This is a list of dinosaurs whose remains have been recovered from South America.
| Name | Year | Formation | Location | Notes | Images |
|---|---|---|---|---|---|
| Abelisaurus | 1985 | Anacleto Formation (Late Cretaceous, Campanian) | Only known from a single partial skull | ||
| Achillesaurus | 2007 | Bajo de la Carpa Formation (Late Cretaceous, Santonian) | Potentially a junior synonym of Alvarezsaurus[1] | ||
| Adamantisaurus | 2006 | Adamantina Formation (Late Cretaceous, Campanian) | 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) | May have had a keratinous beak based on the shape of its jaw bones | ||
| Aeolosaurus | 1987 | Angostura Colorada Formation, Lago Colhué Huapí Formation (Late Cretaceous, Campanian to Maastrichtian) | Known from the remains of several individuals | ||
| Aerosteon | 2009 | Plottier Formation (Late Cretaceous, Santonian) | 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) | 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) | The oldest alvarezsaurid known from South America | ||
| Alvarezsaurus | 1991 | Bajo de la Carpa Formation (Late Cretaceous, Santonian) | One of the largest known alvarezsaurids | ||
| Amargasaurus | 1991 | La Amarga Formation (Early Cretaceous, Barremian to Aptian) | Possessed two parallel rows of backward-pointing spines on its neck | ||
| Amargatitanis | 2007 | La Amarga Formation (Early Cretaceous, Barremian) | Originally described as a titanosaur[3] although it has since been reinterpreted as a dicraeosaurid[4] | ||
| Amazonsaurus | 2003 | Itapecuru Formation (Early Cretaceous, Aptian to Albian) | Had tall neural spines on its caudal vertebrae | ||
| Amygdalodon | 1947 | Cerro Carnerero Formation (Early Jurassic, Toarcian) | Its teeth were shaped like almonds | ||
| Anabisetia | 2002 | Lisandro Formation (Late Cretaceous, Cenomanian to Turonian) | Four specimens are known but none of them preserve a skull | ||
| Andesaurus | 1991 | Candeleros Formation (Late Cretaceous, Cenomanian) | Several osteological features indicate a basal position within the Titanosauria | ||
| Aniksosaurus | 2006 | Bajo Barreal Formation (Late Cretaceous, Cenomanian to Turonian) | Bone bed remains suggest a gregarious lifestyle[5] | ||
| Antarctosaurus | 1929 | Anacleto Formation (Late Cretaceous, Campanian) | 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) | Potentially synonymous with Gualicho | ||
| Arackar | 2021 | Hornitos Formation (Late Cretaceous, Campanian to Maastrichtian) | The most complete sauropod known from South America | ||
| Aratasaurus | 2020 | Romualdo Formation (Early Cretaceous, Albian) | All three of its toes were symmetric | ||
| Argentinosaurus | 1993 | Huincul Formation (Late Cretaceous, Cenomanian to Turonian) | May be the largest known dinosaur | ||
| Argyrosaurus | 1893 | Lago Colhué Huapí Formation (Late Cretaceous, Campanian to Maastrichtian) | Several remains were historically assigned to this genus, but only the holotype can be confidently assigned to it[6] | ||
| Arrudatitan | 2021 | Adamantina Formation (Late Cretaceous, Campanian to Maastrichtian) | Its tail probably curved strongly downward, with the tip held very low to the ground[7] | ||
| Asfaltovenator | 2019 | Cañadón Asfalto Formation (Early Jurassic, Toarcian) | Combines traits of both megalosauroids and allosauroids. Its describers suggest paraphyly of the former group[8] | ||
| Atacamatitan | 2011 | Tolar Formation (Late Cretaceous) | Only known from a single, fragmentary skeleton | ||
| Aucasaurus | 2002 | Anacleto Formation (Late Cretaceous, Santonian to Campanian) | Known from almost the entire skeleton, including most of the skull | ||
| Austrocheirus | 2010 | Cerro Fortaleza Formation (Late Cretaceous, Campanian) | Unusually for an abelisauroid, its arms were relatively long | ||
| Austroposeidon | 2016 | Presidente Prudente Formation (Late Cretaceous, Campanian to Maastrichtian) | The largest dinosaur known from Brazil | ||
| Austroraptor | 2008 | Allen Formation (Late Cretaceous, Campanian to Maastrichtian) | Possessed an elongated snout paralleling that of spinosaurids | ||
| Baalsaurus | 2018 | Portezuelo Formation (Late Cretaceous, Turonian to Coniacian) | Had a squared-off dentary with its teeth crowded to the front | ||
| Bagualia | 2020 | Cañadón Asfalto Formation (Early Jurassic, Toarcian) | Represents an early radiation of eusauropods that displaced earlier basal sauropodomorphs after a global warming event[9] | ||
| Bagualosaurus | 2018 | Santa Maria Formation (Late Triassic, Carnian) | Its hindlimbs were very robust | ||
| Bajadasaurus | 2019 | Bajada Colorada Formation (Early Cretaceous, Berriasian to Valanginian) | Possessed elongated, forward-pointing spines erupting in pairs from the neck | ||
| Barrosasaurus | 2009 | Anacleto Formation (Late Cretaceous, Campanian) | 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) | Described from an associated series of nineteen vertebrae | ||
| Berthasaura | 2021 | Goio-Erê Formation (Early Cretaceous, Aptian to Albian) | Possessed a short, toothless beak, indicating a herbivorous or omnivorous diet | ||
| Bicentenaria | 2012 | Candeleros Formation (Late Cretaceous, Cenomanian) | Several individuals were preserved together, suggesting a gregarious lifestyle[10] | ||
| Bonapartenykus | 2012 | Allen Formation (Late Cretaceous, Campanian to Maastrichtian) | Its holotype was preserved with two eggs that may have been within its oviducts when it died[11] | ||
| Bonapartesaurus | 2017 | Allen Formation (Late Cretaceous, Campanian to Maastrichtian) | Represents a saurolophine dispersal event from North America[12] | ||
| Bonatitan | 2004 | Allen Formation (Late Cretaceous, Campanian to Maastrichtian) | Analysis of its inner ear suggests a decreased range of head movements compared to other sauropods[13] | ||
| Bonitasaura | 2004 | Bajo de la Carpa Formation (Late Cretaceous, Santonian) | The proportions of its body were similar to those of diplodocoids, likely through convergent evolution | ||
| Brachytrachelopan | 2005 | Cañadón Calcáreo Formation (Late Jurassic, Oxfordian to Tithonian) | Possessed the shortest neck of any known sauropod | ||
| Brasilotitan | 2013 | Adamantina Formation (Late Cretaceous, Maastrichtian) | Had an L-shaped dentary similar to that of Antarctosaurus and Bonitasaura | ||
| Bravasaurus | 2020 | Ciénaga del Río Huaco Formation (Late Cretaceous, Campanian to Maastrichtian) | Discovered close to a large concentration of titanosaur eggs | ||
| Buitreraptor | 2005 | Candeleros Formation (Late Cretaceous, Cenomanian to Turonian) | May have been a pursuit predator due to its long legs[14] | ||
| Buriolestes | 2016 | Santa Maria Formation (Late Triassic, Carnian) | Completely carnivorous due to its serrated teeth | ||
| Campylodoniscus | 1961 | Bajo Barreal Formation? (Late Cretaceous, Cenomanian) | Only known from a single maxilla with seven teeth | ||
| Carnotaurus | 1985 | La Colonia Formation (Late Cretaceous, Maastrichtian) | Possessed a pair of short horns on the top of its skull | ||
| Cathartesaura | 2005 | Huincul Formation (Late Cretaceous, Cenomanian) | Had a well-muscled neck although it could not move strongly up or down | ||
| Chilesaurus | 2015 | Toqui Formation (Late Jurassic, Tithonian) | Combines traits of theropods, sauropodomorphs, and ornithischians, with far-reaching implications for the evolution of the Dinosauria | ||
| Choconsaurus | 2017 | Huincul Formation (Late Cretaceous, Cenomanian) | One of the more completely known basal titanosaurs | ||
| Chromogisaurus | 2010 | Ischigualasto Formation (Late Triassic, Carnian) | Its discovery suggests that early dinosaurs were more diverse than previously thought | ||
| Chubutisaurus | 1975 | Cerro Barcino Formation (Early Cretaceous, Albian) | Unusually, its forelimbs were shorter than its hindlimbs[15] | ||
| Clasmodosaurus | 1898 | Bajo Barreal Formation (Late Cretaceous, Cenomanian to Turonian) | Similarly to Bonitasaura, its teeth were polygonal in cross-section | ||
| Coloradisaurus | 1990 | Los Colorados Formation (Late Triassic, Norian) | Originally called Coloradia, although that genus name is occupied by a moth | ||
| Comahuesaurus | 2012 | Lohan Cura Formation (Early Cretaceous, Aptian to Albian) | Its holotype was originally assigned to Limaysaurus, but it was named as a separate genus due to possessing a certain feature in its vertebrae | ||
| Condorraptor | 2005 | Cañadón Asfalto Formation (Early Jurassic, Toarcian) | Closely related to the coeval Piatnitzkysaurus but could be distinguished by several osteological features | ||
| Dreadnoughtus | 2014 | Cerro Fortaleza Formation (Late Cretaceous, Campanian to Maastrichtian) | The heaviest land animal whose mass can be calculated with reasonable certainty | ||
| Drusilasaura | 2011 | Bajo Barreal Formation (Late Cretaceous, Cenomanian to Turonian) | Potentially the oldest known member of the lognkosaurian lineage[16] | ||
| Ekrixinatosaurus | 2004 | Candeleros Formation (Late Cretaceous, Cenomanian) | Had robust bones, indicating a massive build and a greater resistance to injuries[17] | ||
| Elaltitan | 2012 | Bajo Barreal Formation (Late Cretaceous, Cenomanian to Turonian) | Extremely large due to its long femur | ||
| Eoabelisaurus | 2012 | Cañadón Asfalto Formation (Early Jurassic, Toarcian) | 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 | Well-adapted for cursoriality despite its early age[18] | ||
| Eoraptor | 1993 | Ischigualasto Formation (Late Triassic, Carnian) | Possessed different types of teeth, suggesting it was omnivorous | ||
| Epachthosaurus | 1990 | Bajo Barreal Formation (Late Cretaceous, Cenomanian to Turonian) | 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) | Known from the Riograndia Assemblage Zone, an area which is unusually dominated by cynodonts | ||
| Futalognkosaurus | 2007 | Portezuelo Formation (Late Cretaceous, Coniacian) | Possessed meter-deep cervical vertebrae with distinctive shark fin-shaped neural spines | ||
| Gasparinisaura | 1996 | Anacleto Formation (Late Cretaceous, Campanian) | Known from specimens of both adults and juveniles | ||
| Genyodectes | 1901 | Cerro Barcino Formation (Early Cretaceous, Aptian to Albian) | Had extremely large and protruding teeth | ||
| Giganotosaurus | 1995 | Candeleros Formation (Late Cretaceous, Cenomanian) | One of the largest known terrestrial carnivorous dinosaurs | ||
| Gondwanatitan | 1999 | Adamantina Formation (Late Cretaceous, Maastrichtian) | For a titanosaur, it had relatively gracile limb bones | ||
| Guaibasaurus | 1999 | Caturrita Formation (Late Triassic, Norian) | Combines features of both early theropods and sauropodomorphs | ||
| Gualicho | 2016 | Huincul Formation (Late Cretaceous, Cenomanian to Turonian) | Originally described as having highly reduced arms with only two fingers, convergent with tyrannosaurids, although one study suggests a third finger was present[19] | ||
| Guemesia | 2022 | Los Blanquitos Formation (Late Cretaceous, Campanian) | Known from a nearly complete braincase, one of the smallest known abelisaurids[20] | ||
| Huallasaurus | 2022 | Los Alamitos Formation (Late Cretaceous, Late Campanian to Maastrichtian) | Originally described as a species of Kritosaurus or a synonym of Secernosaurus | ||
| Huinculsaurus | 2020 | Huincul Formation (Late Cretaceous, Cenomanian to Turonian) | The youngest known elaphrosaurine | ||
| Ilokelesia | 1998 | Huincul Formation (Late Cretaceous, Cenomanian) | Its skull retains some basal abelisauroid traits | ||
| Ingentia | 2018 | Quebrada del Barro Formation (Late Triassic, Rhaetian) | The earliest known very large sauropodomorph[21] | ||
| Irritator | 1996 | Romualdo Formation (Early Cretaceous, Albian) | May have been the apex predator of its habitat, hunting both aquatic and terrestrial prey[22] | ||
| Isaberrysaura | 2017 | Los Molles Formation (Middle Jurassic, Bajocian) | Potentially a basal stegosaur[23] | ||
| Isasicursor | 2019 | Chorrillo Formation (Late Cretaceous, Campanian to Maastrichtian) | Four individuals of different ages were found together, suggesting it lived in herds[24] | ||
| Itapeuasaurus | 2019 | Alcântara Formation (Late Cretaceous, Cenomanian) | Only known from six vertebrae | ||
| Kaijutitan | 2019 | Sierra Barrosa Formation (Late Cretaceous, Coniacian) | One of the latest-surviving basal titanosaurs | ||
| Katepensaurus | 2013 | Bajo Barreal Formation (Late Cretaceous, Cenomanian to Turonian) | Distinguished by a certain opening in its dorsal vertebrae | ||
| Kelumapusaura | 2022 | Allen Formation (Late Cretaceous, mid-Campanian to Maastrichtian) | Known from a bonebed of various individuals | ||
| Kurupi | 2021 | Marília Formation (Late Cretaceous, Maastrichtian) | Would have had a stiff tail as indicated by the anatomy of its caudal vertebrae | ||
| Lajasvenator | 2020 | Mulichinco Formation (Early Cretaceous, Valanginian) | One of the smallest known allosauroids | ||
| Lapampasaurus | 2012 | Allen Formation (Late Cretaceous, Campanian to Maastrichtian) | Known from a partial skeleton lacking the skull | ||
| Laplatasaurus | 1929 | Allen Formation (Late Cretaceous, Campanian) | Osteoderms have been assigned to this taxon although this referral is uncertain | ||
| Laquintasaura | 2014 | La Quinta Formation (Early Jurassic, Hettangian) | One study recovered it as a basal thyreophoran[25] despite the fact no osteoderms have been found | ||
| Lavocatisaurus | 2018 | Rayoso Formation (Early Cretaceous, Aptian to Albian) | May have possessed a keratinous beak[26] | ||
| Leinkupal | 2014 | Bajada Colorada Formation (Early Cretaceous, Berriasian to Valanginian) | The youngest known diplodocid | ||
| Leonerasaurus | 2011 | Las Leoneras Formation (Early Jurassic?) | Has an unusual combination of basal and derived traits | ||
| Lessemsaurus | 1999 | Los Colorados Formation (Late Triassic, Norian) | Grew very large despite lacking the anatomical traits usually seen as supporting gigantism[21] | ||
| Leyesaurus | 2011 | Quebrada del Barro Formation (Early Jurassic) | Its teeth were moderately heterodont | ||
| Ligabueino | 1996 | La Amarga Formation (Early Cretaceous, Barremian to Aptian) | Known from a single, very small, juvenile skeleton | ||
| Ligabuesaurus | 2006 | Lohan Cura Formation (Early Cretaceous, Aptian to Albian) | Its forelimbs were extremely long, with similar proportions to those of brachiosaurids[27] | ||
| Limaysaurus | 2004 | Candeleros Formation (Late Cretaceous, Cenomanian) | Possessed elongated neural spines on its dorsal vertebrae | ||
| Llukalkan | 2021 | Bajo de la Carpa Formation (Late Cretaceous, Santonian) | May have had a keen sense of hearing due to the shape of its ear[28] | ||
| Loncosaurus | 1899 | Cardiel Formation?/Metasiete Formation? (Late Cretaceous, Campanian to Maastrichtian) | Poorly known | ||
| Loricosaurus | 1929 | Allen Formation (Late Cretaceous, Maastrichtian) | Potentially synonymous with Neuquensaurus or Saltasaurus | ||
| Lucianovenator | 2017 | Quebrada del Barro Formation (Late Triassic, Norian to Rhaetian) | Only known from a few bones, but it is nonetheless more common than other Rhaetian theropods | ||
| Macrocollum | 2018 | Candelária Formation (Late Triassic, Norian) | One of the oldest sauropodomorphs with an extremely elongated neck | ||
| Macrogryphosaurus | 2007 | Sierra Barrosa Formation (Late Cretaceous, Coniacian) | Preserves a series of mineralized plates along the side of the torso | ||
| Mahuidacursor | 2019 | Bajo de la Carpa Formation (Late Cretaceous, Santonian) | Its holotype was sexually mature but not fully grown | ||
| Maip | 2022 | Chorrillo Formation (Late Cretaceous, Maastrichtian) | Possibly the largest and youngest megaraptorid | ||
| Malarguesaurus | 2008 | Los Bastos Formation (Late Cretaceous, Coniacian) | Large and robustly built | ||
| Manidens | 2011 | Cañadón Asfalto Formation (Early Jurassic, Toarcian) | May have been arboreal due to the structure of its feet, with toes adapted for grasping[29] | ||
| Mapusaurus | 2006 | Huincul Formation (Late Cretaceous, Cenomanian to Turonian) | Seven specimens of different growth stages are known, possibly suggesting that lived and/or hunted in packs | ||
| Maxakalisaurus | 2006 | Adamantina Formation (Late Cretaceous, Campanian) | Unusually for a sauropod, it had ridged teeth | ||
| Megaraptor | 1998 | Portezuelo Formation (Late Cretaceous, Turonian to Coniacian) | Possessed a large, strongly curved claw on its first finger | ||
| Mendozasaurus | 2003 | Sierra Barrosa Formation (Late Cretaceous, Coniacian) | Had spherical osteoderms that were probably located in rows along the flanks[30] | ||
| Menucocelsior | 2022 | Allen Formation (Late Cretaceous, Maastrichtian) | Coexisted with multiple other titanosaurs that may have niche-partitioned[31] | ||
| Meraxes | 2022 | Huincul Formation (Late Cretaceous, Cenomanian) | A large carcharodontosaurid with the most complete carcharodontosaurid skeleton known from the Southern Hemisphere | ||
| Microcoelus | 1893 | Bajo de la Carpa Formation (Late Cretaceous, Santonian to Campanian) | May be a synonym of Neuquensaurus | ||
| Mirischia | 2004 | Romualdo Formation (Early Cretaceous, Albian) | Its holotype preserves an intestine | ||
| Murusraptor | 2016 | Sierra Barrosa Formation (Late Cretaceous, Coniacian) | Had a brain morphology similar to that of tyrannosaurids but its sensory capabilities were closer to the level of allosauroids[32] | ||
| Mussaurus | 1979 | Laguna Colorada Formation (Early Jurassic, Sinemurian) | Multiple specimens from different growth stages are known. Juveniles may have been quadrupedal and shifted to bipedality as adults[33] | ||
| Muyelensaurus | 2007 | Plottier Formation (Late Cretaceous, Coniacian to Santonian) | Relatively gracile for a titanosaur | ||
| Narambuenatitan | 2011 | Anacleto Formation (Late Cretaceous, Campanian) | Its neural spines are very similar to those of Epachthosaurus | ||
| Neuquenraptor | 2005 | Portezuelo Formation (Late Cretaceous, Coniacian) | Potentially synonymous with Unenlagia[34] | ||
| Neuquensaurus | 1992 | Anacleto Formation (Late Cretaceous, Campanian) | One of the smallest known titanosaurs | ||
| Nhandumirim | 2019 | Santa Maria Formation (Late Triassic, Carnian) | Originally described as a theropod[35] but has since been reinterpreted as a sauropodomorph[36] | ||
| Niebla | 2020 | Allen Formation (Late Cretaceous, Campanian to Maastrichtian) | Had a uniquely-built scapulocoracoid that is only found in this genus and Carnotaurus | ||
| Ninjatitan | 2021 | Bajada Colorada Formation (Early Cretaceous, Berriasian to Valanginian) | The oldest known titanosaur | ||
| Noasaurus | 1980 | Lecho Formation (Late Cretaceous, Maastrichtian) | Originally mistakenly believed to have possessed a dromaeosaurid-like sickle claw | ||
| Nopcsaspondylus | 2007 | Candeleros Formation (Late Cretaceous, Cenomanian) | Named from a single, lost vertebra | ||
| Notoceratops | 1918 | Laguna Palacios Formation?/Pehuenche Formation? (Late Cretaceous, Campanian to Maastrichtian) | If a ceratopsian it would be the only South American member of the group | ||
| Notocolossus | 2016 | Plottier Formation (Late Cretaceous, Coniacian to Santonian) | Unusually for a sauropod, its unguals were truncated | ||
| Notohypsilophodon | 1998 | Bajo Barreal Formation (Late Cretaceous, Cenomanian to Turonian) | Only known from a skull-less, juvenile skeleton | ||
| Nullotitan | 2019 | Chorrillo Formation (Late Cretaceous, Campanian to Maastrichtian) | Would have niche-partitioned with smaller ornithopods | ||
| Orkoraptor | 2008 | Cerro Fortaleza Formation (Late Cretaceous, Campanian) | Had highly specialized dentition similar to that of maniraptorans | ||
| Overoraptor | 2020 | Huincul Formation (Late Cretaceous, Cenomanian) | Shows adaptations for both flight and cursoriality | ||
| Overosaurus | 2013 | Bajo de la Carpa Formation (Late Cretaceous, Santonian) | One of the smallest known aeolosaurins | ||
| Padillasaurus | 2015 | Paja Formation (Early Cretaceous, Barremian) | Originally described as a brachiosaurid[37] although it could also be a somphospondylian[38] | ||
| Pampadromaeus | 2011 | Santa Maria Formation (Late Triassic, Carnian) | Some features of its jaws are similar to those of theropods | ||
| Pamparaptor | 2011 | Portezuelo Formation (Late Cretaceous, Turonian to Coniacian) | Had a troodontid-like metatarsal | ||
| Panamericansaurus | 2010 | Allen Formation (Late Cretaceous, Campanian to Maastrichtian) | Known from a single partial skeleton | ||
| Pandoravenator | 2017 | Cañadón Calcáreo Formation (Late Jurassic, Oxfordian to Tithonian) | Inconsistent in phylogenetic placement | ||
| Panphagia | 2009 | Ischigualasto Formation (Late Triassic, Carnian) | Was omnivorous as indicated by its heterodont dentition | ||
| Patagonykus | 1996 | Portezuelo Formation (Late Cretaceous, Turonian to Coniacian) | Its discovered allowed researchers to connect Alvarezsaurus and parvicursorines[39] | ||
| Patagosaurus | 1979 | Cañadón Asfalto Formation (Early Jurassic, Toarcian) | 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) | One of the largest dinosaurs known from reasonably complete remains | ||
| Pellegrinisaurus | 1996 | Allen Formation (Late Cretaceous, Campanian to Maastrichtian) | May have lived inland unlike other contemporaneous titanosaurs[40] | ||
| Petrobrasaurus | 2011 | Plottier Formation (Late Cretaceous, Coniacian to Santonian) | Shares somes features with lognkosaurs, but its membership within this clade cannot be confirmed | ||
| Piatnitzkysaurus | 1979 | Cañadón Asfalto Formation (Early Jurassic, Toarcian) | One of the few early theropods with a well-preserved braincase | ||
| Pilmatueia | 2018 | Mulichinco Formation (Early Cretaceous, Valanginian) | Closely related to Amargasaurus[41] | ||
| Pitekunsaurus | 2008 | Anacleto Formation (Late Cretaceous, Campanian) | Known from several bones from different parts of the body, including a braincase | ||
| Powellvenator | 2017 | Los Colorados Formation (Late Triassic, Norian) | Some of this genus' remains were originally associated with those of a pseudosuchian[42] | ||
| Puertasaurus | 2005 | Cerro Fortaleza Formation (Late Cretaceous, Campanian to Maastrichtian) | Large but only known from very few remains | ||
| Punatitan | 2020 | Ciénaga del Río Huaco Formation (Late Cretaceous, Campanian to Maastrichtian) | Contemporary with Bravasaurus but was most likely distantly related[43] | ||
| Pycnonemosaurus | 2002 | Unnamed formation (Late Cretaceous, Maastrichtian) | Potentially the largest known abelisaurid[44] | ||
| Quetecsaurus | 2014 | Lisandro Formation (Late Cretaceous, Turonian) | Its humerus was uniquely-shaped | ||
| Quilmesaurus | 2001 | Allen Formation (Late Cretaceous, Campanian to Maastrichtian) | Had proportionally robust legs despite its small size | ||
| Rayososaurus | 1996 | Candeleros Formation (Late Cretaceous, Cenomanian) | Very similar to Rebbachisaurus despite only being known from scant remains | ||
| Rinconsaurus | 2003 | Bajo de la Carpa Formation (Late Cretaceous, Santonian) | Unusually, its caudal vertebrae had a repeating pattern of procoely, amphicoely, opisthocoely, and biconvex states | ||
| Riojasaurus | 1969 | Los Colorados Formation (Late Triassic, Norian) | Although commonly depicted as quadrupedal, the structure of its shoulder girdle suggests it was bipedal | ||
| Rocasaurus | 2000 | Allen Formation (Late Cretaceous, Campanian to Maastrichtian) | Small for a sauropod yet was very robust | ||
| Saltasaurus | 1980 | Lecho Formation (Late Cretaceous, Maastrichtian) | Possessed osteoderms in the form of large round nodules connected by a mass of smaller plates | ||
| Santanaraptor | 1999 | Romualdo Formation (Early Cretaceous, Aptian to Albian) | Preserves soft tissues including the remains of skin, muscle, and possibly blood vessels[45][46] | ||
| Sarmientosaurus | 2016 | Bajo Barreal Formation (Late Cretaceous, Cenomanian to Turonian) | 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) | Known from three partial skeletons | ||
| Secernosaurus | 1979 | Lago Colhué Huapí Formation, Los Alamitos Formation (Late Cretaceous, Campanian to Maastrichtian) | Some remains were originally misidentified as belonging to a southern species of Kritosaurus | ||
| Sektensaurus | 2019 | Lago Colhué Huapí Formation (Late Cretaceous, Campanian to Maastrichtian) | The first non-hadrosaurid ornithopod recovered from central Patagonia | ||
| Skorpiovenator | 2008 | Huincul Formation (Late Cretaceous, Cenomanian to Turonian) | Had an unusually short and deep skull | ||
| Spectrovenator | 2020 | Quiricó Formation (Early Cretaceous, Barremian to Aptian) | Its holotype was found underneath a sauropod skeleton | ||
| Staurikosaurus | 1970 | Santa Maria Formation (Late Triassic, Carnian to Norian) | May have been a rare component of its environment, with only two specimens known | ||
| Stegouros | 2021 | Dorotea Formation (Late Cretaceous, Campanian to Maastrichtian) | 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) | Closely related to ceratosaurs and tetanurans[47] | ||
| Talenkauen | 2004 | Cerro Fortaleza Formation (Late Cretaceous, Campanian to Maastrichtian) | May have practiced parental care as an adult and a hatchling have been found together | ||
| Tapuiasaurus | 2011 | Quiricó Formation (Early Cretaceous, Aptian) | One of the few titanosaurs of which a complete skull is known | ||
| Tehuelchesaurus | 1999 | Cañadón Calcáreo Formation (Late Jurassic, Oxfordian to Tithonian) | Preserves impressions of scaly skin | ||
| Thanos | 2020 | São José do Rio Preto Formation (Late Cretaceous, Santonian) | Only known from a single vertebra. The generic name honors the Marvel Comics villain Thanos | ||
| Tralkasaurus | 2020 | Huincul Formation (Late Cretaceous, Cenomanian to Turonian) | Exhibits a conflict blend of characteristics from basal and derived abelisauroids | ||
| Tratayenia | 2018 | Bajo de la Carpa Formation (Late Cretaceous, Santonian) | One of the youngest known megaraptorans[48] | ||
| Traukutitan | 2011 | Bajo de la Carpa Formation (Late Cretaceous, Santonian) | Retained basal features in its caudal vertebrae despite its late age | ||
| Trigonosaurus | 2005 | Serra da Galga Formation (Late Cretaceous, Maastrichtian) | Before it was formally described, it had been informally referred to as the "Peirópolis titanosaur" | ||
| Triunfosaurus | 2017 | Rio Piranhas Formation (Early Cretaceous, Berriasian to Valanginian) | Originally described as a titanosaur[49] but similarities have been noted with basal somphospondylians[50] | ||
| Tyrannotitan | 2005 | Cerro Barcino Formation (Early Cretaceous, Aptian) | Unlike other carcharodontosaurids, its sacral and caudal vertebrae were not pneumatic | ||
| Uberabatitan | 2008 | Serra da Galga Formation (Late Cretaceous, Maastrichtian) | Several individuals are known, some of which are very large | ||
| Unaysaurus | 2004 | Caturrita Formation (Late Triassic, Carnian to Norian) | Described as the first plateosaurid-grade sauropodomorph from Brazil | ||
| Unenlagia | 1997 | Portezuelo Formation (Late Cretaceous, Coniacian) | Could potentially be adapted for flapping due to the structure of its shoulder girdle[51] | ||
| Unquillosaurus | 1979 | Los Blanquitos Formation (Late Cretaceous, Campanian) | Has been suggested to be a dromaeosaurid[52] or a carcharodontosaurid[53] | ||
| Velocisaurus | 1991 | Bajo de la Carpa Formation (Late Cretaceous, Santonian) | Unusually, its third metatarsal is the thickest | ||
| Vespersaurus | 2019 | Rio Paraná Formation (Late Cretaceous) | 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) | May have relied on quick movements of its head and gaze stabilization when hunting | ||
| Volkheimeria | 1979 | Cañadón Asfalto Formation (Early Jurassic, Toarcian) | Its neural spines were very low and flat | ||
| Willinakaqe | 2010 | Allen Formation (Late Cretaceous, Campanian to Maastrichtian) | As originally described, it represented a chimera of two different taxa, one of which was later named Bonapartesaurus[12] | ||
| Xenotarsosaurus | 1986 | Bajo Barreal Formation (Late Cretaceous, Cenomanian to Turonian) | Had an unusually-shaped astragalus and calcaneum | ||
| Yamanasaurus | 2019 | Río Playas Formation (Late Cretaceous, Maastrichtian) | The northernmost saltasaurine known to date[43] | ||
| Ypupiara | 2021 | Serra da Galga Formation (Late Cretaceous, Maastrichtian) | May have been a piscivore due to the shape of its teeth[54] | ||
| Zapalasaurus | 2006 | La Amarga Formation (Early Cretaceous, Hauterivian to Aptian) | Known from an incomplete skeleton, including several caudal vertebrae | ||
| Zupaysaurus | 2003 | Los Colorados Formation (Late Triassic, Norian) | Although commonly depicted with head crests, they may in fact be misplaced lacrimal bones[55] |
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.

Lists of dinosaurs by continent | ||
|---|---|---|
| Non-avian dinosaurs |
| |
| Birds | ||