List of South American dinosaurs

| 1985

| Anacleto Formation (Late Cretaceous, Campanian)

| {{flag|Argentina}}

| Only known from a single partial skull

| 200px

| 2007

| Bajo de la Carpa Formation (Late Cretaceous, Santonian)

| {{flag|Argentina}}

| Potentially a junior synonym of Alvarezsaurus{{Cite journal|last1=Makovicky|first1=P.J.|last2=Apesteguía|first2=S.N.|last3=Gianechini|first3=F.A.|date=2012|title=A New Coelurosaurian Theropod from the La Buitrera Fossil Locality of Río Negro, Argentina|url=https://bioone.org/journals/Fieldiana-Life-and-Earth-Sciences/volume-2012/issue-5/2158-5520-5.1.90/A-New-Coelurosaurian-Theropod-from-the-La-Buitrera-Fossil-Locality/10.3158/2158-5520-5.1.90.full|journal=Fieldiana Life and Earth Sciences|volume=5|pages=90–98|doi=10.3158/2158-5520-5.1.90|s2cid=129758444}}

| 200px

| 2006

| Adamantina Formation (Late Cretaceous, Turonian to Maastrichtian)

| {{flag|Brazil}}

| Derived for a titanosaur as indicated by the ball-and-socket articulations of its caudal vertebrae

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| 2009

| Cañón del Colorado Formation (Early Jurassic, Hettangian to Pliensbachian)

| {{flag|Argentina}}

| May have had a keratinous beak based on the shape of its jaw bones

| 200px

| 1987

| Allen Formation?, Angostura Colorada Formation, Lago Colhué Huapí Formation, Los Alamitos Formation?, Serra da Galga Formation? (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Argentina}}
{{flag|Brazil}}?

| Known from the remains of several individuals

| 200px

| 2009

| Anacleto Formation (Late Cretaceous, Campanian)

| {{flag|Argentina}})

| Its bones were extensively pneumatized, suggesting an air sac system like those of modern birds

| 200px

| 1999

| Lohan Cura Formation (Early Cretaceous, Aptian to Albian)

| {{flag|Argentina}}

| Originally described as possessing long, vaguely stegosaur-like spikes, although these turned out to be fragments of ribs and other bones{{cite journal | first1 = F. | last1 = Bellardini | first2 = I.A. | last2 = Cerda | journal = The Science of Nature | title = Bone histology sheds light on the nature of the "dermal armor" of the enigmatic sauropod dinosaur Agustinia ligabuei Bonaparte, 1999 | volume = 104 | issue = 1 | date = 2017 | page = 1 | doi = 10.1007/s00114-016-1423-7 | pmid = 27942797 | bibcode = 2017SciNa.104....1B | s2cid = 21654124 }}

| 200px

| 2012

| Candeleros Formation (Late Cretaceous, Cenomanian)

| {{flag|Argentina}}

| The oldest alvarezsauroid known from South America

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| 1991

| Bajo de la Carpa Formation (Late Cretaceous, Santonian)

| {{flag|Argentina}}

| One of the largest known alvarezsaurids

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| 1991

| La Amarga Formation (Early Cretaceous, Barremian to Aptian)

| {{flag|Argentina}}

| Possessed two parallel rows of backward-pointing spines on its neck that may have been covered by keratin sheaths{{Cite journal| volume = 8| last = Paul| first = G. S.| title = Dinosaur art & restoration notes: Dicraeosaurs| journal = The Dinosaur Report| date = 1994| url = http://gspauldino.com/DinoArtDicraeosaurs.pdf| access-date = February 22, 2019| archive-date = March 16, 2021| archive-url = https://web.archive.org/web/20210316180856/http://www.gspauldino.com/DinoArtDicraeosaurs.pdf| url-status = live}} or a skin sail{{Cite journal |last1=Cerda |first1=Ignacio A. |last2=Novas |first2=Fernando E. |last3=Carballido |first3=José Luis |last4=Salgado |first4=Leonardo |date=2022-03-24 |title=Osteohistology of the hyperelongate hemispinous processes of Amargasaurus cazaui (Dinosauria: Sauropoda): Implications for soft tissue reconstruction and functional significance |journal=Journal of Anatomy |volume=240 |issue=6 |language=en |pages=1005–1019 |doi=10.1111/joa.13659 |pmid=35332552 |pmc=9119615 |s2cid=247677750 |issn=0021-8782}}

| 200px

| 2007

| La Amarga Formation (Early Cretaceous, Barremian to Aptian)

| {{flag|Argentina}}

| Originally described as a titanosaur{{cite journal |last=Apesteguía |first=Sebastián |year=2007 |title=The sauropod diversity of the La Amarga Formation (Barremian), Neuquén (Argentina) |journal=Gondwana Research |volume=12 |issue=4 |pages=533–546 |doi=10.1016/j.gr.2007.04.007|bibcode=2007GondR..12..533A }} although it has since been reinterpreted as a dicraeosaurid{{cite journal | last1 = Gallina | first1 = Pablo Ariel | year = 2016 | title = Reappraisal Of The Early Cretaceous Sauropod Dinosaur Amargatitanis macni (Apesteguía, 2007), From Northwestern Patagonia, Argentina |journal= Cretaceous Research | volume = 64| pages = 79–87 |doi= 10.1016/j.cretres.2016.04.002 | bibcode = 2016CrRes..64...79G |url= https://www.researchgate.net/publication/300420946 | hdl = 11336/43971 | hdl-access = free }}

| 200px

| 2003

| Itapecuru Formation (Early Cretaceous, Aptian to Albian)

| {{flag|Brazil}}

| Had tall neural spines on its caudal vertebrae

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| 1947

| Cerro Carnerero Formation (Early Jurassic, Toarcian)

| {{flag|Argentina}}

| Its teeth were shaped like almonds

| 200px

| 2002

| Lisandro Formation (Late Cretaceous, Cenomanian to Turonian)

| {{flag|Argentina}}

| Four specimens are known but the skull remains incompletely known

| 200px

| 1991

| Candeleros Formation (Late Cretaceous, Cenomanian)

| {{flag|Argentina}}

| Several osteological features indicate a basal position within the Titanosauria

| 200px

| 2006

| Bajo Barreal Formation (Late Cretaceous, Cenomanian to Turonian)

| {{flag|Argentina}}

| Bone bed remains suggest a gregarious lifestyle{{Cite journal | last1 = Ibiricu | first1 = L. M. | last2 = Martínez | first2 = R. N. D. | last3 = Casal | first3 = G. A. | last4 = Cerda | first4 = I. A. | editor1-last = Butler | editor1-first = Richard J | title = The Behavioral Implications of a Multi-Individual Bonebed of a Small Theropod Dinosaur | doi = 10.1371/journal.pone.0064253 | journal = PLOS ONE | volume = 8 | issue = 5 | pages = e64253 | year = 2013 | pmid = 23691183| pmc = 3655058| bibcode = 2013PLoSO...864253I | doi-access = free }}

| 200px

| 1929

| Adamantina Formation?, Anacleto Formation, Plottier Formation? (Late Cretaceous, Coniacian? to Campanian)

| {{flag|Argentina}}
{{flag|Brazil}}?

| Multiple specimens have been assigned to this genus, including some from outside South America, but most may not represent the same taxon

| 200px

| 2016

| Huincul Formation (Late Cretaceous, Cenomanian to Turonian)

| {{flag|Argentina}}

| Mostly recovered as a megaraptoran{{Cite journal|last1=Rolando|first1=Mauro Aranciaga|last2=Marsà|first2=Jordi Garcia|last3=Novas|first3=Fernando|date=2020|title=Histology and pneumaticity of Aoniraptor libertatem (Dinosauria, Theropoda), an enigmatic mid-sized megaraptoran from Patagonia|url= |journal=Journal of Anatomy|language=en|volume=237|issue=4|pages=741–756|doi=10.1111/joa.13225|issn=1469-7580|pmc=7495275|pmid=32470191}} but a recent study recovers this genus as a relative of the enigmatic theropod Bahariasaurus{{Cite journal |last=Cau |first=Andrea |date=2024 |title=A Unified Framework for Predatory Dinosaur Macroevolution |url=https://www.paleoitalia.it/wp-content/uploads/2024/05/01_Cau_2024_BSPI_631.pdf |journal=Bollettino della Società Paleontologica Italiana |volume=63 |issue=1 |pages=1–19 |doi=10.4435/BSPI.2024.08 |doi-broken-date=2024-11-20 |issn=0375-7633}}

| 200px

| 2021

| Hornitos Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Chile}}

| The most complete sauropod known from Chile

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| 2020

| Romualdo Formation (Early Cretaceous, Aptian)

| {{flag|Brazil}}

| All three of its toes were symmetric

| 200px

| 1993

| Huincul Formation (Late Cretaceous, Cenomanian to Turonian)

| {{flag|Argentina}}

| May be the largest known dinosaur

| 200px

| 1893

| Lago Colhué Huapí Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Argentina}}

| Several remains were historically assigned to this genus, but only the holotype can be confidently assigned to it{{cite journal|last1=Mannion|first1=P. D.|last2=Otero|first2=A.|year=2012|title=A reappraisal of the Late Cretaceous Argentinean sauropod dinosaur Argyrosaurus superbus, with a description of a new titanosaur genus|journal=Journal of Vertebrate Paleontology|volume=32|issue=3|pages=614–618|doi=10.1080/02724634.2012.660898|bibcode=2012JVPal..32..614M |s2cid=86762374|hdl=11336/197194|hdl-access=free}}

| 200px

| 2021

| Adamantina Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Brazil}}

| Its tail probably curved strongly downwards, with the tip held very low to the ground{{Cite journal| doi = 10.1080/08912963.2020.1745791| pages = 1836–1856| last1 = Vidal| first1 = Luciano da Silva| last2 = Pereira| first2 = Paulo Victor Luiz Gomes da Costa| last3 = Tavares| first3 = Sandra| last4 = Brusatte| first4 = Stephen L.| last5 = Bergqvist| first5 = Lílian Paglarelli| last6 = Candeiro| first6 = Carlos Roberto dos Anjos| title = Investigating the enigmatic Aeolosaurini clade: the caudal biomechanics of Aeolosaurus maximus (Aeolosaurini/Sauropoda) using the neutral pose method and the first case of protonic tail condition in Sauropoda| journal = Historical Biology| year = 2020 | volume = 33| issue = 9| s2cid = 218822392}}

| 200px

| 2019

| Cañadón Asfalto Formation (Early Jurassic, Toarcian)

| {{flag|Argentina}}

| Combines traits of both megalosauroids and allosauroids. Its describers suggest paraphyly of the former group{{Cite journal|last1=Rauhut|first1=Oliver W. M.|last2=Pol|first2=Diego|date=2019-12-11|title=Probable basal allosauroid from the early Middle Jurassic Cañadón Asfalto Formation of Argentina highlights phylogenetic uncertainty in tetanuran theropod dinosaurs|journal=Scientific Reports|language=en|volume=9|issue=1|pages=18826|doi=10.1038/s41598-019-53672-7|pmid=31827108|pmc=6906444|bibcode=2019NatSR...918826R|issn=2045-2322}}

| 200px

| 2011

| Tolar Formation (Late Cretaceous, Cenomanian to Maastrichtian)

| {{flag|Chile}}

| Only known from a single, fragmentary skeleton

| 200px

| 2002

| Anacleto Formation (Late Cretaceous, Santonian to Campanian)

| {{flag|Argentina}}

| Known from almost the entire skeleton, including most of the skull

| 200px

| 2010

| Cerro Fortaleza Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Argentina}}

| Initially described as an abelisauroid but this has been disputed by subsequent research{{Cite journal | author = Oliver W.M. Rauhut | year = 2012 | title = A reappraisal of a putative record of abelisauroid theropod dinosaur from the Middle Jurassic of England | journal = Proceedings of the Geologists' Association | volume = 123 | issue = 5| pages = 779–786| doi =10.1016/j.pgeola.2012.05.008 | bibcode = 2012PrGA..123..779R }}

| 200px

| 2016

| Presidente Prudente Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Brazil}}

| The largest dinosaur known from Brazil

| 200px

| 2008

| Allen Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Argentina}}

| Possessed an elongated snout paralleling that of spinosaurids

| 200px

| 2018

| Portezuelo Formation (Late Cretaceous, Turonian to Coniacian)

| {{flag|Argentina}}

| Had a squared-off dentary with its teeth crowded to the front

| 200px

| 2020

| Cañadón Asfalto Formation (Early Jurassic, Toarcian)

| {{flag|Argentina}}

| Represents an early radiation of eusauropods that displaced earlier basal sauropodomorphs after a global warming event{{cite journal |author1=D. Pol |author2=J. Ramezani |author3=K. Gomez |author4=J. L. Carballido |author5=A. Paulina Carabajal |author6=O. W. M. Rauhut |author7=I. H. Escapa |author8=N. R. Cúneo |year=2020 |title=Extinction of herbivorous dinosaurs linked to Early Jurassic global warming event |journal=Proceedings of the Royal Society B: Biological Sciences |volume=287 |issue=1939 |pages=Article ID 20202310 |doi=10.1098/rspb.2020.2310 |pmid=33203331 |pmc=7739499 |s2cid=226982302 |doi-access=free }}

| 200px

| 2018

| Santa Maria Formation (Late Triassic, Carnian)

| {{flag|Brazil}}

| Its hindlimbs were very robust

| 200px

| 2019

| Bajada Colorada Formation (Early Cretaceous, Berriasian to Valanginian)

| {{flag|Argentina}}

| Possessed elongated, forward-pointing spines erupting in pairs from the neck

| 200px

| 2009

| Anacleto Formation (Late Cretaceous, Campanian)

| {{flag|Argentina}}

| Only known from three vertebrae but are well-preserved enough to warrant recognition as a distinct genus

| 200px

| 2005

| Serra da Galga Formation (Late Cretaceous, Maastrichtian)

| {{flag|Brazil}}

| Originally described from an associated series of nineteen vertebrae. New remains were discovered later{{cite journal |vauthors=Silva Junior JC, Martinelli AG, Marinho TS, da Silva JI, Langer MC |year=2022 |title=New specimens of Baurutitan britoi and a taxonomic reassessment of the titanosaur dinosaur fauna (Sauropoda) from the Serra da Galga Formation (Late Cretaceous) of Brazil |journal=PeerJ |volume=10 |at=e14333 |doi=10.7717/peerj.14333 |pmid=36405026 |pmc=9673870 |doi-access=free}}

| 200px

| 2021

| Goio-Erê Formation (Early Cretaceous, Aptian to Albian)

| {{flag|Brazil}}

| Possessed a short, toothless beak, indicating a herbivorous or omnivorous diet

| 200px

| 2012

| Candeleros Formation (Late Cretaceous, Cenomanian)

| {{flag|Argentina}}

| Several individuals were preserved together, suggesting a gregarious lifestyleNovas, F.E., Ezcurra, M.D., Agnolín, F.L., Pol, D. and Ortíz, R. (2012). "[https://revista.macn.gob.ar/ojs/index.php/RevMus/article/download/372/356 New Patagonian Cretaceous theropod sheds light about the early radiation of Coelurosauria]." Revista del Museo Argentino de Ciencias Naturales, nueva serie, 14: 57–81.

| 200px

| 2012

| Allen Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Argentina}}

| Its holotype was preserved with two eggs that may have been within its oviducts when it died{{cite journal | title=New alvarezsaurid (Dinosauria, Theropoda) from uppermost Cretaceous of north-western Patagonia with associated eggs | author=Federico L. Agnolin | author2=Jaime E. Powell | author3=Fernando E. Novas | author4=Martin Kundrát | name-list-style=amp | journal=Cretaceous Research |date=June 2012 | volume=35 | pages=33–56 | doi=10.1016/j.cretres.2011.11.014| bibcode=2012CrRes..35...33A }}

| 200px

| 2017

| Allen Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Argentina}}

| Belongs to the Austrokritosauria, a clade of hadrosaurids endemic to South America{{Cite journal |last1=Alarcón-Muñoz |first1=Jhonatan |last2=Vargas |first2=Alexander O. |last3=Püschel |first3=Hans P. |last4=Soto-Acuña |first4=Sergio |last5=Manríquez |first5=Leslie |last6=Leppe |first6=Marcelo |last7=Kaluza |first7=Jonatan |last8=Milla |first8=Verónica |last9=Gutstein |first9=Carolina S. |last10=Palma-Liberona |first10=José |last11=Stinnesbeck |first11=Wolfgang |last12=Frey |first12=Eberhard |last13=Pino |first13=Juan Pablo |last14=Bajor |first14=Dániel |last15=Núñez |first15=Elaine |first16=Héctor |last16=Ortiz |first17=David |last17=Rubilar-Rogers |first18=Penélope |last18=Cruzado-Caballero |date=2023-06-16 |title=Relict duck-billed dinosaurs survived into the last age of the dinosaurs in subantarctic Chile |journal=Science Advances |language=en |volume=9 |issue=24 |pages=eadg2456 |doi=10.1126/sciadv.adg2456 |pmid=37327335 |issn=2375-2548 |pmc=10275600 |bibcode=2023SciA....9G2456A }}

| 200px

| 2004

| Allen Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Argentina}}

| Analysis of its inner ear suggests a decreased range of head movements compared to other sauropods{{Cite journal|last=Carabajal|first=Ariana Paulina|date=2012|title=Neuroanatomy of Titanosaurid Dinosaurs From the Upper Cretaceous of Patagonia, With Comments on Endocranial Variability Within Sauropoda|journal=The Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology|language=en|volume=295|issue=12|pages=2141–2156|doi=10.1002/ar.22572|pmid=22961834|s2cid=24555402|hdl=11336/197295|hdl-access=free}}

| 200px

| 2004

| Bajo de la Carpa Formation (Late Cretaceous, Santonian)

| {{flag|Argentina}}

| The proportions of its body were somewhat similar to those of diplodocoids, likely through convergent evolution

| 200px

| 2005

| Cañadón Calcáreo Formation (Late Jurassic, Oxfordian to Tithonian)

| {{flag|Argentina}}

| Possessed the shortest neck of any known sauropod

| 200px

| 2013

| Adamantina Formation (Late Cretaceous, Maastrichtian)

| {{flag|Brazil}}

| Had an L-shaped dentary similar to that of Antarctosaurus and Bonitasaura

| 200px

| 2020

| Ciénaga del Río Huaco Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Argentina}}

| Discovered close to a large concentration of titanosaur eggs

| 200px

| 2005

| Candeleros Formation (Late Cretaceous, Cenomanian to Turonian)

| {{flag|Argentina}}

| May have been a pursuit predator due to its long legs{{cite journal|last1=Gianechini|first1=F. A.|last2=Ercoli|first2=M. D.|last3=Díaz-Martinez|first3=I.|date=2020|title=Differential locomotor and predatory strategies of Gondwanan and derived Laurasian dromaeosaurids (Dinosauria, Theropoda, Paraves): Inferences from morphometric and comparative anatomical studies|journal=Journal of Anatomy|volume=236|issue=5|pages=772−797|doi=10.1111/joa.13153|pmc=7163733|pmid=32023660}}

| 200px

| 2016

| Santa Maria Formation (Late Triassic, Carnian)

| {{flag|Brazil}}

| Unlike all other sauropodomorphs, it was completely carnivorous, with serrated teeth to match

| 200px

| 2023

| Huincul Formation (Late Cretaceous, Cenomanian)

| {{flag|Argentina}}

| Large yet distantly related to other gigantic titanosaurs{{Cite journal |last1=Simón |first1=M. E. |last2=Salgado |first2=L. |year=2023 |title=A new gigantic titanosaurian sauropod from the early Late Cretaceous of Patagonia (Neuquén Province, Argentina) |journal=Acta Palaeontologica Polonica |doi=10.4202/app.01086.2023 |doi-access=free}}

| 200px

| 2022

| Serra da Galga Formation (Late Cretaceous, Maastrichtian)

| {{flag|Brazil}}

| Its caudal vertebrae had an unusual anatomy

| 200px

| 2024

| Candeleros Formation (Late Cretaceous, Cenomanian)

| {{flag|Argentina}}

| Had a notably pneumatized ilium{{Cite journal |last1=Lerzo |first1=Lucas N. |last2=Fernández-Baldor |first2=Fidel Torcida |last3=Canale |first3=Juan I. |last4=Whitlock |first4=John A. |last5=Otero |first5=Alejandro |last6=Gallina |first6=Pablo A. |date=2024-08-13 |title=They all floated in the Cretaceous: new rebbachisaurid (Sauropoda, Diplodocoidea) with a highly pneumatized skeleton from the Upper Cretaceous (lower Cenomanian) of Patagonia, Argentina |journal=Historical Biology |language=en |pages=1–14 |doi=10.1080/08912963.2024.2383708 |issn=0891-2963}}

| 200px

| 1961

| Bajo Barreal Formation (Late Cretaceous, Cenomanian)

| {{flag|Argentina}}

| Only known from a single maxilla with seven teeth

| 200px

| 1985

| La Colonia Formation (Late Cretaceous, Maastrichtian)

| {{flag|Argentina}}

| Possessed a pair of short horns on the top of its skull

| 200px

| 2005

| Huincul Formation (Late Cretaceous, Cenomanian)

| {{flag|Argentina}}

| Had a well-muscled neck although it could not move strongly up or down

| 200px

| 2025

| Anacleto Formation (Late Cretaceous, Campanian)

| {{flag|Argentina}}

| Represents a new fossil locality of the Anacleto Formation

| 200px

| 2024

| Huincul Formation (Late Cretaceous, Cenomanian to Turonian)

| {{flag|Argentina}}

| Known from various partial skeletons belonging to differently-aged individuals

| 200px

| 2015

| Toqui Formation (Late Jurassic, Tithonian)

| {{flag|Chile}}

| Combines traits of theropods, sauropodomorphs, and ornithischians, with far-reaching implications for the evolution of the Dinosauria

| 200px

| 2017

| Huincul Formation (Late Cretaceous, Cenomanian)

| {{flag|Argentina}}

| One of the most completely known basal titanosaurs

| 200px

| 2010

| Ischigualasto Formation (Late Triassic, Carnian)

| {{flag|Argentina}}

| Its discovery suggests that early dinosaurs were more diverse than previously thought

| 200px

| 1975

| Cerro Barcino Formation (Early Cretaceous, Albian)

| {{flag|Argentina}}

| Unusually, its forelimbs were shorter than its hindlimbsG. del Corro. 1975. Un nuevo sauropodo del Cretácico Superior. Actas del Primer Congreso Argentino de Paleontologia y Bioestratigrafia 2:229-240

| 200px

| 2023

| Huincul Formation (Late Cretaceous, Cenomanian to Turonian)

| {{flag|Argentina}}

| Smaller and more slender than the contemporary Argentinosaurus

| 200px

| 2025

| Huincul Formation (Late Cretaceous, Cenomanian to Turonian)

| {{flag|Argentina}}

| The fourth named rebbachisaurid from the Huincul Formation, suggesting a quick faunal turnover for this group

| 200px

| 1898

| Cerro Fortaleza Formation, Mata Amarilla Formation (Late Cretaceous, Cenomanian to Maastrichtian)

| {{flag|Argentina}}

| Similarly to Bonitasaura, its teeth were polygonal in cross-section

|

| 1990

| Los Colorados Formation (Late Triassic, Norian)

| {{flag|Argentina}}

| Originally called Coloradia, although that genus name is preoccupied by a moth

| 200px

| 2012

| Lohan Cura Formation (Early Cretaceous, Aptian to Albian)

| {{flag|Argentina}}

| Its holotype was originally assigned to Limaysaurus, but it was named as a separate genus due to several morphological differences

| 200px

| 2005

| Cañadón Asfalto Formation (Early Jurassic, Toarcian)

| {{flag|Argentina}}

| Closely related to the coeval Piatnitzkysaurus but could be distinguished by several osteological features

| 200px

| 2024

| Bajo de la Carpa Formation (Late Cretaceous, Santonian)

| {{flag|Argentina}}

| Only known from a humerus and fragmentary vertebrae

| 200px

| 2014

| Cerro Fortaleza Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Argentina}}

| The heaviest land animal whose mass can be calculated with reasonable certainty

| 200px

| 2011

| Bajo Barreal Formation (Late Cretaceous, Cenomanian to Turonian)

| {{flag|Argentina}}

| Potentially the oldest known member of the lognkosaurian lineage{{Cite journal|author=César Navarrete, Gabriel Casal and Rubén Martínez |year=2011 |title=Drusilasaura deseadensis gen. et sp. nov., a new titanosaur (Dinosauria-Sauropoda), of the Bajo Barreal Formation, Upper Cretaceous of north of Santa Cruz, Argentina |url=http://www.sbpbrasil.org/revista/edicoes/14_1/Artigo%201%20-%20Navarret%20et%20al.pdf |journal=Revista Brasileira de Paleontologia |volume=14 |issue=1 |pages=1–14 |doi=10.4072/rbp.2011.1.01 |doi-access=free }}

| 200px

| 2004

| Candeleros Formation (Late Cretaceous, Cenomanian)

| {{flag|Argentina}}

| Had robust bones, indicating a massive build and a greater resistance to injuries{{cite book |author1=Juárez Valieri, R.D. |author2=Porfiri, J.D. |author3=Calvo, J.O. |year=2011 |chapter=New information on Ekrixinatosaurus novasi Calvo et al. 2004, a giant and massively-constructed Abelisauroid from the "Middle Cretaceous" of Patagonia |chapter-url=https://www.researchgate.net/publication/275889284 |editor=Calvo |editor2=González |editor3=Riga |editor4=Porfiri |editor5=Dos Santos |title=Paleontología y dinosarios desde América Latina |pages=161–169 }}

| 200px

| 2012

| Bajo Barreal Formation (Late Cretaceous, Cenomanian to Turonian)

| {{flag|Argentina}}

| Extremely large as indicated by its long femur

| 200px

| 2022

| Portezuelo Formation (Late Cretaceous, Turonian to Coniacian)

| {{flag|Argentina}}

| The first abelisaurid known from the Turonian-Coniacian interval

| 200px

| 2025

| Mulichinco Formation (Early Cretaceous, Valanginian)

| {{flag|Argentina}}

| The oldest known rhabdodontomorph and the first one to be described from South America{{Cite journal|last1=Coria |first1=R. A. |last2=Cerda |first2=A. A. |last3=Escaso |first3=F. |last4=Baiano |first4=M. A. |last5=Bellardini |first5=F. |last6=Braun |first6=A. |last7=Coria |first7=L. M. |last8=Gutierrez |first8=J. M. |last9=Pino |first9=D. |last10=Windholz |first10=G. J. |last11=Currie |first11=P. J. |last12=Ortega |first12=F. |title=First Valanginian (Early Cretaceous) ornithopod (Dinosauria, Ornithischia) from Patagonia |year=2025 |journal=Cretaceous Research |volume=166 |at=106027 |doi=10.1016/j.cretres.2024.106027 }}

| 200px

| 2012

| Cañadón Asfalto Formation (Early Jurassic, Toarcian)

| {{flag|Argentina}}

| Shows a transitional arm morphology for an abelisauroid, with a shortened lower arm and hand, along with an unreduced humerus

| 200px

| 2011

| Ischigualasto Formation (Late Triassic, Carnian)

| {{flag|Argentina}}

| Well-adapted for cursoriality despite its early age{{Cite journal|last1=Kubo|first1=Tai|last2=Kubo|first2=Mugino O.|date=2012-06-01|title=Associated evolution of bipedality and cursoriality among Triassic archosaurs: a phylogenetically controlled evaluation|url=https://pubs.geoscienceworld.org/paleobiol/article-abstract/38/3/474/86594/Associated-evolution-of-bipedality-and|journal=Paleobiology|language=en|volume=38|issue=3|pages=474–485|doi=10.1666/11015.1|issn=0094-8373|jstor=41684613|bibcode=2012Pbio...38..474K |s2cid=85941954}}

| 200px

| 1993

| Ischigualasto Formation (Late Triassic, Carnian)

| {{flag|Argentina}}

| Possessed different types of teeth, suggesting it was omnivorous

| 200px

| 1990

| Bajo Barreal Formation (Late Cretaceous, Cenomanian to Turonian)

| {{flag|Argentina}}

| Its caudal vertebrae were procoelous, meaning they were concave at the front and convex at the back

| 200px

| 2021

| Candelária Formation (Late Triassic, Carnian to Norian)

| {{flag|Brazil}}

| Known from the Riograndia Assemblage Zone, an area which is unusually dominated by cynodonts

| 200px

| 2007

| Portezuelo Formation (Late Cretaceous, Coniacian)

| {{flag|Argentina}}

| Possessed meter-deep cervical vertebrae with distinctive shark fin-shaped neural spines

| 200px

| 1996

| Anacleto Formation (Late Cretaceous, Campanian)

| {{flag|Argentina}}

| Known from specimens of both adults and juveniles

| 200px

| 1901

| Cerro Barcino Formation (Early Cretaceous, Aptian to Albian)

| {{flag|Argentina}}

| Had extremely large and protruding teeth

| 200px

| 1995

| Candeleros Formation (Late Cretaceous, Cenomanian)

| {{flag|Argentina}}

| One of the largest known terrestrial carnivorous dinosaurs

| 200px

| 2019

| Santa Maria Formation (Late Triassic, Carnian)

| {{flag|Brazil}}

| Known from a well-preserved, almost complete skeleton

| 200px

| 1999

| Adamantina Formation, Cambabe Formation? (Late Cretaceous, Maastrichtian)

| {{flag|Brazil}}

| For a titanosaur, it had relatively gracile limb bones

| 200px

| 2023

| Dorotea Formation (Late Cretaceous, Maastrichtian)

| {{flag|Chile}}

| The southernmost basal hadrosauroid known to date. Known from more southern latitudes than true hadrosaurids

| 200px

| 1999

| Caturrita Formation (Late Triassic, Norian)

| {{flag|Brazil}}

| Combines features of both early theropods and sauropodomorphs

| 200px

| 2016

| Huincul Formation (Late Cretaceous, Cenomanian to Turonian)

| {{flag|Argentina}}

| Originally described as having highly reduced arms with only two fingers, convergent with tyrannosaurids, although one study suggests that a third finger was present{{Cite journal|last1=Ibrahim|first1=Nizar|author-link=Nizar Ibrahim|last2=Sereno|first2=Paul C.|last3=Varricchio|first3=David J.|last4=Martill|first4=David M.|last5=Dutheil|first5=Didier B.|last6=Unwin|first6=David M.|last7=Baidder|first7=Lahssen|last8=Larsson|first8=Hans C. E.|last9=Zouhri|first9=Samir|last10=Kaoukaya|first10=Abdelhadi|date=2020-04-21|title=Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco|url=https://zookeys.pensoft.net/article/47517/|journal=ZooKeys|language=en|issue=928|pages=1–216|doi=10.3897/zookeys.928.47517|pmid=32362741|pmc=7188693|issn=1313-2970|doi-access=free|bibcode=2020ZooK..928....1I }}

| 200px

| 2022

| Los Blanquitos Formation (Late Cretaceous, Campanian)

| {{flag|Argentina}}

| Unlike other abelisaurids, it lacked any ornamentation on its skull{{Cite journal |last1=Agnolín |first1=Federico L. |last2=Cerroni |first2=Mauricio A. |last3=Scanferla |first3=Agustín |last4=Goswami |first4=Anjali |last5=Paulina-Carabajal |first5=Ariana |last6=Halliday |first6=Thomas |last7=Cuff |first7=Andrew R. |last8=Reuil |first8=Santiago |date=2022-02-10 |title=First definitive abelisaurid theropod from the Late Cretaceous of Northwestern Argentina |url=https://doi.org/10.1080/02724634.2021.2002348 |journal=Journal of Vertebrate Paleontology |volume=41 |issue=4 |pages=e2002348 |doi=10.1080/02724634.2021.2002348 |issn=0272-4634 |s2cid=246766133}}

| 200px

| 1963

| Ischigualasto Formation (Late Triassic, Carnian)

| {{flag|Argentina}}

| One of the largest early carnivorous dinosaurs. Usually considered a basal saurischian but may be just outside the Dinosauria{{Cite journal|author=Andrea Cau |year=2018 |title=The assembly of the avian body plan: a 160-million-year long process |journal=Bollettino della Società Paleontologica Italiana |volume=57 |issue=1 |pages=1–25 |doi=10.4435/BSPI.2018.01 |doi-broken-date=2024-11-20 |url=http://paleoitalia.org/media/u/archives/01_Cau_2018_BSPI_571.pdf |archive-url=https://web.archive.org/web/20180505065903/http://paleoitalia.org/media/u/archives/01_Cau_2018_BSPI_571.pdf |url-status=usurped |archive-date=May 5, 2018 }}

| 200px

| 2022

| Los Alamitos Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Argentina}}

| Remains originally misidentified as belonging to a southern species of Kritosaurus

| 200px

| 2020

| Huincul Formation (Late Cretaceous, Cenomanian to Turonian)

| {{flag|Argentina}}

| The youngest known elaphrosaurine

| 200px

| 2022

| São José do Rio Preto Formation (Late Cretaceous, Santonian to Campanian)

| {{flag|Brazil}}

| May have attained its small size due to its arid inland habitat, unlike other dwarf titanosaurs which were affected by insular dwarfism{{Cite journal |last1=Navarro |first1=Bruno A. |last2=Ghilardi |first2=Aline M. |last3=Aureliano |first3=Tito |last4=Díaz |first4=Verónica Díez |last5=Bandeira |first5=Kamila L. N. |last6=Cattaruzzi |first6=André G. S. |last7=Iori |first7=Fabiano V. |last8=Martine |first8=Ariel M. |last9=Carvalho |first9=Alberto B. |last10=Anelli |first10=Luiz E. |last11=Fernandes |first11=Marcelo A. |last12=Zaher |first12=Hussam |date=2022-09-15 |title=A new nanoid titanosaur (Dinosauria: Sauropoda) from the Upper Cretaceous of Brazil |url=https://www.researchgate.net/publication/362978138 |journal=Ameghiniana |language=en |volume=59 |issue=5 |pages=317–354 |doi=10.5710/AMGH.25.08.2022.3477 |s2cid=251875979 |issn=1851-8044}}

| 200px

| 1998

| Huincul Formation (Late Cretaceous, Cenomanian)

| {{flag|Argentina}}

| Its skull retains some basal abelisauroid traits

| 200px

| 2024

| Bajo de la Carpa Formation (Late Cretaceous, Santonian)

| {{flag|Argentina}}

| Possessed a short neck and squared-off snout, convergent with the rebbachisaurids that went extinct shortly before this genus lived

| 200px

| 2018

| Quebrada del Barro Formation (Late Triassic, Norian to Rhaetian)

| {{flag|Argentina}}

| One of the earliest known very large sauropodomorphs{{Cite journal |last1=Apaldetti |last2=Martínez |first2=Ricardo N. |last3=Cerda |first3=Ignatio A. |last4=Pol |first4=Diego |last5=Alcober |first5=Oscar |year=2018 |title=An early trend towards gigantism in Triassic sauropodomorph dinosaurs |journal=Nature Ecology & Evolution |volume=2 |issue=8 |pages=1227–1232 |doi=10.1038/s41559-018-0599-y|hdl=11336/89332 |pmid=29988169|bibcode=2018NatEE...2.1227A |s2cid=49669597 |hdl-access=free }}

| 200px

| 1996

| Romualdo Formation (Early Cretaceous, Albian)

| {{flag|Brazil}}

| May have been the apex predator of its habitat, hunting both aquatic and terrestrial prey{{Cite journal|last1=Aureliano|first1=Tito|last2=Ghilardi|first2=Aline M.|last3=Buck|first3=Pedro V.|last4=Fabbri|first4=Matteo|last5=Samathi|first5=Adun|last6=Delcourt|first6=Rafael|last7=Fernandes|first7=Marcelo A.|last8=Sander|first8=Martin|date=May 3, 2018|title=Semi-aquatic adaptations in a spinosaur from the Lower Cretaceous of Brazil|url=http://osf.io/mjt95/|journal=Cretaceous Research|volume=90|pages=283–295|doi=10.1016/j.cretres.2018.04.024|bibcode=2018CrRes..90..283A |s2cid=134353898|issn=0195-6671}}

| 200px

| 2017

| Los Molles Formation (Middle Jurassic, Bajocian)

| {{flag|Argentina}}

| Preserves gut contents including whole seeds

| 200px

| 2019

| Chorrillo Formation (Late Cretaceous, Maastrichtian)

| {{flag|Argentina}}

| Four individuals of different ages were found together, suggesting it lived in herdsNovas, F., Agnolin, F., Rozadilla, S., Aranciaga-Rolando, A., Brissón-Eli, F., Motta, M., Cerroni, M., Ezcurra, M., Martinelli, A., D'Angelo, J., Álvarez-Herrera, G., Gentil, A., Bogan, S., Chimento, N., García-Marsà, J., Lo Coco, G., Miquel, S., Brito, F., Vera, E., Loinaze, V., Fernandez, M., & Salgado, L. (2019). [http://revista.macn.gob.ar/ojs/index.php/RevMus/article/view/655 Paleontological discoveries in the Chorrillo Formation (upper Campanian-lower Maastrichtian, Upper Cretaceous), Santa Cruz Province, Patagonia, Argentina]. Revista del Museo Argentino de Ciencias Naturales, 21(2), 217-293.

| 200px

| 2019

| Alcântara Formation (Late Cretaceous, Cenomanian)

| {{flag|Brazil}}

| The holotype is known from six vertebrae

| 200px

| 2022

| Candeleros Formation (Late Cretaceous, Cenomanian)

| {{flag|Argentina}}

| May represent a novel lineage of ornithischians characterized by small size, deep jaws and a bipedal stance

| 200px

| 2019

| Sierra Barrosa Formation (Late Cretaceous, Coniacian)

| {{flag|Argentina}}

| One of the latest-surviving basal titanosaurs

|

| 2013

| Bajo Barreal Formation (Late Cretaceous, Cenomanian to Turonian)

| {{flag|Argentina}}

| Distinguished by a certain opening in its dorsal vertebrae

| 200px

| 2022

| Allen Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Argentina}}

| Known from the remains of various individuals

| 200px

| 2024

| La Colonia Formation (Late Cretaceous, Maastrichtian)

| {{flag|Argentina}}

| Contemporary with its larger relative Carnotaurus

| 200px

| 2021

| Marília Formation (Late Cretaceous, Maastrichtian)

| {{flag|Brazil}}

| Would have had a stiff tail as indicated by the anatomy of its caudal vertebrae

| 200px

| 2020

| Mulichinco Formation (Early Cretaceous, Valanginian)

| {{flag|Argentina}}

| One of the smallest known allosauroids

| 200px

| 2012

| Allen Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Argentina}}

| Known from a partial skeleton lacking the skull

|

| 1929

| Anacleto Formation (Late Cretaceous, Campanian)

| {{flag|Argentina}}

| Osteoderms have been assigned to this taxon although this referral is uncertain

| 200px

| 2014

| La Quinta Formation (Early Jurassic, Hettangian)

| {{flag|Venezuela}}

| One study recovered it as a basal thyreophoranMatthew G. Baron; David B. Norman; Paul M. Barrett (2016). "Postcranial anatomy of Lesothosaurus diagnosticus (Dinosauria: Ornithischia) from the Lower Jurassic of southern Africa: implications for basal ornithischian taxonomy and systematics". Zoological Journal of the Linnean Society. in press. {{doi|10.1111/zoj.12434}} despite the fact no osteoderms have been found

| 200px

| 2018

| Rayoso Formation (Early Cretaceous, Aptian to Albian)

| {{flag|Argentina}}

| May have possessed a keratinous beak{{Cite journal|last1=Canudo|first1=José|last2=Carballido|first2=Jose|last3=Garrido|first3=Alberto|last4=Salgado|first4=Leonardo|date=2018|title=A new rebbachisaurid sauropod from the Aptian–Albian, Lower Cretaceous Rayoso Formation, Neuquén, Argentina|journal=Acta Palaeontologica Polonica|language=en|volume=63|doi=10.4202/app.00524.2018|issn=0567-7920|doi-access=free|hdl=11336/88390|hdl-access=free}}

| 200px

| 2014

| Bajada Colorada Formation (Early Cretaceous, Berriasian to Valanginian)

| {{flag|Argentina}}

| The youngest known diplodocid

| 200px

| 2011

| Las Leoneras Formation (Early Jurassic, Sinemurian to Toarcian)

| {{flag|Argentina}}

| Has an unusual combination of basal and derived traits

| 200px

| 1999

| Los Colorados Formation (Late Triassic, Norian)

| {{flag|Argentina}}

| Grew very large despite lacking the anatomical traits usually seen as a support for gigantism

| 200px

| 2011

| Quebrada del Barro Formation (Early Jurassic, Hettangian to Toarcian)

| {{flag|Argentina}}

| Had an unusually small skull

| 200px

| 1996

| La Amarga Formation (Early Cretaceous, Barremian to Aptian)

| {{flag|Argentina}}

| Known from a single, very small skeleton belonging to a juvenile animal

|

| 2006

| Lohan Cura Formation (Early Cretaceous, Aptian to Albian)

| {{flag|Argentina}}

| Its forelimbs were extremely long, with similar proportions to those of brachiosauridsJosé F. Bonaparte, Bernardo J. González Riga and Sebastián Apesteguía 2006. Ligabuesaurus leanzai gen. et sp. nov. (Dinosauria, Sauropoda), a new titanosaur from the Lohan Cura Formation (Aptian, Lower Cretaceous) of Neuquén, Patagonia, Argentina. Cretaceous Research 27(3): 364–376.

| 200px

| 2004

| Candeleros Formation, Huincul Formation (Late Cretaceous, Cenomanian)

| {{flag|Argentina}}

| Possessed elongated neural spines on its dorsal vertebrae

| 200px

| 2021

| Bajo de la Carpa Formation (Late Cretaceous, Santonian)

| {{flag|Argentina}}

| May have had a keen sense of hearing due to the shape of its ear{{Cite journal|last1=Gianechini|first1=Federico A.|last2=Méndez|first2= Ariel H.|last3=Filippi|first3=Leonardo S.|last4=Paulina-Carabajal|first4=Ariana|last5=Juárez-Valieri|first5=Rubén D.|last6=Garrido|first6=Alberto C.|title=A New Furileusaurian Abelisaurid from La Invernada (Upper Cretaceous, Santonian, Bajo De La Carpa Formation), Northern Patagonia, Argentina.|journal= Journal of Vertebrate Paleontology|year= 2021|volume=40|issue=6|pages= e1877151|doi= 10.1080/02724634.2020.1877151|doi-access=free}}

|

| 1899

| Cardiel Formation, Metasiete Formation? (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Argentina}}

| Poorly known

|

| 1929

| Allen Formation (Late Cretaceous, Maastrichtian)

| {{flag|Argentina}}

| Potentially synonymous with Neuquensaurus or Saltasaurus

|

| 2017

| Quebrada del Barro Formation (Late Triassic, Norian to Rhaetian)

| {{flag|Argentina}}

| One of the few theropods known from the Rhaetian

| 200px

| 2018

| Candelária Formation (Late Triassic, Norian)

| {{flag|Brazil}}

| One of the oldest sauropodomorphs with an extremely elongated neck

| 200px

| 2007

| Sierra Barrosa Formation (Late Cretaceous, Coniacian)

| {{flag|Argentina}}

| Preserves a series of mineralized plates along the side of the torso

| 200px

| 2019

| Bajo de la Carpa Formation (Late Cretaceous, Santonian)

| {{flag|Argentina}}

| Its holotype was sexually mature but not fully grown

|

| 2022

| Chorrillo Formation (Late Cretaceous, Maastrichtian)

| {{flag|Argentina}}

| The largest, youngest and most completely known megaraptoran

| 200px

| 2008

| Portezuelo Formation (Late Cretaceous, Turonian to Coniacian)

| {{flag|Argentina}}

| Large and robustly built

|

| 2011

| Cañadón Asfalto Formation (Early Jurassic, Toarcian)

| {{flag|Argentina}}

| May have been arboreal due to the structure of its feet, with toes adapted for grasping{{cite journal | last1 = Becerra | first1 = M.C. | last2 = Pol | first2 = D. | last3 = Rauhut | first3 = O.W.M. | last4 = Cerda | first4 = I.A. | title = New heterodontosaurid remains from the Cañadón Asfalto Formation: cursoriality and the functional importance of the pes in small heterodontosaurids | journal = Journal of Paleontology | volume = 90 | issue = 3 | date = 2016 | pages = 555–577 | doi = 10.1017/jpa.2016.24 | bibcode = 2016JPal...90..555B | s2cid = 56436933 | url = https://www.cambridge.org/core/journals/journal-of-paleontology/article/div-classtitlenew-heterodontosaurid-remains-from-the-canadon-asfalto-formation-cursoriality-and-the-functional-importance-of-the-pes-in-small-heterodontosauridsdiv/7E5BA9BACC6FD50F167845272C05391D| hdl = 11336/117485 | hdl-access = free }}

| 200px

| 2006

| Huincul Formation (Late Cretaceous, Cenomanian to Turonian)

| {{flag|Argentina}}

| At least seven specimens of different growth stages are known, possibly suggesting that this taxon lived and/or hunted in packs

| 200px

| 2006

| Adamantina Formation (Late Cretaceous, Maastrichtian)

| {{flag|Brazil}}

| Unusually for a sauropod, it had ridged teeth

| 200px

| 1998

| Portezuelo Formation (Late Cretaceous, Turonian to Coniacian)

| {{flag|Argentina}}

| Possessed a large, strongly curved claw on its first finger

| 200px

| 2003

| Sierra Barrosa Formation (Late Cretaceous, Coniacian)

| {{flag|Argentina}}

| Had spherical osteoderms that were probably located in rows along the flanksGonzález Riga, B.J. (2003). "A new titanosaur (Dinosauria, Sauropoda) from the Upper Cretaceous of Mendoza, Argentina". Amehginiana 40: 155–172.

| 200px

| 2022

| Allen Formation (Late Cretaceous, Maastrichtian)

| {{flag|Argentina}}

| Coexisted with multiple other titanosaurs that may have niche-partitioned{{Cite journal|vauthors=Rolando MA, Garcia Marsà JA, Agnolín FL, Motta MJ, Rodazilla S, Novas FE|date=2022|title=The sauropod record of Salitral Ojo del Agua: An Upper Cretaceous (Allen Formation) fossiliferous locality from northern Patagonia, Argentina|journal=Cretaceous Research|language=en|volume=129|pages=105029|doi=10.1016/j.cretres.2021.105029|bibcode=2022CrRes.12905029R |s2cid=240577726|issn=0195-6671}}

|

| 2022

| Huincul Formation (Late Cretaceous, Cenomanian)

| {{flag|Argentina}}

| Possessed reduced forelimbs convergent with several other groups of theropods

| 200px

| 1893

| Bajo de la Carpa Formation (Late Cretaceous, Santonian)

| {{flag|Argentina}}

| May be a synonym of Neuquensaurus

| 200px

| 2004

| Romualdo Formation (Early Cretaceous, Albian)

| {{flag|Brazil}}

| Its holotype preserves an intestine

| 200px

| 2016

| Sierra Barrosa Formation (Late Cretaceous, Coniacian)

| {{flag|Argentina}}

| Had a brain morphology similar to that of tyrannosaurids but its sensory capabilities were closer to the level of allosauroids{{cite journal| title=The Braincase of the Theropod Dinosaur Murusraptor: Osteology, Neuroanatomy and Comments on the Paleobiological Implications of Certain Endocranial Features| journal=Ameghiniana| volume=54| issue=5| pages=617–640| year=2017| doi=10.5710/AMGH.25.03.2017.3062| last1=Paulina-Carabajal| first1=Ariana| last2=Currie| first2=Philip J.| s2cid=83814434| hdl=11336/184065| hdl-access=free}}

| 200px

| 1979

| Laguna Colorada Formation (Early Jurassic, Sinemurian)

| {{flag|Argentina}}

| Multiple specimens from different growth stages are known. Juveniles may have been quadrupedal and shifted to bipedality as adults{{cite journal |last1=Otero |first1=Alejandro |last2=Cuff |first2=Andrew R. |last3=Allen |first3=Vivian |last4=Sumner-Rooney |first4=Lauren |last5=Pol |first5=Diego |last6=Hutchinson |first6=John R. |title=Ontogenetic changes in the body plan of the sauropodomorph dinosaur Mussaurus patagonicus reveal shifts of locomotor stance during growth |journal=Scientific Reports |publisher=Springer Science and Business Media LLC |volume=9 |issue=1 |date=2019-05-20 |issn=2045-2322 |doi=10.1038/s41598-019-44037-1 |page= 7614|pmid=31110190 |pmc=6527699|bibcode=2019NatSR...9.7614O }}

| 200px

| 2007

| Plottier Formation (Late Cretaceous, Coniacian to Santonian)

| {{flag|Argentina}}

| Relatively gracile for a titanosaur

|

| 2011

| Anacleto Formation (Late Cretaceous, Campanian)

| {{flag|Argentina}}

| Its neural spines are very similar to those of Epachthosaurus

| 200px

| 2005

| Portezuelo Formation (Late Cretaceous, Coniacian)

| {{flag|Argentina}}

| Potentially synonymous with Unenlagia{{cite journal|last1=Hartman|first1=S.|last2=Mortimer|first2=M.|last3=Wahl|first3=W.R.|last4=Lomax|first4=D.R.|last5=Lippincott|first5=J.|last6=Lovelace|first6=D.M.|date=2019|title=A new paravian dinosaur from the Late Jurassic of North America supports a late acquisition of avian flight|journal=PeerJ|volume=7|pages=e7247|doi=10.7717/peerj.7247|pmid=31333906|pmc=6626525 |doi-access=free }}

| 200px

| 1992

| Anacleto Formation (Late Cretaceous, Campanian)

| {{flag|Argentina}}

| One of the smallest known titanosaurs

| 200px

| 2019

| Santa Maria Formation (Late Triassic, Carnian)

| {{flag|Brazil}}

| Originally described as a theropod{{cite journal|last1=Marsola|first1=Júlio C. A.|last2=Bittencourt|first2=Jonathas S.|last3=J. Butler|first3=Richard|last4=Da Rosa|first4=Átila A. S.|last5=Sayão|first5=Juliana M.|last6=Langer|first6=Max C.|year=2019|title=A new dinosaur with theropod affinities from the Late Triassic Santa Maria, South Brazil|url=https://www.researchgate.net/publication/331098176|journal=Journal of Vertebrate Paleontology|volume=38|issue=5|pages=e1531878|doi=10.1080/02724634.2018.1531878|s2cid=91999370}} but has since been reinterpreted as a sauropodomorph{{Cite journal|last1=Pacheco|first1=Cristian|last2=Müller|first2=Rodrigo T.|last3=Langer|first3=Max|last4=Pretto|first4=Flávio A.|last5=Kerber|first5=Leonardo|last6=Dias da Silva|first6=Sérgio|date=2019-11-08|title=Gnathovorax cabreirai : a new early dinosaur and the origin and initial radiation of predatory dinosaurs|journal=PeerJ|language=en|volume=7|pages=e7963|doi=10.7717/peerj.7963|issn=2167-8359|pmc=6844243|pmid=31720108 |doi-access=free }}

| 200px

| 2020

| Allen Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Argentina}}

| Had a uniquely built scapulocoracoid very similar to that of Carnotaurus

| 200px

| 2021

| Bajada Colorada Formation (Early Cretaceous, Berriasian to Valanginian)

| {{flag|Argentina}}

| The oldest known titanosaur

|

| 1980

| Lecho Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Argentina}}

| Originally mistakenly believed to have possessed a dromaeosaurid-like sickle claw

| 200px

| 2007

| Candeleros Formation (Late Cretaceous, Cenomanian)

| {{flag|Argentina}}

| Named from a single, lost vertebra

| 200px

| 1918

| Lago Colhué Huapí Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Argentina}}

| Originally described as a ceratopsian but this identity is today doubted

| 200px

| 2016

| Plottier Formation (Late Cretaceous, Coniacian to Santonian)

| {{flag|Argentina}}

| Unusually for a sauropod, its unguals were truncated

| 200px

| 1998

| Bajo Barreal Formation (Late Cretaceous, Cenomanian to Turonian)

| {{flag|Argentina}}

| Only known from a juvenile skeleton without the skull

| 200px

| 2019

| Chorrillo Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Argentina}}

| Would have niche-partitioned with smaller ornithopods

| 200px

| 2008

| Cerro Fortaleza Formation (Late Cretaceous, Campanian)

| {{flag|Argentina}}

| Had highly specialized dentition similar to that of coelurosaurs

| 200px

| 2020

| Huincul Formation (Late Cretaceous, Cenomanian to Turonian)

| {{flag|Argentina}}

| Shows adaptations for both flight and cursoriality

| 200px

| 2013

| Bajo de la Carpa Formation (Late Cretaceous, Santonian)

| {{flag|Argentina}}

| One of the smallest known aeolosaurins

| 200px

| 2015

| Paja Formation (Early Cretaceous, Barremian)

| {{flag|Colombia}}

| Originally described as a brachiosaurid{{Cite journal|author1=José L. Carballido |author2=Diego Pol |author3=Mary L. Parra Ruge |author4=Santiago Padilla Bernal |author5=María E. Páramo-Fonseca |author6=Fernando Etayo-Serna |year=2015 |title=A new Early Cretaceous brachiosaurid (Dinosauria, Neosauropoda) from northwestern Gondwana (Villa de Leyva, Colombia) |journal=Journal of Vertebrate Paleontology |volume=35 |issue= 5|pages=e980505 |doi=10.1080/02724634.2015.980505 |bibcode=2015JVPal..35E0505C |s2cid=129498917 |url=https://figshare.com/articles/dataset/A_new_Early_Cretaceous_brachiosaurid_Dinosauria_Neosauropoda_from_northwestern_Gondwana_Villa_de_Leiva_Colombia_/1568193 }} although it could also be a somphospondylianPhilip D. Mannion, Ronan Allain & Olivier Moine, 2017, "The earliest known titanosauriform sauropod dinosaur and the evolution of Brachiosauridae", PeerJ 5: e3217

| 200px

| 2011

| Santa Maria Formation (Late Triassic, Carnian)

| {{flag|Brazil}}

| Some features of its jaws are similar to those of theropods

| 200px

| 2011

| Portezuelo Formation (Late Cretaceous, Turonian to Coniacian)

| {{flag|Argentina}}

| Had a troodontid-like metatarsal

| 200px

| 2010

| Allen Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Argentina}}

| Known from a single partial skeleton

|

| 2017

| Cañadón Calcáreo Formation (Late Jurassic, Oxfordian to Tithonian)

| {{flag|Argentina}}

| Inconsistent in phylogenetic placement

|

| 2009

| Ischigualasto Formation (Late Triassic, Carnian)

| {{flag|Argentina}}

| Was omnivorous as indicated by its heterodont dentition

| 200px

| 1996

| Portezuelo Formation (Late Cretaceous, Turonian to Coniacian)

| {{flag|Argentina}}

| Its discovery allowed researchers to connect Alvarezsaurus to parvicursorines{{Cite web|url=https://www.geol.umd.edu/~tholtz/dinoappendix/HoltzappendixWinter2011.pdf|title=Holtz's Genus List|last=Holtz|first=Thomas R.|date=2012}}

| 200px

| 2022

| Allen Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Argentina}}

| Although originally described as a nodosaurid, later analyses recover it as a parankylosaurian{{cite journal|last1=Soto Acuña|first1=Sergio|last2=Vargas|first2=Alexander O.|last3=Kaluza|first3=Jonatan|year=2024|title=A new look at the first dinosaur discovered in Antarctica: reappraisal of Antarctopelta oliveroi (Ankylosauria: Parankylosauria)|journal=Advances in Polar Science|volume=35|issue=1|pages=78–107|doi=10.12429/j.advps.2023.0036}}

| 200px

| 1979

| Cañadón Asfalto Formation (Early Jurassic, Toarcian)

| {{flag|Argentina}}

| Known from remains of adults and juveniles, depicting how various features developed in sauropods as they aged

| 200px

| 2017

| Cerro Barcino Formation (Early Cretaceous, Albian)

| {{flag|Argentina}}

| One of the largest dinosaurs known from reasonably complete remains

| 200px

| 1996

| Allen Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Argentina}}

| May have lived inland unlike other contemporaneous titanosaurs{{cite journal|last1=Salgado|first1=L.|title=Pellegrinisaurus powelli nov. gen. et sp. (Sauropoda, Titanosauridae) from the Upper Cretaceous of Lago Pellegrini, Northwestern Patagonia, Argentina|journal=Ameghiniana|volume=33|issue=4|pages=355–365|date=1996|issn=1851-8044}}

| 200px

| 2022

| La Quinta Formation (Early Jurassic to Middle Jurassic, Toarcian to Aalenian)

| {{flag|Colombia}}

| Only known from a single vertebra

| 200px

| 2011

| Plottier Formation (Late Cretaceous, Coniacian to Santonian)

| {{flag|Argentina}}

| Shares somes features with lognkosaurs, but its membership within this clade cannot be confirmed

| 200px

| 1979

| Cañadón Asfalto Formation (Early Jurassic, Toarcian)

| {{flag|Argentina}}

| One of the few early theropods with a well-preserved braincase

| 200px

| 2019

| Mulichinco Formation (Early Cretaceous, Valanginian)

| {{flag|Argentina}}

| Had elongated spines on its cervical vertebrae, although they were not as tall as those of Amargasaurus and Bajadasaurus{{Cite journal| issn = 1631-0683| volume = 21| issue = 45| pages = 991–1019| last1 = Windholz| first1 = Guillermo J| last2 = Coria| first2 = Rodolfo A.| last3 = Bellardini| first3 = Flavio| last4 = Baiano| first4 = Mattia A.| last5 = Pino| first5 = Diego| last6 = Ortega| first6 = Francisco| last7 = Currie| first7 = Philip J.| title = On a dicraeosaurid specimen from the Mulichinco Formation (Valanginian, Neuquén Basin) of Argentina and phylogenetic relationships of the South American dicraeosaurids (Sauropoda, Diplodocoidea)| journal = Comptes Rendus Palevol| date = 2022-12-21}}

| 200px

| 2008

| Anacleto Formation (Late Cretaceous, Campanian)

| {{flag|Argentina}}

| Known from several bones from different parts of the body, including a braincase

| 200px

| 2017

| Los Colorados Formation (Late Triassic, Norian)

| {{flag|Argentina}}

| Some of this genus' remains were originally associated with those of a pseudosuchian{{cite journal |author=Martín D. Ezcurra |year=2017 |title=A new early coelophysoid neotheropod from the Late Triassic of northwestern Argentina |journal=Ameghiniana |volume=54 |issue=5 |pages=506–538 |url=http://www.ameghiniana.org.ar/index.php/ameghiniana/article/view/3100 |doi=10.5710/AMGH.04.08.2017.3100 |s2cid=135096489 |hdl=11336/56719 |hdl-access=free }}

|

| 2005

| Cerro Fortaleza Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Argentina}}

| Large but only known from very few remains

| 200px

| 2020

| Ciénaga del Río Huaco Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Argentina}}

| Contemporary with Bravasaurus but was most likely distantly related{{Cite journal|author1=E. Martín Hechenleitner |author2=Léa Leuzinger |author3=Agustín G. Martinelli |author4=Sebastián Rocher |author5=Lucas E. Fiorelli |author6=Jeremías R. A. Taborda |author7=Leonardo Salgado |year=2020 |title=Two Late Cretaceous sauropods reveal titanosaurian dispersal across South America |journal=Communications Biology |volume=3 |issue=1 |pages=Article number 622 |doi=10.1038/s42003-020-01338-w |pmid=33110212 |pmc=7591563 }}

|

| 2002

| Cachoeira do Bom Jardim Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Brazil}}

| Potentially the largest known abelisaurid{{cite journal |last1 = Grillo | first1 = O. N. | last2 = Delcourt | first2 = R. |date = 2016 | title = Allometry and body length of abelisauroid theropods: Pycnonemosaurus nevesi is the new king | journal = Cretaceous Research | volume = 69 | pages = 71–89 | doi = 10.1016/j.cretres.2016.09.001}}

| 200px

| 2014

| Lisandro Formation (Late Cretaceous, Turonian)

| {{flag|Argentina}}

| Its humerus has a unique shape

| 200px

| 2001

| Allen Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Argentina}}

| Had proportionally robust legs despite its small size

| 200px

| 1996

| Candeleros Formation (Late Cretaceous, Cenomanian)

| {{flag|Argentina}}

| Very similar to Rebbachisaurus despite being only known from scant remains

| 200px

| 2003

| Bajo de la Carpa Formation (Late Cretaceous, Santonian)

| {{flag|Argentina}}

| Unusually, its caudal vertebrae had a repeating pattern of procoely, amphicoely, opisthocoely and biconvex states

| 200px

| 1969

| Los Colorados Formation (Late Triassic, Norian)

| {{flag|Argentina}}

| Although commonly depicted as quadrupedal, the structure of its shoulder girdle suggests it may have potentially been bipedal

| 200px

| 2000

| Allen Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Argentina}}

| Small for a sauropod yet was very robust

| 200px

| 1980

| Lecho Formation (Late Cretaceous, Maastrichtian)

| {{flag|Argentina}}

| Possessed osteoderms in the form of large round nodules connected by a mass of smaller plates

| 200px

| 2010

| Ischigualasto Formation (Late Triassic, Carnian)

| {{flag|Argentina}}

| Coexisted with Herrerasaurus but most likely represents a separate taxon

| 200px

| 1999

| Romualdo Formation (Early Cretaceous, Aptian to Albian)

| {{flag|Brazil}}

| Preserves soft tissues including the remains of skin, muscle and possibly blood vessels{{Cite journal|last1=Hendrickx|first1=Christophe|last2=Bell|first2=Phil R.|last3=Pittman|first3=Michael|last4=Milner|first4=Andrew R. C.|last5=Cuesta|first5=Elena|last6=O'Connor|first6=Jingmai|last7=Loewen|first7=Mark|last8=Currie|first8=Philip J.|last9=Mateus|first9=Octávio|last10=Kaye|first10=Thomas G.|last11=Delcourt|first11=Rafael|title=Morphology and distribution of scales, dermal ossifications, and other non-feather integumentary structures in non-avialan theropod dinosaurs|url=https://onlinelibrary.wiley.com/doi/abs/10.1111/brv.12829|journal=Biological Reviews|year=2022|volume=97 |issue=3 |pages=960–1004 |language=en|doi=10.1111/brv.12829|pmid=34991180|s2cid=245820672|issn=1469-185X}}Kellner, A. W. A. (1996). Fossilized theropod soft tissue. Nature 379, 32. doi: https://doi.org/10.1038/379032a0

| 200px

| 2016

| Bajo Barreal Formation (Late Cretaceous, Cenomanian to Turonian)

| {{flag|Argentina}}

| Analysis of its inner ear suggests it held its head downwards, possibly indicating a preference for low-growing plants

| 200px

| 1999

| Santa Maria Formation (Late Triassic, Carnian)

| {{flag|Brazil}}

| Known from at least three partial skeletons

| 200px

| 1979

| Lago Colhué Huapí Formation (Late Cretaceous, Maastrichtian)

| {{flag|Argentina}}

| Would have lived in an arid gypsum desert{{cite journal | url=https://www.sbpbrasil.org/assets/uploads/files/rbp19-1/05_Casal%20et%20al_pg53a70_wb.pdf | title=Ordenamiento y caracterización faunística del Cretácico Superior del Grupo Chubut, Cuenca del Golfo San Jorge, Argentina. | journal=Revista Brasileira de Paleontologia | year=2016 | volume=19 | issue=1 | pages=53–70 | doi=10.4072/rbp.2016.1.05| last1=Casal | first1=Gabriel A. | last2=Martínez | first2=Rubén D. | last3=Luna | first3=Marcelo | last4=Ibiricu | first4=Lucio M. }}

| 200px

| 2019

| Lago Colhué Huapí Formation (Late Cretaceous, Campanian)

| {{flag|Argentina}}

| The first non-hadrosaurid ornithopod recovered from central Patagonia

|

| 2024

| Huincul Formation (Late Cretaceous, Cenomanian to Turonian)

| {{flag|Argentina}}

| One of the largest known rebbachisaurids

| 200px

| 2009

| Huincul Formation (Late Cretaceous, Cenomanian to Turonian)

| {{flag|Argentina}}

| Had an unusually short, deep skull

| 200px

| 2020

| Quiricó Formation (Early Cretaceous, Barremian to Aptian)

| {{flag|Brazil}}

| Its holotype was found underneath a sauropod skeleton

| 200px

| 1970

| Santa Maria Formation (Late Triassic, Carnian)

| {{flag|Brazil}}

| May have been a rare component of its environment as only two specimens are known

| 200px

| 2021

| Dorotea Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Chile}}

| Possessed a "macuahuitl" at the end of its tail, made of a connected "frond" of pointed osteoderms

| 200px

| 2014

| La Quinta Formation (Early Jurassic, Hettangian)

| {{flag|Venezuela}}

| Closely related to ceratosaurs and tetanurans{{cite journal |last1=Langer |first1=Max C. |last2=Rincón |first2=Ascanio D. |last3=Ramezani |first3=Jahandar |last4=Solórzano |first4=Andrés |last5=Rauhut |first5=Oliver W.M. |date=8 October 2014 |title=New dinosaur (Theropoda, stem-Averostra) from the earliest Jurassic of the La Quinta formation, Venezuelan Andes |journal=Royal Society Open Science |publisher=Royal Society |doi=10.1098/rsos.140184 |volume=1 |issue=2 |pages=140–184 |pmid=26064540 |pmc=4448901|bibcode=2014RSOS....140184L }}

| 200px

| 2004

| Cerro Fortaleza Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Argentina}}

| May have practiced parental care as an adult and a hatchling have been found together

| 200px

| 2011

| Quiricó Formation (Early Cretaceous, Aptian)

| {{flag|Brazil}}

| One of the few titanosaurs from which a complete skull is known

| 200px

| 2016

| Huincul Formation (Late Cretaceous, Cenomanian)

| {{flag|Argentina}}

| Originally known from a single postorbital. Additional remains were described in 2024{{cite journal|last1=Rolando|first1=Alexis M. Aranciaga|last2=Motta|first2=Matías J.|last3=Agnolín|first3=Federico L.|last4=Tsuihiji|first4=Takanobu|last5=Miner|first5=Santiago|last6=Brissón-Egli|first6=Federico|last7=Novas|first7=Fernando E.|date=9 October 2024|title=A new carcharodontosaurid specimen sheds light on the anatomy of South American giant predatory dinosaurs|journal=The Science of Nature|volume=111|issue=6|page=56|doi=10.1007/s00114-024-01942-4|issn=1432-1904}}

| 200px

| 1999

| Cañadón Calcáreo Formation (Late Jurassic, Oxfordian to Tithonian)

| {{flag|Argentina}}

| Preserves impressions of scaly skin

| 200px

| 2020

| São José do Rio Preto Formation (Late Cretaceous, Santonian)

| {{flag|Brazil}}

| Only known from a single vertebra. The generic name honors the Marvel Comics villain Thanos

| 200px

| 2024

| Açu Formation (Early Cretaceous to Late Cretaceous, Albian to Cenomanian).

| {{flag|Brazil}}

| Named after a Mesopotamian goddess

| 200px

| 2024

| Marfim Formation (Early Cretaceous, Valanginian to Hauterivian).

| {{flag|Brazil}}

| The first unambiguous ornithischian genus described from Brazil{{cite journal |last1=Bandeira |first1=Kamila L. N. |last2=Navarro |first2=Bruno A. |last3=Pêgas |first3=Rodrigo V. |last4=Brilhante |first4=Natan S. |last5=Brum |first5=Arthur S. |last6=de Souza |first6=Lucy G. |last7=de Silva |first7=Rafael C. |last8=Gallo |first8=Valéria |year=2024 |title=A reassessment of the historical fossil findings from Bahia State (Northeast Brazil) reveals a diversified dinosaur fauna in the Lower Cretaceous of South America |journal=Historical Biology |pages=1–42 |doi=10.1080/08912963.2024.2318406 |doi-access=free}}

| 200px

| 2024

| La Colonia Formation (Late Cretaceous, Maastrichtian)

| {{flag|Argentina}}

| The morphology of its astragalus is intermediate between members of the Colossosauria and Saltasauroidea{{cite journal|last1=Pérez-Moreno|first1=A.|last2=Salgado|first2=L.|last3=Carballido|first3=J.L.|last4=Otero|first4=A.|last5=Pol|first5=D.|year=2024|title=A new titanosaur from the La Colonia Formation (Campanian-Maastrichtian), Chubut Province, Argentina|journal=Historical Biology: An International Journal of Paleobiology|pages=1–20|doi=10.1080/08912963.2024.2332997}}

| 200px

| 2020

| Huincul Formation (Late Cretaceous, Cenomanian to Turonian)

| {{flag|Argentina}}

| Exhibits a conflicting blend of characteristics from basal and derived abelisauroids

|

| 2018

| Bajo de la Carpa Formation (Late Cretaceous, Santonian)

| {{flag|Argentina}}

| One of the youngest known megaraptorans{{cite journal|last1=Porfiri|first1=Juan D|last2=Juárez Valieri|first2=Rubén D|last3=Santos|first3=Domenica D.D|last4=Lamanna|first4=Matthew C|year=2018|title=A new megaraptoran theropod dinosaur from the Upper Cretaceous Bajo de la Carpa Formation of northwestern Patagonia|url=https://www.researchgate.net/publication/323878344|journal=Cretaceous Research|volume=89|pages=302–319|doi=10.1016/j.cretres.2018.03.014|bibcode=2018CrRes..89..302P |s2cid=134117648}}

| 200px

| 2011

| Bajo de la Carpa Formation (Late Cretaceous, Santonian)

| {{flag|Argentina}}

| Retained basal features in its caudal vertebrae despite its late age

|

| 2005

| Serra da Galga Formation (Late Cretaceous, Maastrichtian)

| {{flag|Brazil}}

| Potentially synonymous with Baurutitan

| 200px

| 2017

| Rio Piranhas Formation (Early Cretaceous, Berriasian to Valanginian)

| {{flag|Brazil}}

| Originally described as a titanosaur{{cite journal | last1 = Carvalho | first1 = I.S. | last2 = Salgado | first2 = L. | last3 = Lindoso | first3 = R.M. | last4 = de Araújo-Júnior | first4 = H.I. | last5 = Costa Nogueir | first5 = F.C. | last6 = Soares | first6 = J.A. | title = A new basal titanosaur (Dinosauria, Sauropoda) from the Lower Cretaceous of Brazil | journal = Journal of South American Earth Sciences | volume = 75 | pages = 74–84 | date = 2017 | doi = 10.1016/j.jsames.2017.01.010 | bibcode = 2017JSAES..75...74C | hdl = 11336/77769 | url = https://www.igeo.ufrj.br/ismar/3/3_59.pdf}} but similarities have been noted with basal somphospondylians{{cite journal | first1 = S.F. | last1 = Poropat | first2 = J.P. | last2 = Nair | first3 = C.E. | last3 = Syme | first4 = P.D. | last4 = Mannion | first5 = P. | last5 = Upchurch | first6 = S.A. | last6 = Hocknull | first7 = A.G. | last7 = Cook | first8 = T.R. | last8 = Tischler | first9 = T. | last9 = Holland | date = 2017 | title = Reappraisal of Austrosaurus mckillopi Longman, 1933 from the Allaru Mudstone of Queensland, Australia's first named Cretaceous sauropod dinosaur | journal=Alcheringa | volume = 41 | issue = 4 | pages = 543–580 | doi = 10.1080/03115518.2017.1334826| bibcode = 2017Alch...41..543P | url = http://discovery.ucl.ac.uk/1559539/1/Reappraisal%20of%20Austrosaurus%20mckillopi%20Longman_Poropat.pdf | hdl = 10044/1/48659 | s2cid = 134237391 | hdl-access = free }}

|

| 2005

| Cerro Barcino Formation (Early Cretaceous, Aptian)

| {{flag|Argentina}}

| Unlike other carcharodontosaurids, its sacral and caudal vertebrae were not pneumatic

| 200px

| 2008

| Serra da Galga Formation (Late Cretaceous, Maastrichtian)

| {{flag|Brazil}}

| Several individuals are known, some of which are very large

| 200px

| 2024

| Guichón Formation (Late Cretaceous, Cenomanian to Santonian)

| {{flag|Uruguay}}

| Known from at least two fragmentary specimens

| 200px

| 2004

| Caturrita Formation (Late Triassic, Carnian to Norian)

| {{flag|Brazil}}

| Described as the first plateosaurid-grade sauropodomorph from Brazil

| 200px

| 1997

| Portezuelo Formation (Late Cretaceous, Coniacian)

| {{flag|Argentina}}

| Could potentially be adapted for flapping due to the structure of its shoulder girdle{{cite journal|last1=Gianechini|first1=F. A.|last2=Apesteguía|first2=S.|title=Unenlagiinae revisited: Dromaeosaurid theropods from South America|doi=10.1590/S0001-37652011000100009|pmid=21437380|journal=Anais da Academia Brasileira de Ciências|volume=83|issue=1|pages=163–95|year=2011|url=https://www.researchgate.net/publication/50851715|doi-access=free|hdl=11336/191999|hdl-access=free}}

| 200px

| 1979

| Los Blanquitos Formation (Late Cretaceous, Maastrichtian)

| {{flag|Argentina}}

| Has been suggested to be a dromaeosauridR.D. Martínez and F.E. Novas, 2006, "Aniksosaurus darwini gen. et sp. nov., a new coelurosaurian theropod from the early Late Cretaceous of central Patagonia, Argentina", Revista del Museo Argentino de Ciencias Naturales, nuevo serie 8(2): 243-259 or a carcharodontosaurid{{cite journal |last1=Matthew |first1=Carrano |title=The phylogeny of Tetanurae (Dinosauria: Theropoda) |journal=Journal of Systematic Palaeontology |year=2012 |volume=10 |issue=2 |pages=211–300 |doi=10.1080/14772019.2011.630927 |bibcode=2012JSPal..10..211C |s2cid=85354215 |url=https://www.researchgate.net/publication/230808558}}

|

| 1991

| Bajo de la Carpa Formation (Late Cretaceous, Santonian)

| {{flag|Argentina}}

| Unusually, its third metatarsal is the thickest, which may be an adaptation to running

| 200px

| 2019

| Rio Paraná Formation (Early Cretaceous to Late Cretaceous, Aptian to Campanian)

| {{flag|Brazil}}

| Possessed raised claws on its second and fourth toes, making it functionally monodactyl, a possible adaptation to its desert habitat

| 200px

| 2016

| Bajo de la Carpa Formation (Late Cretaceous, Santonian)

| {{flag|Argentina}}

| May have relied on quick movements of its head and gaze stabilization when hunting

| 200px

| 1979

| Cañadón Asfalto Formation (Early Jurassic, Toarcian)

| {{flag|Argentina}}

| Coexisted with at least four other eusauropods

|

| 2010

| Allen Formation (Late Cretaceous, Campanian to Maastrichtian)

| {{flag|Argentina}}

| As originally described, it represented a chimera of two different taxa, one of which was later named Bonapartesaurus{{cite journal|last1=Cruzado-Caballero|first1=P.|last2=Powell|first2=J. E.|title=Bonapartesaurus rionegrensis, a new hadrosaurine dinosaur from South America: implications for phylogenetic and biogeographic relations with North America|journal=Journal of Vertebrate Paleontology|volume=37|issue=2 |year=2017|pages=1–16|doi=10.1080/02724634.2017.1289381|bibcode=2017JVPal..37E9381C |s2cid=90963879|hdl=11336/57944|url=http://rid.unrn.edu.ar/handle/20.500.12049/5513 |hdl-access=free}}

| 200px

| 1986

| Bajo Barreal Formation (Late Cretaceous, Cenomanian to Turonian)

| {{flag|Argentina}}

| Had an unusually-shaped astragalus and calcaneum

| 200px

| 2019

| Río Playas Formation (Late Cretaceous, Maastrichtian)

| {{flag|Ecuador}}

| The northernmost saltasaurine known to date

| 200px

| 2021

| Serra da Galga Formation (Late Cretaceous, Maastrichtian)

| {{flag|Brazil}}

| May have been a piscivore due to the shape of its teethBrum, Arthur Souza, Pêgas, Rodrigo Vargas, Bandeira, Kamila Luisa Nogueira, Souza, Lucy Gomes de, Campos, Diogenes de Almeida, & Kellner, Alexander Wilhelm Armin. (2021). A new Unenlagiinae (Theropoda: Dromaeosauridae) from the Late Cretaceous of Brazil. https://doi.org/10.1002/spp2.1375

| 200px

| 2006

| La Amarga Formation (Early Cretaceous, Hauterivian to Aptian)

| {{flag|Argentina}}

| Known from an incomplete skeleton, including several caudal vertebrae

| 200px

| 2003

| Los Colorados Formation (Late Triassic, Norian)

| {{flag|Argentina}}

| Although commonly depicted with head crests, they may in fact be misplaced lacrimal bonesEzcurra, M.D. & Novas, F.E. 2005. Phylogenetic relationships of the Triassic theropod Zupaysaurus rougieri from NW Argentina. Presented in August 2005 during the [http://acd.ufrj.br/mndgp/2clpv/en/index.html II Latin American Congress of Vertebrate Paleontology] {{webarchive |url=https://web.archive.org/web/20060504212911/http://acd.ufrj.br/mndgp/2clpv/en/index.html |date=May 4, 2006 }} in Rio de Janeiro, Brazil. This analysis will be published in peer-reviewed print form later in 2006. A summary of the talk can be seen [http://dml.cmnh.org/2005Aug/msg00175.html here].

| 200px