Wikipedia
List of South American dinosaurs
This is a list of dinosaurs whose remains have been recovered from South America.
Criteria for inclusion Edit
- The genus must appear on the List of dinosaur genera.
- At least one named species of the creature must have been found in South America.
- This list is a complement to Category:Mesozoic dinosaurs of South America.
List of South American dinosaurs Edit
Valid genera Edit
Name | Year | Formation | Location | Notes | Images |
---|---|---|---|---|---|
Abelisaurus | 1985 | Allen Formation?/Anacleto Formation? (Late Cretaceous, Campanian) | Argentina | Only known from a single partial skull | |
Achillesaurus | 2007 | Bajo de la Carpa Formation (Late Cretaceous, Santonian) | Argentina | Potentially a junior synonym of Alvarezsaurus[1] | |
Adamantisaurus | 2006 | Adamantina Formation (Late Cretaceous, Turonian to Maastrichtian) | Brazil | Derived for a titanosaur as indicated by the ball-and-socket articulations of its caudal vertebrae | |
Adeopapposaurus | 2009 | Cañón del Colorado Formation (Early Jurassic, Hettangian to Pliensbachian) | Argentina | May have had a keratinous beak based on the shape of its jaw bones | |
Aeolosaurus | 1987 | Allen Formation?, Angostura Colorada Formation, Lago Colhué Huapí Formation, Los Alamitos Formation? (Late Cretaceous, Campanian to Maastrichtian) | Argentina Brazil? | Known from the remains of several individuals | |
Aerosteon | 2009 | Anacleto Formation?/Plottier Formation? (Late Cretaceous, Coniacian to Campanian) | Argentina) | Its bones were extensively pneumatized, suggesting an air sac system like those of modern birds | |
Agustinia | 1999 | Lohan Cura Formation (Early Cretaceous, Aptian to Albian) | Argentina | Originally described as possessing long, vaguely-stegosaur like spikes, although these turned out to be fragments of ribs and other bones[2] | |
Alnashetri | 2012 | Candeleros Formation (Late Cretaceous, Cenomanian) | Argentina | The oldest alvarezsauroid known from South America | |
Alvarezsaurus | 1991 | Bajo de la Carpa Formation (Late Cretaceous, Santonian) | Argentina | One of the largest known alvarezsaurids | |
Amargasaurus | 1991 | La Amarga Formation (Early Cretaceous, Barremian to Aptian) | Argentina | Possessed two parallel rows of backward-pointing spines on its neck that may have been covered by keratin sheaths[3] or a skin sail[4] | |
Amargatitanis | 2007 | La Amarga Formation (Early Cretaceous, Barremian to Aptian) | Argentina | Originally described as a titanosaur[5] although it has since been reinterpreted as a dicraeosaurid[6] | |
Amazonsaurus | 2003 | Itapecuru Formation (Early Cretaceous, Aptian to Albian) | Brazil | Had tall neural spines on its caudal vertebrae | |
Amygdalodon | 1947 | Cerro Carnerero Formation (Early Jurassic, Toarcian) | Argentina | Its teeth were shaped like almonds | |
Anabisetia | 2002 | Lisandro Formation (Late Cretaceous, Cenomanian to Turonian) | Argentina | Four specimens are known but the skull remains incompletely known | |
Andesaurus | 1991 | Candeleros Formation (Late Cretaceous, Cenomanian) | Argentina | Several osteological features indicate a basal position within the Titanosauria | |
Aniksosaurus | 2006 | Bajo Barreal Formation (Late Cretaceous, Cenomanian to Turonian) | Argentina | Bone bed remains suggest a gregarious lifestyle[7] | |
Antarctosaurus | 1929 | Anacleto Formation, Plottier Formation? (Late Cretaceous, Coniacian to Campanian) | Argentina Brazil? | Multiple specimens have been assigned to this genus, including some from outside South America, but most may not represent the same taxon | |
Aoniraptor | 2016 | Huincul Formation (Late Cretaceous, Cenomanian to Turonian) | Argentina | Either a valid megaraptoran or a synonym of Gualicho[8] | |
Arackar | 2021 | Hornitos Formation (Late Cretaceous, Campanian to Maastrichtian) | Chile | The most complete sauropod known from Chile | |
Aratasaurus | 2020 | Romualdo Formation (Early Cretaceous, Albian) | Brazil | All three of its toes were symmetric | |
Argentinosaurus | 1993 | Huincul Formation (Late Cretaceous, Cenomanian to Turonian) | Argentina | May be the largest known dinosaur | |
Argyrosaurus | 1893 | Lago Colhué Huapí Formation (Late Cretaceous, Campanian to Maastrichtian) | Argentina | Several remains were historically assigned to this genus, but only the holotype can be confidently assigned to it[9] | |
Arrudatitan | 2021 | Adamantina Formation (Late Cretaceous, Campanian to Maastrichtian) | Brazil | Its tail probably curved strongly downward, with the tip held very low to the ground[10] | |
Asfaltovenator | 2019 | Cañadón Asfalto Formation (Early Jurassic, Toarcian) | Argentina | Combines traits of both megalosauroids and allosauroids. Its describers suggest paraphyly of the former group[11] | |
Atacamatitan | 2011 | Tolar Formation (Late Cretaceous) | Chile | Only known from a single, fragmentary skeleton | |
Aucasaurus | 2002 | Anacleto Formation (Late Cretaceous, Santonian to Campanian) | Argentina | Known from almost the entire skeleton, including most of the skull | |
Austrocheirus | 2010 | Cerro Fortaleza Formation (Late Cretaceous, Campanian) | Argentina | Unusually for an abelisauroid, its arms were relatively long | |
Austroposeidon | 2016 | Presidente Prudente Formation (Late Cretaceous, Campanian to Maastrichtian) | Brazil | The largest dinosaur known from Brazil | |
Austroraptor | 2008 | Allen Formation (Late Cretaceous, Campanian to Maastrichtian) | Argentina | Possessed an elongated snout paralleling that of spinosaurids | |
Baalsaurus | 2018 | Portezuelo Formation (Late Cretaceous, Turonian to Coniacian) | Argentina | Had a squared-off dentary with its teeth crowded to the front | |
Bagualia | 2020 | Cañadón Asfalto Formation (Early Jurassic, Toarcian) | Argentina | Represents an early radiation of eusauropods that displaced earlier basal sauropodomorphs after a global warming event[12] | |
Bagualosaurus | 2018 | Santa Maria Formation (Late Triassic, Carnian) | Brazil | Its hindlimbs were very robust | |
Bajadasaurus | 2019 | Bajada Colorada Formation (Early Cretaceous, Berriasian to Valanginian) | Argentina | Possessed elongated, forward-pointing spines erupting in pairs from the neck | |
Barrosasaurus | 2009 | Anacleto Formation (Late Cretaceous, Campanian) | Argentina | Only known from three vertebrae but are well-preserved enough to warrant recognition as a distinct genus | |
Baurutitan | 2005 | Serra da Galga Formation (Late Cretaceous, Campanian) | Brazil | Originally described from an associated series of nineteen vertebrae; new remains were discovered later[13] | |
Berthasaura | 2021 | Goio-Erê Formation (Early Cretaceous, Aptian to Albian) | Brazil | Possessed a short, toothless beak, indicating a herbivorous or omnivorous diet | |
Bicentenaria | 2012 | Candeleros Formation (Late Cretaceous, Cenomanian) | Argentina | Several individuals were preserved together, suggesting a gregarious lifestyle[14] | |
Bonapartenykus | 2012 | Allen Formation (Late Cretaceous, Campanian to Maastrichtian) | Argentina | Its holotype was preserved with two eggs that may have been within its oviducts when it died[15] | |
Bonapartesaurus | 2017 | Allen Formation (Late Cretaceous, Campanian to Maastrichtian) | Argentina | Represents an endemic South American clade of hadrosaurids[16] | |
Bonatitan | 2004 | Allen Formation (Late Cretaceous, Campanian to Maastrichtian) | Argentina | Analysis of its inner ear suggests a decreased range of head movements compared to other sauropods[17] | |
Bonitasaura | 2004 | Bajo de la Carpa Formation (Late Cretaceous, Santonian) | Argentina | The proportions of its body were somewhat similar to those of diplodocoids, likely through convergent evolution | |
Brachytrachelopan | 2005 | Cañadón Calcáreo Formation (Late Jurassic, Oxfordian to Tithonian) | Argentina | Possessed the shortest neck of any known sauropod | |
Brasilotitan | 2013 | Adamantina Formation (Late Cretaceous, Maastrichtian) | Brazil | Had an L-shaped dentary similar to that of Antarctosaurus and Bonitasaura | |
Bravasaurus | 2020 | Ciénaga del Río Huaco Formation (Late Cretaceous, Campanian to Maastrichtian) | Argentina | Discovered close to a large concentration of titanosaur eggs | |
Buitreraptor | 2005 | Candeleros Formation (Late Cretaceous, Cenomanian to Turonian) | Argentina | May have been a pursuit predator due to its long legs[18] | |
Buriolestes | 2016 | Santa Maria Formation (Late Triassic, Carnian) | Brazil | Unlike all other sauropodomorphs, it was completely carnivorous, with serrated teeth to match | |
Caieiria | 2022 | Serra da Galga Formation (Late Cretaceous, Maastrichtian) | Brazil | Its caudal vertebrae had an unusual anatomy | |
Campylodoniscus | 1961 | Bajo Barreal Formation? (Late Cretaceous, Cenomanian) | Argentina | Only known from a single maxilla with seven teeth | |
Carnotaurus | 1985 | La Colonia Formation (Late Cretaceous, Maastrichtian) | Argentina | Possessed a pair of short horns on the top of its skull | |
Cathartesaura | 2005 | Huincul Formation (Late Cretaceous, Cenomanian) | Argentina | Had a well-muscled neck although it could not move strongly up or down | |
Chilesaurus | 2015 | Toqui Formation (Late Jurassic, Tithonian) | Chile | Combines traits of theropods, sauropodomorphs, and ornithischians, with far-reaching implications for the evolution of the Dinosauria | |
Choconsaurus | 2017 | Huincul Formation (Late Cretaceous, Cenomanian) | Argentina | One of the more completely known basal titanosaurs | |
Chromogisaurus | 2010 | Ischigualasto Formation (Late Triassic, Carnian) | Argentina | Its discovery suggests that early dinosaurs were more diverse than previously thought | |
Chubutisaurus | 1975 | Cerro Barcino Formation (Early Cretaceous, Albian) | Argentina | Unusually, its forelimbs were shorter than its hindlimbs[19] | |
Chucarosaurus | 2023 | Huincul Formation (Late Cretaceous, Cenomanian to Turonian | Argentina | A large colossosaurian titanosaur[20] | |
Clasmodosaurus | 1898 | Bajo Barreal Formation (Late Cretaceous, Cenomanian to Turonian) | Argentina | Similarly to Bonitasaura, its teeth were polygonal in cross-section | |
Coloradisaurus | 1990 | Los Colorados Formation (Late Triassic, Norian) | Argentina | Originally called Coloradia, although that genus name is occupied by a moth | |
Comahuesaurus | 2012 | Lohan Cura Formation (Early Cretaceous, Aptian to Albian) | Argentina | Its holotype was originally assigned to Limaysaurus, but it was named as a separate genus due to several morphological differences | |
Condorraptor | 2005 | Cañadón Asfalto Formation (Early Jurassic, Toarcian) | Argentina | Closely related to the coeval Piatnitzkysaurus but could be distinguished by several osteological features | |
Dreadnoughtus | 2014 | Cerro Fortaleza Formation (Late Cretaceous, Campanian to Maastrichtian) | Argentina | The heaviest land animal whose mass can be calculated with reasonable certainty | |
Drusilasaura | 2011 | Bajo Barreal Formation (Late Cretaceous, Cenomanian to Turonian) | Argentina | Potentially the oldest known member of the lognkosaurian lineage[21] | |
Ekrixinatosaurus | 2004 | Candeleros Formation (Late Cretaceous, Cenomanian) | Argentina | Had robust bones, indicating a massive build and a greater resistance to injuries[22] | |
Elaltitan | 2012 | Bajo Barreal Formation (Late Cretaceous, Cenomanian to Turonian) | Argentina | Extremely large as indicated by its long femur | |
Elemgasem | 2022 | Portezuelo Formation (Late Cretaceous, Turonian to Coniacian) | Argentina | The first abelisaurid known from the Turonian-Coniacian interval | |
Eoabelisaurus | 2012 | Cañadón Asfalto Formation (Early Jurassic, Toarcian) | Argentina | Shows a transitional arm morphology for an abelisauroid, with a shortened lower arm and hand, but an unreduced humerus | |
Eodromaeus | 2011 | Ischigualasto Formation (Late Triassic, Carnian | Argentina | Well-adapted for cursoriality despite its early age[23] | |
Eoraptor | 1993 | Ischigualasto Formation (Late Triassic, Carnian) | Argentina | Possessed different types of teeth, suggesting it was omnivorous | |
Epachthosaurus | 1990 | Bajo Barreal Formation (Late Cretaceous, Cenomanian to Turonian) | Argentina | Its caudal vertebrae were procoelous; i.e. concave at the front and convex at the back | |
Erythrovenator | 2021 | Candelária Formation (Late Triassic, Carnian to Norian) | Brazil | Known from the Riograndia Assemblage Zone, an area which is unusually dominated by cynodonts | |
Futalognkosaurus | 2007 | Portezuelo Formation (Late Cretaceous, Coniacian) | Argentina | Possessed meter-deep cervical vertebrae with distinctive shark fin-shaped neural spines | |
Gasparinisaura | 1996 | Anacleto Formation (Late Cretaceous, Campanian) | Argentina | Known from specimens of both adults and juveniles | |
Genyodectes | 1901 | Cerro Barcino Formation (Early Cretaceous, Aptian to Albian) | Argentina | Had extremely large and protruding teeth | |
Giganotosaurus | 1995 | Candeleros Formation (Late Cretaceous, Cenomanian) | Argentina | One of the largest known terrestrial carnivorous dinosaurs | |
Gnathovorax | 2019 | Santa Maria Formation (Late Triassic, Carnian) | Brazil | Known from a well-preserved, almost complete skeleton | |
Gondwanatitan | 1999 | Adamantina Formation (Late Cretaceous, Maastrichtian) | Brazil | For a titanosaur, it had relatively gracile limb bones | |
Gonkoken | 2023 | Dorotea Formation (Late Cretaceous, Campanian to Maastrichtian) | Chile | It exhibits a blend of derived hadrosaurid traits and ancestral hadrosauroid traits | |
Guaibasaurus | 1999 | Caturrita Formation (Late Triassic, Norian) | Brazil | Combines features of both early theropods and sauropodomorphs | |
Gualicho | 2016 | Huincul Formation (Late Cretaceous, Cenomanian to Turonian) | Argentina | Originally described as having highly reduced arms with only two fingers, convergent with tyrannosaurids, although one study suggests a third finger was present[24] | |
Guemesia | 2022 | Los Blanquitos Formation (Late Cretaceous, Campanian) | Argentina | Unlike other abelisaurids, it lacked ornamentation on its skull[25] | |
Herrerasaurus | 1963 | Ischigualasto Formation (Late Triassic, Carnian) | Argentina | One of the largest early carnivorous dinosaurs. Usually considered a basal saurischian but may be just outside Dinosauria[26] | |
Huallasaurus | 2022 | Los Alamitos Formation (Late Cretaceous, Santonian to Maastrichtian) | Argentina | Remains originally misidentified as belonging to a southern species of Kritosaurus | |
Huinculsaurus | 2020 | Huincul Formation (Late Cretaceous, Cenomanian to Turonian) | Argentina | The youngest known elaphrosaurine | |
Ibirania | 2022 | São José do Rio Preto Formation (Late Cretaceous, Santonian to Campanian) | Brazil | May have attained its small size due to its arid inland habitat, unlike other titanosaurs which were affected by insular dwarfism[27] | |
Ilokelesia | 1998 | Huincul Formation (Late Cretaceous, Cenomanian) | Argentina | Its skull retains some basal abelisauroid traits | |
Ingentia | 2018 | Quebrada del Barro Formation (Late Triassic, Norian to Rhaetian) | Argentina | The earliest known very large sauropodomorph[28] | |
Irritator | 1996 | Romualdo Formation (Early Cretaceous, Albian) | Brazil | May have been the apex predator of its habitat, hunting both aquatic and terrestrial prey[29] | |
Isaberrysaura | 2017 | Los Molles Formation (Middle Jurassic, Bajocian) | Argentina | Preserves gut contents including whole seeds | |
Isasicursor | 2019 | Chorrillo Formation (Late Cretaceous, Campanian to Maastrichtian) | Argentina | Four individuals of different ages were found together, suggesting it lived in herds[30] | |
Itapeuasaurus | 2019 | Alcântara Formation (Late Cretaceous, Cenomanian) | Brazil | Only known from six vertebrae | |
Jakapil | 2022 | Candeleros Formation (Late Cretaceous, Cenomanian) | Argentina | Represents a novel lineage of basal thyreophorans, characterized by small size, deep jaws, and a bipedal stance | |
Kaijutitan | 2019 | Sierra Barrosa Formation (Late Cretaceous, Coniacian) | Argentina | One of the latest-surviving basal titanosaurs | |
Katepensaurus | 2013 | Bajo Barreal Formation (Late Cretaceous, Cenomanian to Turonian) | Argentina | Distinguished by a certain opening in its dorsal vertebrae | |
Kelumapusaura | 2022 | Allen Formation (Late Cretaceous, Campanian to Maastrichtian) | Argentina | Known from the remains of various individuals | |
Kurupi | 2021 | Marília Formation (Late Cretaceous, Maastrichtian) | Brazil | Would have had a stiff tail as indicated by the anatomy of its caudal vertebrae | |
Lajasvenator | 2020 | Mulichinco Formation (Early Cretaceous, Valanginian) | Argentina | One of the smallest known allosauroids | |
Lapampasaurus | 2012 | Allen Formation (Late Cretaceous, Campanian to Maastrichtian) | Argentina | Known from a partial skeleton lacking the skull | |
Laplatasaurus | 1929 | Anacleto Formation (Late Cretaceous, Campanian) | Argentina | Osteoderms have been assigned to this taxon although this referral is uncertain | |
Laquintasaura | 2014 | La Quinta Formation (Early Jurassic, Hettangian) | Venezuela | One study recovered it as a basal thyreophoran[31] despite the fact no osteoderms have been found | |
Lavocatisaurus | 2018 | Rayoso Formation (Early Cretaceous, Aptian to Albian) | Argentina | May have possessed a keratinous beak[32] | |
Leinkupal | 2014 | Bajada Colorada Formation (Early Cretaceous, Berriasian to Valanginian) | Argentina | The youngest known diplodocid | |
Leonerasaurus | 2011 | Las Leoneras Formation (Early Jurassic) | Argentina | Has an unusual combination of basal and derived traits | |
Lessemsaurus | 1999 | Los Colorados Formation (Late Triassic, Norian) | Argentina | Grew very large despite lacking the anatomical traits usually seen as supporting gigantism[28] | |
Leyesaurus | 2011 | Quebrada del Barro Formation (Early Jurassic, Hettangian to Toarcian) | Argentina | Had an unusually small skull | |
Ligabueino | 1996 | La Amarga Formation (Early Cretaceous, Barremian to Aptian) | Argentina | Known from a single, very small, juvenile skeleton | |
Ligabuesaurus | 2006 | Lohan Cura Formation (Early Cretaceous, Aptian to Albian) | Argentina | Its forelimbs were extremely long, with similar proportions to those of brachiosaurids[33] | |
Limaysaurus | 2004 | Candeleros Formation, Huincul Formation (Late Cretaceous, Cenomanian) | Argentina | Possessed elongated neural spines on its dorsal vertebrae | |
Llukalkan | 2021 | Bajo de la Carpa Formation (Late Cretaceous, Santonian) | Argentina | May have had a keen sense of hearing due to the shape of its ear[34] | |
Loncosaurus | 1899 | Cardiel Formation?/Metasiete Formation? (Late Cretaceous, Campanian to Maastrichtian) | Argentina | Poorly known | |
Loricosaurus | 1929 | Allen Formation (Late Cretaceous, Maastrichtian) | Argentina | Potentially synonymous with Neuquensaurus or Saltasaurus | |
Lucianovenator | 2017 | Quebrada del Barro Formation (Late Triassic, Norian to Rhaetian) | Argentina | One of the few theropods known from the Rhaetian | |
Macrocollum | 2018 | Candelária Formation (Late Triassic, Norian) | Brazil | One of the oldest sauropodomorphs with an extremely elongated neck | |
Macrogryphosaurus | 2007 | Sierra Barrosa Formation (Late Cretaceous, Coniacian) | Argentina | Preserves a series of mineralized plates along the side of the torso | |
Mahuidacursor | 2019 | Bajo de la Carpa Formation (Late Cretaceous, Santonian) | Argentina | Its holotype was sexually mature but not fully grown | |
Maip | 2022 | Chorrillo Formation (Late Cretaceous, Maastrichtian) | Argentina | The largest, youngest, and most completely known megaraptoran | |
Malarguesaurus | 2008 | Portezuelo Formation (Late Cretaceous, Turonian to Coniacian) | Argentina | Large and robustly built | |
Manidens | 2011 | Cañadón Asfalto Formation (Early Jurassic, Toarcian) | Argentina | May have been arboreal due to the structure of its feet, with toes adapted for grasping[35] | |
Mapusaurus | 2006 | Huincul Formation (Late Cretaceous, Cenomanian to Turonian) | Argentina | At least seven specimens of different growth stages are known, possibly suggesting that lived and/or hunted in packs | |
Maxakalisaurus | 2006 | Adamantina Formation (Late Cretaceous, Maastrichtian) | Brazil | Unusually for a sauropod, it had ridged teeth | |
Megaraptor | 1998 | Portezuelo Formation (Late Cretaceous, Turonian to Coniacian) | Argentina | Possessed a large, strongly curved claw on its first finger | |
Mendozasaurus | 2003 | Sierra Barrosa Formation (Late Cretaceous, Coniacian) | Argentina | Had spherical osteoderms that were probably located in rows along the flanks[36] | |
Menucocelsior | 2022 | Allen Formation (Late Cretaceous, Maastrichtian) | Argentina | Coexisted with multiple other titanosaurs that may have niche-partitioned[37] | |
Meraxes | 2022 | Huincul Formation (Late Cretaceous, Cenomanian) | Argentina | Possessed reduced forelimbs convergent with several other groups of theropods | |
Microcoelus | 1893 | Bajo de la Carpa Formation (Late Cretaceous, Santonian to Campanian) | Argentina | May be a synonym of Neuquensaurus | |
Mirischia | 2004 | Romualdo Formation (Early Cretaceous, Albian) | Brazil | Its holotype preserves an intestine | |
Murusraptor | 2016 | Sierra Barrosa Formation (Late Cretaceous, Coniacian) | Argentina | Had a brain morphology similar to that of tyrannosaurids but its sensory capabilities were closer to the level of allosauroids[38] | |
Mussaurus | 1979 | Laguna Colorada Formation (Early Jurassic, Pliensbachian) | Argentina | Multiple specimens from different growth stages are known. Juveniles may have been quadrupedal and shifted to bipedality as adults[39] | |
Muyelensaurus | 2007 | Plottier Formation (Late Cretaceous, Coniacian to Santonian) | Argentina | Relatively gracile for a titanosaur | |
Narambuenatitan | 2011 | Anacleto Formation (Late Cretaceous, Campanian) | Argentina | Its neural spines are very similar to those of Epachthosaurus | |
Neuquenraptor | 2005 | Portezuelo Formation (Late Cretaceous, Coniacian) | Argentina | Potentially synonymous with Unenlagia[40] | |
Neuquensaurus | 1992 | Anacleto Formation (Late Cretaceous, Campanian) | Argentina Uruguay? | One of the smallest known titanosaurs | |
Nhandumirim | 2019 | Santa Maria Formation (Late Triassic, Carnian) | Brazil | Originally described as a theropod[41] but has since been reinterpreted as a sauropodomorph[42] | |
Niebla | 2020 | Allen Formation (Late Cretaceous, Campanian to Maastrichtian) | Argentina | Had a uniquely-built scapulocoracoid very similar to that of Carnotaurus | |
Ninjatitan | 2021 | Bajada Colorada Formation (Early Cretaceous, Berriasian to Valanginian) | Argentina | The oldest known titanosaur | |
Noasaurus | 1980 | Lecho Formation (Late Cretaceous, Campanian to Maastrichtian) | Argentina | Originally mistakenly believed to have possessed a dromaeosaurid-like sickle claw | |
Nopcsaspondylus | 2007 | Candeleros Formation (Late Cretaceous, Cenomanian) | Argentina | Named from a single, lost vertebra | |
Notoceratops | 1918 | Lago Colhué Huapí Formation (Late Cretaceous, Campanian to Maastrichtian) | Argentina | Originally described as a ceratopsian but this identity is today doubted | |
Notocolossus | 2016 | Plottier Formation (Late Cretaceous, Coniacian to Santonian) | Argentina | Unusually for a sauropod, its unguals were truncated | |
Notohypsilophodon | 1998 | Bajo Barreal Formation (Late Cretaceous, Cenomanian to Turonian) | Argentina | Only known from a skull-less, juvenile skeleton | |
Nullotitan | 2019 | Chorrillo Formation (Late Cretaceous, Campanian to Maastrichtian) | Argentina | Would have niche-partitioned with smaller ornithopods | |
Orkoraptor | 2008 | Cerro Fortaleza Formation (Late Cretaceous, Campanian) | Argentina | Had highly specialized dentition similar to that of maniraptorans | |
Overoraptor | 2020 | Huincul Formation (Late Cretaceous, Cenomanian) | Argentina | Shows adaptations for both flight and cursoriality | |
Overosaurus | 2013 | Bajo de la Carpa Formation (Late Cretaceous, Santonian) | Argentina | One of the smallest known aeolosaurins | |
Padillasaurus | 2015 | Paja Formation (Early Cretaceous, Barremian) | Colombia | Originally described as a brachiosaurid[43] although it could also be a somphospondylian[44] | |
Pampadromaeus | 2011 | Santa Maria Formation (Late Triassic, Carnian) | Brazil | Some features of its jaws are similar to those of theropods | |
Pamparaptor | 2011 | Portezuelo Formation (Late Cretaceous, Turonian to Coniacian) | Argentina | Had a troodontid-like metatarsal | |
Panamericansaurus | 2010 | Allen Formation (Late Cretaceous, Campanian to Maastrichtian) | Argentina | Known from a single partial skeleton | |
Pandoravenator | 2017 | Cañadón Calcáreo Formation (Late Jurassic, Oxfordian to Tithonian) | Argentina | Inconsistent in phylogenetic placement | |
Panphagia | 2009 | Ischigualasto Formation (Late Triassic, Carnian) | Argentina | Was omnivorous as indicated by its heterodont dentition | |
Patagonykus | 1996 | Portezuelo Formation (Late Cretaceous, Turonian to Coniacian) | Argentina | Its discovered allowed researchers to connect Alvarezsaurus and parvicursorines[45] | |
Patagopelta | 2022 | Allen Formation (Late Cretaceous, Campanian to Maastrichtian) | Argentina | The first nodosaurid recovered from South America | |
Patagosaurus | 1979 | Cañadón Asfalto Formation (Early Jurassic, Toarcian) | Argentina | Known from remains of adults and juveniles, depicting how various features developed in sauropods as they aged | |
Patagotitan | 2017 | Cerro Barcino Formation (Early Cretaceous, Albian) | Argentina | One of the largest dinosaurs known from reasonably complete remains | |
Pellegrinisaurus | 1996 | Allen Formation (Late Cretaceous, Campanian to Maastrichtian) | Argentina | May have lived inland unlike other contemporaneous titanosaurs[46] | |
Perijasaurus | 2022 | La Quinta Formation (Early Jurassic to Middle Jurassic, Toarcian to Aalenian) | Colombia | Only known from a single vertebra | |
Petrobrasaurus | 2011 | Plottier Formation (Late Cretaceous, Coniacian to Santonian) | Argentina | Shares somes features with lognkosaurs, but its membership within this clade cannot be confirmed | |
Piatnitzkysaurus | 1979 | Cañadón Asfalto Formation (Early Jurassic, Toarcian) | Argentina | One of the few early theropods with a well-preserved braincase | |
Pilmatueia | 2019 | Mulichinco Formation (Early Cretaceous, Valanginian) | Argentina | Had elongated spines on its cervical vertebrae, although they weren't as those of Amargasaurus and Bajadasaurus[47] | |
Pitekunsaurus | 2008 | Anacleto Formation (Late Cretaceous, Campanian) | Argentina | Known from several bones from different parts of the body, including a braincase | |
Powellvenator | 2017 | Los Colorados Formation (Late Triassic, Norian) | Argentina | Some of this genus' remains were originally associated with those of a pseudosuchian[48] | |
Puertasaurus | 2005 | Cerro Fortaleza Formation (Late Cretaceous, Campanian to Maastrichtian) | Argentina | Large but only known from very few remains | |
Punatitan | 2020 | Ciénaga del Río Huaco Formation (Late Cretaceous, Campanian to Maastrichtian) | Argentina | Contemporary with Bravasaurus but was most likely distantly related[49] | |
Pycnonemosaurus | 2002 | Unnamed formation (Late Cretaceous, Maastrichtian) | Brazil | Potentially the largest known abelisaurid[50] | |
Quetecsaurus | 2014 | Lisandro Formation (Late Cretaceous, Turonian) | Argentina | Its humerus was uniquely-shaped | |
Quilmesaurus | 2001 | Allen Formation (Late Cretaceous, Campanian to Maastrichtian) | Argentina | Had proportionally robust legs despite its small size | |
Rayososaurus | 1996 | Candeleros Formation (Late Cretaceous, Cenomanian) | Argentina | Very similar to Rebbachisaurus despite only being known from scant remains | |
Rinconsaurus | 2003 | Bajo de la Carpa Formation (Late Cretaceous, Santonian) | Argentina | Unusually, its caudal vertebrae had a repeating pattern of procoely, amphicoely, opisthocoely, and biconvex states | |
Riojasaurus | 1969 | Los Colorados Formation (Late Triassic, Norian) | Argentina | Although commonly depicted as quadrupedal, the structure of its shoulder girdle suggests it may potentially be bipedal | |
Rocasaurus | 2000 | Allen Formation (Late Cretaceous, Campanian to Maastrichtian) | Argentina | Small for a sauropod yet was very robust | |
Saltasaurus | 1980 | Lecho Formation (Late Cretaceous, Maastrichtian) | Argentina | Possessed osteoderms in the form of large round nodules connected by a mass of smaller plates | |
Sanjuansaurus | 2010 | Ischigualasto Formation (Late Triassic, Carnian) | Argentina | Coexisted with Herrerasaurus but most likely represents a separate taxon | |
Santanaraptor | 1999 | Romualdo Formation (Early Cretaceous, Aptian to Albian) | Brazil | Preserves soft tissues including the remains of skin, muscle, and possibly blood vessels[51][52] | |
Sarmientosaurus | 2016 | Bajo Barreal Formation (Late Cretaceous, Cenomanian to Turonian) | Argentina | Analysis of its inner ear suggests it held its head downwards, possibly indicating a preference for low-growing plants | |
Saturnalia | 1999 | Santa Maria Formation (Late Triassic, Carnian) | Brazil | Known from at least three partial skeletons | |
Secernosaurus | 1979 | Lago Colhué Huapí Formation (Late Cretaceous, Campanian to Maastrichtian) | Argentina | Would have lived in an arid gypsum desert[53] | |
Sektensaurus | 2019 | Lago Colhué Huapí Formation (Late Cretaceous, Campanian) | Argentina | The first non-hadrosaurid ornithopod recovered from central Patagonia | |
Skorpiovenator | 2009 | Huincul Formation (Late Cretaceous, Cenomanian to Turonian) | Argentina | Had an unusually short and deep skull | |
Spectrovenator | 2020 | Quiricó Formation (Early Cretaceous, Barremian to Aptian) | Brazil | Its holotype was found underneath a sauropod skeleton | |
Staurikosaurus | 1970 | Santa Maria Formation (Late Triassic, Carnian to Norian) | Brazil | May have been a rare component of its environment as only two specimens are known | |
Stegouros | 2021 | Dorotea Formation (Late Cretaceous, Campanian to Maastrichtian) | Chile | Possessed a "macuahuitl" at the end of its tail, made of a connected "frond" of pointed osteoderms | |
Tachiraptor | 2014 | La Quinta Formation (Early Jurassic, Hettangian) | Venezuela | Closely related to ceratosaurs and tetanurans[54] | |
Talenkauen | 2004 | Cerro Fortaleza Formation (Late Cretaceous, Campanian to Maastrichtian) | Argentina | May have practiced parental care as an adult and a hatchling have been found together | |
Tapuiasaurus | 2011 | Quiricó Formation (Early Cretaceous, Aptian) | Brazil | One of the few titanosaurs of which a complete skull is known | |
Taurovenator | 2016 | Huincul Formation (Late Cretaceous, Cenomanian to Turonian) | Argentina | Only known from a single postorbital. May be synonymous with Mapusaurus[55] | |
Tehuelchesaurus | 1999 | Cañadón Calcáreo Formation (Late Jurassic, Oxfordian to Tithonian) | Argentina | Preserves impressions of scaly skin | |
Thanos | 2020 | São José do Rio Preto Formation (Late Cretaceous, Santonian) | Brazil | Only known from a single vertebra. The generic name honors the Marvel Comics villain Thanos | |
Tralkasaurus | 2020 | Huincul Formation (Late Cretaceous, Cenomanian to Turonian) | Argentina | Exhibits a conflict blend of characteristics from basal and derived abelisauroids | |
Tratayenia | 2018 | Bajo de la Carpa Formation (Late Cretaceous, Santonian) | Argentina | One of the youngest known megaraptorans[56] | |
Traukutitan | 2011 | Bajo de la Carpa Formation (Late Cretaceous, Santonian) | Argentina | Retained basal features in its caudal vertebrae despite its late age | |
Trigonosaurus | 2005 | Serra da Galga Formation (Late Cretaceous, Maastrichtian) | Brazil | Potentially synonymous with Baurutitan[13] | |
Triunfosaurus | 2017 | Rio Piranhas Formation (Early Cretaceous, Berriasian to Valanginian) | Brazil | Originally described as a titanosaur[57] but similarities have been noted with basal somphospondylians[58] | |
Tyrannotitan | 2005 | Cerro Barcino Formation (Early Cretaceous, Aptian) | Argentina | Unlike other carcharodontosaurids, its sacral and caudal vertebrae were not pneumatic | |
Uberabatitan | 2008 | Serra da Galga Formation (Late Cretaceous, Maastrichtian) | Brazil | Several individuals are known, some of which are very large | |
Unaysaurus | 2004 | Caturrita Formation (Late Triassic, Carnian to Norian) | Brazil | Described as the first plateosaurid-grade sauropodomorph from Brazil | |
Unenlagia | 1997 | Portezuelo Formation (Late Cretaceous, Coniacian) | Argentina | Could potentially be adapted for flapping due to the structure of its shoulder girdle[59] | |
Unquillosaurus | 1979 | Los Blanquitos Formation (Late Cretaceous, Campanian) | Argentina | Has been suggested to be a dromaeosaurid[60] or a carcharodontosaurid[61] | |
Velocisaurus | 1991 | Bajo de la Carpa Formation (Late Cretaceous, Santonian) | Argentina | Unusually, its third metatarsal is the thickest, which may be an adaptation to running | |
Vespersaurus | 2019 | Rio Paraná Formation (Late Cretaceous) | Brazil | Possessed raised claws on its second and fourth toes, making it functionally monodactyl, a possible adaptation to its desert habitat | |
Viavenator | 2016 | Bajo de la Carpa Formation (Late Cretaceous, Santonian) | Argentina | May have relied on quick movements of its head and gaze stabilization when hunting | |
Volkheimeria | 1979 | Cañadón Asfalto Formation (Early Jurassic, Toarcian) | Argentina | Coexisted with at least three other eusauropods | |
Willinakaqe | 2010 | Allen Formation (Late Cretaceous, Campanian to Maastrichtian) | Argentina | As originally described, it represented a chimera of two different taxa, one of which was later named Bonapartesaurus[62] | |
Xenotarsosaurus | 1986 | Bajo Barreal Formation (Late Cretaceous, Cenomanian to Turonian) | Argentina | Had an unusually-shaped astragalus and calcaneum | |
Yamanasaurus | 2019 | Río Playas Formation (Late Cretaceous, Maastrichtian) | Ecuador | The northernmost saltasaurine known to date[49] | |
Ypupiara | 2021 | Serra da Galga Formation (Late Cretaceous, Maastrichtian) | Brazil | May have been a piscivore due to the shape of its teeth[63] | |
Zapalasaurus | 2006 | La Amarga Formation (Early Cretaceous, Hauterivian to Aptian) | Argentina | Known from an incomplete skeleton, including several caudal vertebrae | |
Zupaysaurus | 2003 | Los Colorados Formation (Late Triassic, Norian) | Argentina | Although commonly depicted with head crests, they may in fact be misplaced lacrimal bones[64] |
Invalid and potentially valid genera Edit
- Angaturama limai: Only known from the tip of the snout. It may belong to the contemporary Irritator, but it could also represent its own taxon.
- "Bayosaurus pubica": An abelisaurid known from partial postcranial remains.
- Oxalaia quilombensis: Potentially a junior synonym of Spinosaurus.
- "Ubirajara jubatus": Known from a single specimen that preserves impressions of feathers, including display feathers on its sides. Its description was retracted before it could be published due to allegations that the specimen was illegally exported from Brazil.
Timeline Edit
This is a timeline of selected dinosaurs from the list above. Time is measured in Ma, megaannum, along the x-axis. Carnivores are shown in red, herbivores in green and omnivores in blue.
See also Edit
References Edit
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- ^ Poropat, S.F.; Nair, J.P.; Syme, C.E.; Mannion, P.D.; Upchurch, P.; Hocknull, S.A.; Cook, A.G.; Tischler, T.R.; Holland, T. (2017). "Reappraisal of Austrosaurus mckillopi Longman, 1933 from the Allaru Mudstone of Queensland, Australia's first named Cretaceous sauropod dinosaur" (PDF). Alcheringa. 41 (4): 543–580. doi:10.1080/03115518.2017.1334826. hdl:10044/1/48659. S2CID 134237391.
- ^ Gianechini, F. A.; Apesteguía, S. (2011). "Unenlagiinae revisited: Dromaeosaurid theropods from South America
list, south, american, dinosaurs, this, list, dinosaurs, whose, remains, have, been, recovered, from, south, america, contents, criteria, inclusion, valid, genera, invalid, potentially, valid, genera, timeline, also, referencescriteria, inclusion, editthe, gen. This is a list of dinosaurs whose remains have been recovered from South America Contents 1 Criteria for inclusion 2 List of South American dinosaurs 2 1 Valid genera 2 2 Invalid and potentially valid genera 3 Timeline 4 See also 5 ReferencesCriteria for inclusion EditThe genus must appear on the List of dinosaur genera At least one named species of the creature must have been found in South America This list is a complement to Category Mesozoic dinosaurs of South America List of South American dinosaurs EditValid genera Edit Name Year Formation Location Notes ImagesAbelisaurus 1985 Allen Formation Anacleto Formation Late Cretaceous Campanian nbsp Argentina Only known from a single partial skull nbsp Achillesaurus 2007 Bajo de la Carpa Formation Late Cretaceous Santonian nbsp Argentina Potentially a junior synonym of Alvarezsaurus 1 nbsp Adamantisaurus 2006 Adamantina Formation Late Cretaceous Turonian to Maastrichtian nbsp Brazil Derived for a titanosaur as indicated by the ball and socket articulations of its caudal vertebrae nbsp Adeopapposaurus 2009 Canon del Colorado Formation Early Jurassic Hettangian to Pliensbachian nbsp Argentina May have had a keratinous beak based on the shape of its jaw bones nbsp Aeolosaurus 1987 Allen Formation Angostura Colorada Formation Lago Colhue Huapi Formation Los Alamitos Formation Late Cretaceous Campanian to Maastrichtian nbsp Argentina nbsp Brazil Known from the remains of several individuals nbsp Aerosteon 2009 Anacleto Formation Plottier Formation Late Cretaceous Coniacian to Campanian nbsp Argentina Its bones were extensively pneumatized suggesting an air sac system like those of modern birds nbsp Agustinia 1999 Lohan Cura Formation Early Cretaceous Aptian to Albian nbsp Argentina Originally described as possessing long vaguely stegosaur like spikes although these turned out to be fragments of ribs and other bones 2 Alnashetri 2012 Candeleros Formation Late Cretaceous Cenomanian nbsp Argentina The oldest alvarezsauroid known from South AmericaAlvarezsaurus 1991 Bajo de la Carpa Formation Late Cretaceous Santonian nbsp Argentina One of the largest known alvarezsaurids nbsp Amargasaurus 1991 La Amarga Formation Early Cretaceous Barremian to Aptian nbsp Argentina Possessed two parallel rows of backward pointing spines on its neck that may have been covered by keratin sheaths 3 or a skin sail 4 nbsp Amargatitanis 2007 La Amarga Formation Early Cretaceous Barremian to Aptian nbsp Argentina Originally described as a titanosaur 5 although it has since been reinterpreted as a dicraeosaurid 6 nbsp Amazonsaurus 2003 Itapecuru Formation Early Cretaceous Aptian to Albian nbsp Brazil Had tall neural spines on its caudal vertebrae nbsp Amygdalodon 1947 Cerro Carnerero Formation Early Jurassic Toarcian nbsp Argentina Its teeth were shaped like almonds nbsp Anabisetia 2002 Lisandro Formation Late Cretaceous Cenomanian to Turonian nbsp Argentina Four specimens are known but the skull remains incompletely known nbsp Andesaurus 1991 Candeleros Formation Late Cretaceous Cenomanian nbsp Argentina Several osteological features indicate a basal position within the Titanosauria nbsp Aniksosaurus 2006 Bajo Barreal Formation Late Cretaceous Cenomanian to Turonian nbsp Argentina Bone bed remains suggest a gregarious lifestyle 7 nbsp Antarctosaurus 1929 Anacleto Formation Plottier Formation Late Cretaceous Coniacian to Campanian nbsp Argentina nbsp Brazil Multiple specimens have been assigned to this genus including some from outside South America but most may not represent the same taxon nbsp Aoniraptor 2016 Huincul Formation Late Cretaceous Cenomanian to Turonian nbsp Argentina Either a valid megaraptoran or a synonym of Gualicho 8 Arackar 2021 Hornitos Formation Late Cretaceous Campanian to Maastrichtian nbsp Chile The most complete sauropod known from Chile nbsp Aratasaurus 2020 Romualdo Formation Early Cretaceous Albian nbsp Brazil All three of its toes were symmetric nbsp Argentinosaurus 1993 Huincul Formation Late Cretaceous Cenomanian to Turonian nbsp Argentina May be the largest known dinosaur nbsp Argyrosaurus 1893 Lago Colhue Huapi Formation Late Cretaceous Campanian to Maastrichtian nbsp Argentina Several remains were historically assigned to this genus but only the holotype can be confidently assigned to it 9 nbsp Arrudatitan 2021 Adamantina Formation Late Cretaceous Campanian to Maastrichtian nbsp Brazil Its tail probably curved strongly downward with the tip held very low to the ground 10 nbsp Asfaltovenator 2019 Canadon Asfalto Formation Early Jurassic Toarcian nbsp Argentina Combines traits of both megalosauroids and allosauroids Its describers suggest paraphyly of the former group 11 nbsp Atacamatitan 2011 Tolar Formation Late Cretaceous nbsp Chile Only known from a single fragmentary skeleton nbsp Aucasaurus 2002 Anacleto Formation Late Cretaceous Santonian to Campanian nbsp Argentina Known from almost the entire skeleton including most of the skull nbsp Austrocheirus 2010 Cerro Fortaleza Formation Late Cretaceous Campanian nbsp Argentina Unusually for an abelisauroid its arms were relatively long nbsp Austroposeidon 2016 Presidente Prudente Formation Late Cretaceous Campanian to Maastrichtian nbsp Brazil The largest dinosaur known from Brazil nbsp Austroraptor 2008 Allen Formation Late Cretaceous Campanian to Maastrichtian nbsp Argentina Possessed an elongated snout paralleling that of spinosaurids nbsp Baalsaurus 2018 Portezuelo Formation Late Cretaceous Turonian to Coniacian nbsp Argentina Had a squared off dentary with its teeth crowded to the frontBagualia 2020 Canadon Asfalto Formation Early Jurassic Toarcian nbsp Argentina Represents an early radiation of eusauropods that displaced earlier basal sauropodomorphs after a global warming event 12 nbsp Bagualosaurus 2018 Santa Maria Formation Late Triassic Carnian nbsp Brazil Its hindlimbs were very robust nbsp Bajadasaurus 2019 Bajada Colorada Formation Early Cretaceous Berriasian to Valanginian nbsp Argentina Possessed elongated forward pointing spines erupting in pairs from the neck nbsp Barrosasaurus 2009 Anacleto Formation Late Cretaceous Campanian nbsp Argentina Only known from three vertebrae but are well preserved enough to warrant recognition as a distinct genus nbsp Baurutitan 2005 Serra da Galga Formation Late Cretaceous Campanian nbsp Brazil Originally described from an associated series of nineteen vertebrae new remains were discovered later 13 nbsp Berthasaura 2021 Goio Ere Formation Early Cretaceous Aptian to Albian nbsp Brazil Possessed a short toothless beak indicating a herbivorous or omnivorous diet nbsp Bicentenaria 2012 Candeleros Formation Late Cretaceous Cenomanian nbsp Argentina Several individuals were preserved together suggesting a gregarious lifestyle 14 nbsp Bonapartenykus 2012 Allen Formation Late Cretaceous Campanian to Maastrichtian nbsp Argentina Its holotype was preserved with two eggs that may have been within its oviducts when it died 15 nbsp Bonapartesaurus 2017 Allen Formation Late Cretaceous Campanian to Maastrichtian nbsp Argentina Represents an endemic South American clade of hadrosaurids 16 Bonatitan 2004 Allen Formation Late Cretaceous Campanian to Maastrichtian nbsp Argentina Analysis of its inner ear suggests a decreased range of head movements compared to other sauropods 17 Bonitasaura 2004 Bajo de la Carpa Formation Late Cretaceous Santonian nbsp Argentina The proportions of its body were somewhat similar to those of diplodocoids likely through convergent evolution nbsp Brachytrachelopan 2005 Canadon Calcareo Formation Late Jurassic Oxfordian to Tithonian nbsp Argentina Possessed the shortest neck of any known sauropod nbsp Brasilotitan 2013 Adamantina Formation Late Cretaceous Maastrichtian nbsp Brazil Had an L shaped dentary similar to that of Antarctosaurus and BonitasauraBravasaurus 2020 Cienaga del Rio Huaco Formation Late Cretaceous Campanian to Maastrichtian nbsp Argentina Discovered close to a large concentration of titanosaur eggsBuitreraptor 2005 Candeleros Formation Late Cretaceous Cenomanian to Turonian nbsp Argentina May have been a pursuit predator due to its long legs 18 nbsp Buriolestes 2016 Santa Maria Formation Late Triassic Carnian nbsp Brazil Unlike all other sauropodomorphs it was completely carnivorous with serrated teeth to match nbsp Caieiria 2022 Serra da Galga Formation Late Cretaceous Maastrichtian nbsp Brazil Its caudal vertebrae had an unusual anatomy nbsp Campylodoniscus 1961 Bajo Barreal Formation Late Cretaceous Cenomanian nbsp Argentina Only known from a single maxilla with seven teeth nbsp Carnotaurus 1985 La Colonia Formation Late Cretaceous Maastrichtian nbsp Argentina Possessed a pair of short horns on the top of its skull nbsp Cathartesaura 2005 Huincul Formation Late Cretaceous Cenomanian nbsp Argentina Had a well muscled neck although it could not move strongly up or down nbsp Chilesaurus 2015 Toqui Formation Late Jurassic Tithonian nbsp Chile Combines traits of theropods sauropodomorphs and ornithischians with far reaching implications for the evolution of the Dinosauria nbsp Choconsaurus 2017 Huincul Formation Late Cretaceous Cenomanian nbsp Argentina One of the more completely known basal titanosaurs nbsp Chromogisaurus 2010 Ischigualasto Formation Late Triassic Carnian nbsp Argentina Its discovery suggests that early dinosaurs were more diverse than previously thought nbsp Chubutisaurus 1975 Cerro Barcino Formation Early Cretaceous Albian nbsp Argentina Unusually its forelimbs were shorter than its hindlimbs 19 nbsp Chucarosaurus 2023 Huincul Formation Late Cretaceous Cenomanian to Turonian nbsp Argentina A large colossosaurian titanosaur 20 nbsp Clasmodosaurus 1898 Bajo Barreal Formation Late Cretaceous Cenomanian to Turonian nbsp Argentina Similarly to Bonitasaura its teeth were polygonal in cross sectionColoradisaurus 1990 Los Colorados Formation Late Triassic Norian nbsp Argentina Originally called Coloradia although that genus name is occupied by a moth nbsp Comahuesaurus 2012 Lohan Cura Formation Early Cretaceous Aptian to Albian nbsp Argentina Its holotype was originally assigned to Limaysaurus but it was named as a separate genus due to several morphological differences nbsp Condorraptor 2005 Canadon Asfalto Formation Early Jurassic Toarcian nbsp Argentina Closely related to the coeval Piatnitzkysaurus but could be distinguished by several osteological features nbsp Dreadnoughtus 2014 Cerro Fortaleza Formation Late Cretaceous Campanian to Maastrichtian nbsp Argentina The heaviest land animal whose mass can be calculated with reasonable certainty nbsp Drusilasaura 2011 Bajo Barreal Formation Late Cretaceous Cenomanian to Turonian nbsp Argentina Potentially the oldest known member of the lognkosaurian lineage 21 nbsp Ekrixinatosaurus 2004 Candeleros Formation Late Cretaceous Cenomanian nbsp Argentina Had robust bones indicating a massive build and a greater resistance to injuries 22 nbsp Elaltitan 2012 Bajo Barreal Formation Late Cretaceous Cenomanian to Turonian nbsp Argentina Extremely large as indicated by its long femur nbsp Elemgasem 2022 Portezuelo Formation Late Cretaceous Turonian to Coniacian nbsp Argentina The first abelisaurid known from the Turonian Coniacian intervalEoabelisaurus 2012 Canadon Asfalto Formation Early Jurassic Toarcian nbsp Argentina Shows a transitional arm morphology for an abelisauroid with a shortened lower arm and hand but an unreduced humerus nbsp Eodromaeus 2011 Ischigualasto Formation Late Triassic Carnian nbsp Argentina Well adapted for cursoriality despite its early age 23 nbsp Eoraptor 1993 Ischigualasto Formation Late Triassic Carnian nbsp Argentina Possessed different types of teeth suggesting it was omnivorous nbsp Epachthosaurus 1990 Bajo Barreal Formation Late Cretaceous Cenomanian to Turonian nbsp Argentina Its caudal vertebrae were procoelous i e concave at the front and convex at the back nbsp Erythrovenator 2021 Candelaria Formation Late Triassic Carnian to Norian nbsp Brazil Known from the Riograndia Assemblage Zone an area which is unusually dominated by cynodonts nbsp Futalognkosaurus 2007 Portezuelo Formation Late Cretaceous Coniacian nbsp Argentina Possessed meter deep cervical vertebrae with distinctive shark fin shaped neural spines nbsp Gasparinisaura 1996 Anacleto Formation Late Cretaceous Campanian nbsp Argentina Known from specimens of both adults and juveniles nbsp Genyodectes 1901 Cerro Barcino Formation Early Cretaceous Aptian to Albian nbsp Argentina Had extremely large and protruding teeth nbsp Giganotosaurus 1995 Candeleros Formation Late Cretaceous Cenomanian nbsp Argentina One of the largest known terrestrial carnivorous dinosaurs nbsp Gnathovorax 2019 Santa Maria Formation Late Triassic Carnian nbsp Brazil Known from a well preserved almost complete skeleton nbsp Gondwanatitan 1999 Adamantina Formation Late Cretaceous Maastrichtian nbsp Brazil For a titanosaur it had relatively gracile limb bones nbsp Gonkoken 2023 Dorotea Formation Late Cretaceous Campanian to Maastrichtian nbsp Chile It exhibits a blend of derived hadrosaurid traits and ancestral hadrosauroid traits nbsp Guaibasaurus 1999 Caturrita Formation Late Triassic Norian nbsp Brazil Combines features of both early theropods and sauropodomorphs nbsp Gualicho 2016 Huincul Formation Late Cretaceous Cenomanian to Turonian nbsp Argentina Originally described as having highly reduced arms with only two fingers convergent with tyrannosaurids although one study suggests a third finger was present 24 nbsp Guemesia 2022 Los Blanquitos Formation Late Cretaceous Campanian nbsp Argentina Unlike other abelisaurids it lacked ornamentation on its skull 25 nbsp Herrerasaurus 1963 Ischigualasto Formation Late Triassic Carnian nbsp Argentina One of the largest early carnivorous dinosaurs Usually considered a basal saurischian but may be just outside Dinosauria 26 nbsp Huallasaurus 2022 Los Alamitos Formation Late Cretaceous Santonian to Maastrichtian nbsp Argentina Remains originally misidentified as belonging to a southern species of Kritosaurus nbsp Huinculsaurus 2020 Huincul Formation Late Cretaceous Cenomanian to Turonian nbsp Argentina The youngest known elaphrosaurine nbsp Ibirania 2022 Sao Jose do Rio Preto Formation Late Cretaceous Santonian to Campanian nbsp Brazil May have attained its small size due to its arid inland habitat unlike other titanosaurs which were affected by insular dwarfism 27 nbsp Ilokelesia 1998 Huincul Formation Late Cretaceous Cenomanian nbsp Argentina Its skull retains some basal abelisauroid traitsIngentia 2018 Quebrada del Barro Formation Late Triassic Norian to Rhaetian nbsp Argentina The earliest known very large sauropodomorph 28 nbsp Irritator 1996 Romualdo Formation Early Cretaceous Albian nbsp Brazil May have been the apex predator of its habitat hunting both aquatic and terrestrial prey 29 nbsp Isaberrysaura 2017 Los Molles Formation Middle Jurassic Bajocian nbsp Argentina Preserves gut contents including whole seeds nbsp Isasicursor 2019 Chorrillo Formation Late Cretaceous Campanian to Maastrichtian nbsp Argentina Four individuals of different ages were found together suggesting it lived in herds 30 nbsp Itapeuasaurus 2019 Alcantara Formation Late Cretaceous Cenomanian nbsp Brazil Only known from six vertebrae nbsp Jakapil 2022 Candeleros Formation Late Cretaceous Cenomanian nbsp Argentina Represents a novel lineage of basal thyreophorans characterized by small size deep jaws and a bipedal stance nbsp Kaijutitan 2019 Sierra Barrosa Formation Late Cretaceous Coniacian nbsp Argentina One of the latest surviving basal titanosaursKatepensaurus 2013 Bajo Barreal Formation Late Cretaceous Cenomanian to Turonian nbsp Argentina Distinguished by a certain opening in its dorsal vertebrae nbsp Kelumapusaura 2022 Allen Formation Late Cretaceous Campanian to Maastrichtian nbsp Argentina Known from the remains of various individuals nbsp Kurupi 2021 Marilia Formation Late Cretaceous Maastrichtian nbsp Brazil Would have had a stiff tail as indicated by the anatomy of its caudal vertebrae nbsp Lajasvenator 2020 Mulichinco Formation Early Cretaceous Valanginian nbsp Argentina One of the smallest known allosauroids nbsp Lapampasaurus 2012 Allen Formation Late Cretaceous Campanian to Maastrichtian nbsp Argentina Known from a partial skeleton lacking the skullLaplatasaurus 1929 Anacleto Formation Late Cretaceous Campanian nbsp Argentina Osteoderms have been assigned to this taxon although this referral is uncertain nbsp Laquintasaura 2014 La Quinta Formation Early Jurassic Hettangian nbsp Venezuela One study recovered it as a basal thyreophoran 31 despite the fact no osteoderms have been found nbsp Lavocatisaurus 2018 Rayoso Formation Early Cretaceous Aptian to Albian nbsp Argentina May have possessed a keratinous beak 32 nbsp Leinkupal 2014 Bajada Colorada Formation Early Cretaceous Berriasian to Valanginian nbsp Argentina The youngest known diplodocid nbsp Leonerasaurus 2011 Las Leoneras Formation Early Jurassic nbsp Argentina Has an unusual combination of basal and derived traits nbsp Lessemsaurus 1999 Los Colorados Formation Late Triassic Norian nbsp Argentina Grew very large despite lacking the anatomical traits usually seen as supporting gigantism 28 nbsp Leyesaurus 2011 Quebrada del Barro Formation Early Jurassic Hettangian to Toarcian nbsp Argentina Had an unusually small skull nbsp Ligabueino 1996 La Amarga Formation Early Cretaceous Barremian to Aptian nbsp Argentina Known from a single very small juvenile skeletonLigabuesaurus 2006 Lohan Cura Formation Early Cretaceous Aptian to Albian nbsp Argentina Its forelimbs were extremely long with similar proportions to those of brachiosaurids 33 nbsp Limaysaurus 2004 Candeleros Formation Huincul Formation Late Cretaceous Cenomanian nbsp Argentina Possessed elongated neural spines on its dorsal vertebrae nbsp Llukalkan 2021 Bajo de la Carpa Formation Late Cretaceous Santonian nbsp Argentina May have had a keen sense of hearing due to the shape of its ear 34 Loncosaurus 1899 Cardiel Formation Metasiete Formation Late Cretaceous Campanian to Maastrichtian nbsp Argentina Poorly knownLoricosaurus 1929 Allen Formation Late Cretaceous Maastrichtian nbsp Argentina Potentially synonymous with Neuquensaurus or SaltasaurusLucianovenator 2017 Quebrada del Barro Formation Late Triassic Norian to Rhaetian nbsp Argentina One of the few theropods known from the Rhaetian nbsp Macrocollum 2018 Candelaria Formation Late Triassic Norian nbsp Brazil One of the oldest sauropodomorphs with an extremely elongated neck nbsp Macrogryphosaurus 2007 Sierra Barrosa Formation Late Cretaceous Coniacian nbsp Argentina Preserves a series of mineralized plates along the side of the torso nbsp Mahuidacursor 2019 Bajo de la Carpa Formation Late Cretaceous Santonian nbsp Argentina Its holotype was sexually mature but not fully grownMaip 2022 Chorrillo Formation Late Cretaceous Maastrichtian nbsp Argentina The largest youngest and most completely known megaraptoran nbsp Malarguesaurus 2008 Portezuelo Formation Late Cretaceous Turonian to Coniacian nbsp Argentina Large and robustly builtManidens 2011 Canadon Asfalto Formation Early Jurassic Toarcian nbsp Argentina May have been arboreal due to the structure of its feet with toes adapted for grasping 35 nbsp Mapusaurus 2006 Huincul Formation Late Cretaceous Cenomanian to Turonian nbsp Argentina At least seven specimens of different growth stages are known possibly suggesting that lived and or hunted in packs nbsp Maxakalisaurus 2006 Adamantina Formation Late Cretaceous Maastrichtian nbsp Brazil Unusually for a sauropod it had ridged teeth nbsp Megaraptor 1998 Portezuelo Formation Late Cretaceous Turonian to Coniacian nbsp Argentina Possessed a large strongly curved claw on its first finger nbsp Mendozasaurus 2003 Sierra Barrosa Formation Late Cretaceous Coniacian nbsp Argentina Had spherical osteoderms that were probably located in rows along the flanks 36 nbsp Menucocelsior 2022 Allen Formation Late Cretaceous Maastrichtian nbsp Argentina Coexisted with multiple other titanosaurs that may have niche partitioned 37 Meraxes 2022 Huincul Formation Late Cretaceous Cenomanian nbsp Argentina Possessed reduced forelimbs convergent with several other groups of theropods nbsp Microcoelus 1893 Bajo de la Carpa Formation Late Cretaceous Santonian to Campanian nbsp Argentina May be a synonym of Neuquensaurus nbsp Mirischia 2004 Romualdo Formation Early Cretaceous Albian nbsp Brazil Its holotype preserves an intestine nbsp Murusraptor 2016 Sierra Barrosa Formation Late Cretaceous Coniacian nbsp Argentina Had a brain morphology similar to that of tyrannosaurids but its sensory capabilities were closer to the level of allosauroids 38 nbsp Mussaurus 1979 Laguna Colorada Formation Early Jurassic Pliensbachian nbsp Argentina Multiple specimens from different growth stages are known Juveniles may have been quadrupedal and shifted to bipedality as adults 39 nbsp Muyelensaurus 2007 Plottier Formation Late Cretaceous Coniacian to Santonian nbsp Argentina Relatively gracile for a titanosaurNarambuenatitan 2011 Anacleto Formation Late Cretaceous Campanian nbsp Argentina Its neural spines are very similar to those of EpachthosaurusNeuquenraptor 2005 Portezuelo Formation Late Cretaceous Coniacian nbsp Argentina Potentially synonymous with Unenlagia 40 nbsp Neuquensaurus 1992 Anacleto Formation Late Cretaceous Campanian nbsp Argentina nbsp Uruguay One of the smallest known titanosaurs nbsp Nhandumirim 2019 Santa Maria Formation Late Triassic Carnian nbsp Brazil Originally described as a theropod 41 but has since been reinterpreted as a sauropodomorph 42 nbsp Niebla 2020 Allen Formation Late Cretaceous Campanian to Maastrichtian nbsp Argentina Had a uniquely built scapulocoracoid very similar to that of Carnotaurus nbsp Ninjatitan 2021 Bajada Colorada Formation Early Cretaceous Berriasian to Valanginian nbsp Argentina The oldest known titanosaurNoasaurus 1980 Lecho Formation Late Cretaceous Campanian to Maastrichtian nbsp Argentina Originally mistakenly believed to have possessed a dromaeosaurid like sickle claw nbsp Nopcsaspondylus 2007 Candeleros Formation Late Cretaceous Cenomanian nbsp Argentina Named from a single lost vertebra nbsp Notoceratops 1918 Lago Colhue Huapi Formation Late Cretaceous Campanian to Maastrichtian nbsp Argentina Originally described as a ceratopsian but this identity is today doubted nbsp Notocolossus 2016 Plottier Formation Late Cretaceous Coniacian to Santonian nbsp Argentina Unusually for a sauropod its unguals were truncated nbsp Notohypsilophodon 1998 Bajo Barreal Formation Late Cretaceous Cenomanian to Turonian nbsp Argentina Only known from a skull less juvenile skeletonNullotitan 2019 Chorrillo Formation Late Cretaceous Campanian to Maastrichtian nbsp Argentina Would have niche partitioned with smaller ornithopods nbsp Orkoraptor 2008 Cerro Fortaleza Formation Late Cretaceous Campanian nbsp Argentina Had highly specialized dentition similar to that of maniraptorans nbsp Overoraptor 2020 Huincul Formation Late Cretaceous Cenomanian nbsp Argentina Shows adaptations for both flight and cursorialityOverosaurus 2013 Bajo de la Carpa Formation Late Cretaceous Santonian nbsp Argentina One of the smallest known aeolosaurins nbsp Padillasaurus 2015 Paja Formation Early Cretaceous Barremian nbsp Colombia Originally described as a brachiosaurid 43 although it could also be a somphospondylian 44 nbsp Pampadromaeus 2011 Santa Maria Formation Late Triassic Carnian nbsp Brazil Some features of its jaws are similar to those of theropods nbsp Pamparaptor 2011 Portezuelo Formation Late Cretaceous Turonian to Coniacian nbsp Argentina Had a troodontid like metatarsal nbsp Panamericansaurus 2010 Allen Formation Late Cretaceous Campanian to Maastrichtian nbsp Argentina Known from a single partial skeletonPandoravenator 2017 Canadon Calcareo Formation Late Jurassic Oxfordian to Tithonian nbsp Argentina Inconsistent in phylogenetic placementPanphagia 2009 Ischigualasto Formation Late Triassic Carnian nbsp Argentina Was omnivorous as indicated by its heterodont dentition nbsp Patagonykus 1996 Portezuelo Formation Late Cretaceous Turonian to Coniacian nbsp Argentina Its discovered allowed researchers to connect Alvarezsaurus and parvicursorines 45 nbsp Patagopelta 2022 Allen Formation Late Cretaceous Campanian to Maastrichtian nbsp Argentina The first nodosaurid recovered from South America nbsp Patagosaurus 1979 Canadon Asfalto Formation Early Jurassic Toarcian nbsp Argentina Known from remains of adults and juveniles depicting how various features developed in sauropods as they aged nbsp Patagotitan 2017 Cerro Barcino Formation Early Cretaceous Albian nbsp Argentina One of the largest dinosaurs known from reasonably complete remains nbsp Pellegrinisaurus 1996 Allen Formation Late Cretaceous Campanian to Maastrichtian nbsp Argentina May have lived inland unlike other contemporaneous titanosaurs 46 nbsp Perijasaurus 2022 La Quinta Formation Early Jurassic to Middle Jurassic Toarcian to Aalenian nbsp Colombia Only known from a single vertebraPetrobrasaurus 2011 Plottier Formation Late Cretaceous Coniacian to Santonian nbsp Argentina Shares somes features with lognkosaurs but its membership within this clade cannot be confirmed nbsp Piatnitzkysaurus 1979 Canadon Asfalto Formation Early Jurassic Toarcian nbsp Argentina One of the few early theropods with a well preserved braincase nbsp Pilmatueia 2019 Mulichinco Formation Early Cretaceous Valanginian nbsp Argentina Had elongated spines on its cervical vertebrae although they weren t as those of Amargasaurus and Bajadasaurus 47 Pitekunsaurus 2008 Anacleto Formation Late Cretaceous Campanian nbsp Argentina Known from several bones from different parts of the body including a braincasePowellvenator 2017 Los Colorados Formation Late Triassic Norian nbsp Argentina Some of this genus remains were originally associated with those of a pseudosuchian 48 Puertasaurus 2005 Cerro Fortaleza Formation Late Cretaceous Campanian to Maastrichtian nbsp Argentina Large but only known from very few remains nbsp Punatitan 2020 Cienaga del Rio Huaco Formation Late Cretaceous Campanian to Maastrichtian nbsp Argentina Contemporary with Bravasaurus but was most likely distantly related 49 Pycnonemosaurus 2002 Unnamed formation Late Cretaceous Maastrichtian nbsp Brazil Potentially the largest known abelisaurid 50 nbsp Quetecsaurus 2014 Lisandro Formation Late Cretaceous Turonian nbsp Argentina Its humerus was uniquely shaped nbsp Quilmesaurus 2001 Allen Formation Late Cretaceous Campanian to Maastrichtian nbsp Argentina Had proportionally robust legs despite its small size nbsp Rayososaurus 1996 Candeleros Formation Late Cretaceous Cenomanian nbsp Argentina Very similar to Rebbachisaurus despite only being known from scant remains nbsp Rinconsaurus 2003 Bajo de la Carpa Formation Late Cretaceous Santonian nbsp Argentina Unusually its caudal vertebrae had a repeating pattern of procoely amphicoely opisthocoely and biconvex states nbsp Riojasaurus 1969 Los Colorados Formation Late Triassic Norian nbsp Argentina Although commonly depicted as quadrupedal the structure of its shoulder girdle suggests it may potentially be bipedal nbsp Rocasaurus 2000 Allen Formation Late Cretaceous Campanian to Maastrichtian nbsp Argentina Small for a sauropod yet was very robust nbsp Saltasaurus 1980 Lecho Formation Late Cretaceous Maastrichtian nbsp Argentina Possessed osteoderms in the form of large round nodules connected by a mass of smaller plates nbsp Sanjuansaurus 2010 Ischigualasto Formation Late Triassic Carnian nbsp Argentina Coexisted with Herrerasaurus but most likely represents a separate taxon nbsp Santanaraptor 1999 Romualdo Formation Early Cretaceous Aptian to Albian nbsp Brazil Preserves soft tissues including the remains of skin muscle and possibly blood vessels 51 52 nbsp Sarmientosaurus 2016 Bajo Barreal Formation Late Cretaceous Cenomanian to Turonian nbsp Argentina Analysis of its inner ear suggests it held its head downwards possibly indicating a preference for low growing plants nbsp Saturnalia 1999 Santa Maria Formation Late Triassic Carnian nbsp Brazil Known from at least three partial skeletons nbsp Secernosaurus 1979 Lago Colhue Huapi Formation Late Cretaceous Campanian to Maastrichtian nbsp Argentina Would have lived in an arid gypsum desert 53 Sektensaurus 2019 Lago Colhue Huapi Formation Late Cretaceous Campanian nbsp Argentina The first non hadrosaurid ornithopod recovered from central PatagoniaSkorpiovenator 2009 Huincul Formation Late Cretaceous Cenomanian to Turonian nbsp Argentina Had an unusually short and deep skull nbsp Spectrovenator 2020 Quirico Formation Early Cretaceous Barremian to Aptian nbsp Brazil Its holotype was found underneath a sauropod skeleton nbsp Staurikosaurus 1970 Santa Maria Formation Late Triassic Carnian to Norian nbsp Brazil May have been a rare component of its environment as only two specimens are known nbsp Stegouros 2021 Dorotea Formation Late Cretaceous Campanian to Maastrichtian nbsp Chile Possessed a macuahuitl at the end of its tail made of a connected frond of pointed osteoderms nbsp Tachiraptor 2014 La Quinta Formation Early Jurassic Hettangian nbsp Venezuela Closely related to ceratosaurs and tetanurans 54 nbsp Talenkauen 2004 Cerro Fortaleza Formation Late Cretaceous Campanian to Maastrichtian nbsp Argentina May have practiced parental care as an adult and a hatchling have been found together nbsp Tapuiasaurus 2011 Quirico Formation Early Cretaceous Aptian nbsp Brazil One of the few titanosaurs of which a complete skull is known nbsp Taurovenator 2016 Huincul Formation Late Cretaceous Cenomanian to Turonian nbsp Argentina Only known from a single postorbital May be synonymous with Mapusaurus 55 nbsp Tehuelchesaurus 1999 Canadon Calcareo Formation Late Jurassic Oxfordian to Tithonian nbsp Argentina Preserves impressions of scaly skin nbsp Thanos 2020 Sao Jose do Rio Preto Formation Late Cretaceous Santonian nbsp Brazil Only known from a single vertebra The generic name honors the Marvel Comics villain Thanos nbsp Tralkasaurus 2020 Huincul Formation Late Cretaceous Cenomanian to Turonian nbsp Argentina Exhibits a conflict blend of characteristics from basal and derived abelisauroidsTratayenia 2018 Bajo de la Carpa Formation Late Cretaceous Santonian nbsp Argentina One of the youngest known megaraptorans 56 nbsp Traukutitan 2011 Bajo de la Carpa Formation Late Cretaceous Santonian nbsp Argentina Retained basal features in its caudal vertebrae despite its late ageTrigonosaurus 2005 Serra da Galga Formation Late Cretaceous Maastrichtian nbsp Brazil Potentially synonymous with Baurutitan 13 nbsp Triunfosaurus 2017 Rio Piranhas Formation Early Cretaceous Berriasian to Valanginian nbsp Brazil Originally described as a titanosaur 57 but similarities have been noted with basal somphospondylians 58 Tyrannotitan 2005 Cerro Barcino Formation Early Cretaceous Aptian nbsp Argentina Unlike other carcharodontosaurids its sacral and caudal vertebrae were not pneumatic nbsp Uberabatitan 2008 Serra da Galga Formation Late Cretaceous Maastrichtian nbsp Brazil Several individuals are known some of which are very large nbsp Unaysaurus 2004 Caturrita Formation Late Triassic Carnian to Norian nbsp Brazil Described as the first plateosaurid grade sauropodomorph from Brazil nbsp Unenlagia 1997 Portezuelo Formation Late Cretaceous Coniacian nbsp Argentina Could potentially be adapted for flapping due to the structure of its shoulder girdle 59 nbsp Unquillosaurus 1979 Los Blanquitos Formation Late Cretaceous Campanian nbsp Argentina Has been suggested to be a dromaeosaurid 60 or a carcharodontosaurid 61 Velocisaurus 1991 Bajo de la Carpa Formation Late Cretaceous Santonian nbsp Argentina Unusually its third metatarsal is the thickest which may be an adaptation to running nbsp Vespersaurus 2019 Rio Parana Formation Late Cretaceous nbsp Brazil Possessed raised claws on its second and fourth toes making it functionally monodactyl a possible adaptation to its desert habitat nbsp Viavenator 2016 Bajo de la Carpa Formation Late Cretaceous Santonian nbsp Argentina May have relied on quick movements of its head and gaze stabilization when hunting nbsp Volkheimeria 1979 Canadon Asfalto Formation Early Jurassic Toarcian nbsp Argentina Coexisted with at least three other eusauropodsWillinakaqe 2010 Allen Formation Late Cretaceous Campanian to Maastrichtian nbsp Argentina As originally described it represented a chimera of two different taxa one of which was later named Bonapartesaurus 62 Xenotarsosaurus 1986 Bajo Barreal Formation Late Cretaceous Cenomanian to Turonian nbsp Argentina Had an unusually shaped astragalus and calcaneum nbsp Yamanasaurus 2019 Rio Playas Formation Late Cretaceous Maastrichtian nbsp Ecuador The northernmost saltasaurine known to date 49 nbsp Ypupiara 2021 Serra da Galga Formation Late Cretaceous Maastrichtian nbsp Brazil May have been a piscivore due to the shape of its teeth 63 nbsp Zapalasaurus 2006 La Amarga Formation Early Cretaceous Hauterivian to Aptian nbsp Argentina Known from an incomplete skeleton including several caudal vertebrae nbsp Zupaysaurus 2003 Los Colorados Formation Late Triassic Norian nbsp Argentina Although commonly depicted with head crests they may in fact be misplaced lacrimal bones 64 nbsp Invalid and potentially valid genera Edit nbsp Angaturama nbsp Oxalaia nbsp Ubirajara Angaturama limai Only known from the tip of the snout It may belong to the contemporary Irritator but it could also represent its own taxon Bayosaurus pubica An abelisaurid known from partial postcranial remains Oxalaia quilombensis Potentially a junior synonym of Spinosaurus Ubirajara jubatus Known from a single specimen that preserves impressions of feathers including display feathers on its sides Its description was retracted before it could be published due to allegations that the specimen was illegally exported from Brazil Timeline EditThis is a timeline of selected dinosaurs from the list above Time is measured in Ma megaannum along the x axis Carnivores are shown in red herbivores in green and omnivores in blue See also Edit nbsp Dinosaurs portalList of birds of South AmericaReferences Edit Makovicky P J Apesteguia S N Gianechini F A 2012 A New Coelurosaurian Theropod from the La Buitrera Fossil Locality of Rio Negro Argentina Fieldiana Life and Earth Sciences 5 90 98 doi 10 3158 2158 5520 5 1 90 S2CID 129758444 Bellardini F Cerda I A 2017 Bone histology sheds light on the nature of the dermal armor of the enigmatic sauropod dinosaur Agustinia ligabuei Bonaparte 1999 The Science of Nature 104 1 1 Bibcode 2017SciNa 104 1B doi 10 1007 s00114 016 1423 7 PMID 27942797 S2CID 21654124 Paul G S 1994 Dinosaur art amp 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