finds Alamosaurus as...
displayed in the following cladograms: Isisaurus was placed within Opisthocoelicaudiinae by Curry-Rogers in 2005. The cladogram below follows Zaher et al...
anteroventral side, as well as a lip where they meet the infraglenoid. The Opisthocoelicaudiinae, a subfamily of the saltasaurids, are unique in that they lack phalanges...
possibility that Opisthocoelicauda is a junior synonym. Consequently, Opisthocoelicaudiinae would be a junior synonym of Nemegtosauridae. In 2019, Alexander...
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