Rodrigo Temp Müller

Rodrigo Temp Müller
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Rodrigo verified their affiliation via an institutional email.
  • PhD
  • Paleontologist at Federal University of Santa Maria

About

131
Publications
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1,892
Citations
Current institution
Federal University of Santa Maria
Current position
  • Paleontologist

Publications

Publications (131)
Article
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Herrerasauridae were among the first large carnivorous dinosaurs. Although their anatomy and phylogenetic relationships have been previously studied, little is known about their paleobiology. Bone pathologies provide clues about the behaviour of ancient organisms, and this study evaluates presumed craniofacial pathologies in herrerasaurid specimens...
Article
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Proterochampsidae is a clade of archosauriform reptiles that lived during the Triassic Period, with notable fossil records in South America. Among these, Ladinian deposits in Brazil have yielded the oldest proterochampsids worldwide, offering insights into the origins of the group. However, their record from this interval remains scarce, with only...
Article
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Pterosaurs, remarkable for their extensive evolutionary history and role as the first vertebrates to achieve active flight, have long intrigued paleontologists and the public alike. Spanning over 150 million years and vanishing at the end of the Mesozoic Era, pterosaurs represent a major evolutionary radiation within terrestrial ecosystems. Despite...
Article
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Traversodontids, a group of herbivorous/omnivorous stem-mammals (eucynodonts), were diverse and widely distributed during the Middle and Late Triassic. Among these, the derived clade Gomphodontosuchinae stands out within Traversodontidae. This study employs a comprehensive multiproxy approach to describe the postcranial anatomy of a new specimen of...
Article
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Hypercanines, or hypertrophied canines, are observed in a wide range of both extinct and extant synapsids. In non‐mammaliaform cynodonts, the Permo‐Triassic forerunners of mammals, long canines are not uncommon, appearing in several unrelated taxa within the clade. Among them is Trucidocynodon riograndensis, a carnivorous ecteniniid cynodont from t...
Conference Paper
O sítio fossilífero Várzea do Agudo, no sul do Brasil (Sequência Candelária da Supersequência Santa Maria, Zona de Associação Hyperodapedon, Carniano), é conhecido por sua rica fauna de paleovertebrados, oferecendo valiosos insights paleoecológicos. Em relação às inferências icnológicas, estudos anteriores relataram bioerosão em ossos do cinodonte...
Article
Dinosaurs arose in the Late Triassic and diversified during the subsequent periods of the Mesozoic Era. The oldest unequivocal dinosaurs come from Carnian deposits of Brazil, Argentina, India, and Zimbabwe, with sauropodomorphs representing the bulk of this record. Saturnalia tupiniquim was described from Brazilian strata in 1999 as the first Carni...
Article
Traversodontid cynodonts are one of the most abundant and diverse groups of tetrapods in the Triassic assemblages of Brazil. These cynodonts are distributed across four Brazilian Assemblage Zones (AZ), ranging from the late Ladinian to the early Norian. The most taxonomically diverse record comes from the Dinodontosaurus AZ, which has so far yielde...
Chapter
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RESUMO Conhecer a fauna e a flora do passado, presentes na atual região em que está localizado o Sul do país, é algo instigador. O patrimônio paleontológico tende a resgatar a história do local além de estimular perguntas. O Geoparque Quarta Colônia localizado na região central do Rio Grande do Sul é uma área importantíssima para a conservação da h...
Article
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Before the rise of dinosaurs and pterosaurs, pseudosuchians—reptiles from the crocodilian lineage—dominated the Triassic land ecosystems. This lineage diversified into several less inclusive clades, resulting in a wide ecomorphological diversity during the Middle and Late Triassic. Some giant pseudosuchians occupied the top of the trophic webs, whi...
Article
Lagerpeton chanarensis is an early avemetatarsalian from the lower Carnian (lowermost Upper Triassic) levels of the Chañares Formation, La Rioja Province, Argentina. Lagerpeton and its kin were traditionally interpreted as dinosaur precursors of cursorial habits, with a bipedal posture and parasagittal gait. Some authors also speculated saltatorial...
Article
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The Carnian (Upper Triassic) rocks of the Candelária Sequence present a rich record of dinosaurs, including some of the oldest known dinosaurs worldwide. In this contribution we describe the first unequivocal dinosaur from the Pivetta site, located in the Restinga Sêca municipality, Southern Brazil. The specimen CAPPA/UFSM 0373 is an isolated but w...
Article
The Gondwana formations exposed in the Pranhita‐Godavari Valley of central India include Middle Triassic to Lower Jurassic continental deposits that provide essential information about the tetrapod assemblages of that time, documenting some of the oldest known dinosaurs and the first faunas numerically dominated by this group. The Upper Maleri Form...
Article
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The early radiation of dinosaurs was an evolutionary event characterized by distinct episodes. While the earliest unequivocal records are from Carnian strata and relatively well-documented, the subsequent moment of dinosaur radiation is poorly studied. The fossil record of early Norian dinosaurs from Brazil provides one of the best samples regardin...
Article
Agudotherium gassenae is a poorly known non‐mammaliaform probainognathian cynodont from the Late Triassic of southern Brazil. It is known only by mandibular remains, and its affinities within Probainognathia are unclear. Furthermore, its phylogenetic affinities were never investigated through computational analyses. In this study, we described new...
Article
Buriolestes schultzi is a small sauropodomorph dinosaur from Carnian beds (ca., 233 Ma) of southern Brazil. It is one of the earliest members of that lineage and is a key taxon to investigate the initial evolution of Sauropodomorpha. Here, we attribute a new specimen to B. schultzi from Late Triassic of southern Brazil, which represents the first o...
Article
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Dinosaurs and pterosaurs have remarkable diversity and disparity through most of the Mesozoic Era1–3. Soon after their origins, these reptiles diversified into a number of long-lived lineages, evolved unprecedented ecologies (for example, flying, large herbivorous forms) and spread across Pangaea4,5. Recent discoveries of dinosaur and pterosaur pre...
Article
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The lineage of sauropodomorph dinosaurs raised some of the most impressive animals that ever walked on Earth. However, the massive titans of the Mesozoic Era originated from far smaller dinosaurs. The Triassic beds from Brazil yielded the earliest part of this evolutionary history. Despite the diverse fossil record of early sauropodomorphs, juvenil...
Article
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Comprising the oldest unequivocal dinosauromorphs in the fossil record, silesaurs play an important role in the Triassic radiation of dinosaurs. These reptiles provide the main source of information regarding the ancestral body plan of dinosaurs, as well as the basis for biogeographic models. Nevertheless, the co-occurrence of silesaurs and the old...
Article
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One of the most remarkable features in sauropod dinosaurs relates to their pneu-matized skeletons permeated by a bird-like air sac system. Many studies described the late evolution and diversification of this trait in mid to late Meso-zoic forms but few focused on the origin of the invasive respiratory diverticula in sauropodomorphs. Fortunately, i...
Article
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Tupuxuara deliradamus' was originally described as a tapejarid pterosaur from the Lower Cretaceous Romualdo Formation (Albian) of the Araripe Basin, Northeastern Brazil, and was regarded later by other authors as an indeterminate azhdarchoid. Whereas its taxonomic status remains controversial, its phyloge-netic affinities were never investigated un...
Article
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Triassic cynodonts from South America are key taxa in the investigation of the emergence of mammalian characters. One of the most iconic species from the Carnian is Prozostrodon brasiliensis, found in Late Triassic strata from southern Brazil. This non-mammaliaform cynodont represents the earliest-diverging member of Prozostrodontia, a clade that e...
Article
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The origin of the air sac system present in birds has been an enigma for decades. Skeletal pneumaticity related to an air sac system is present in both derived non-avian dinosaurs and pterosaurs. But the question remained open whether this was a shared trait present in the common avemetatarsalian ancestor. We analyzed three taxa from the Late Trias...
Article
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Characterized by an elongated snout, proterochampsids are carnivorous non-archosaur archosauriforms. The clade is endemic to South America and its fossil record extends from the early Carnian to the late Carnian/early Norian. Nesting close to Archosauria, it is a key clade for understanding the origin and evolution of archosaurian traits. Unfortuna...
Article
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Discoveries from South America have increased our knowledge on the early evolutionary history of sauropodomorph dinosaurs. The dietary shift from faunivorous to herbivorous creatures and the increasing body size are both widely documented in the fossil record. Conversely, the initial evolution of the elongated neck is poorly known. It is one of the...
Conference Paper
Full-text available
Caracterizados por um rostro alongado, os proterochampsídeos são arcossauriformes não-arcossauros geralmente considerados predadores. O clado é endêmico da América do Sul e seu registro fóssil estende-se do início do Carniano até o início do Noriano. Aninhado próximo ao nodo que suporta Archosauria, acaba sendo um clado chave para entender a origem...
Article
Dinosaur footprints often occur in Late TriassicEarly Jurassic continental sedimentary rocks. While many such tracks can readily be associated with the kinds of dinosaurs that made them, the makers of some footprints have been controversial. Large tridactyl (three-toed) footprints of the ichnogenus Eubrontes are thought by most paleontologists to h...
Article
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The origin and evolutionary relationships of ornithischian dinosaurs are topics that have undergone a series of substantial revisions. At present there are several competing hypotheses concerning the relationship between Ornithischia and the other principal clades of Dinosauria. Some hypotheses have posited a tree topology within Dinosauria that im...
Article
The Triassic deposits of South America are key to understand the early radiation of Dinosauromorpha. Though the fossil record of the group is relatively abundant in Carnian- and Norian-aged strata from Argentina and Brazil, Middle Triassic dinosauromorphs are scarce, at least in the Brazilian record. In this contribution, we describe a set of fossi...
Article
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Faxinalipterus minimus was originally described as a purported pterosaur from the Late Triassic (early Norian) Caturrita Formation of southern Brazil. Its holotype comprises fragmentary postcranial elements, whereas a partial maxilla was referred to the species. The assignment of Faxinalipterus minimus to Pterosauria has been questioned by some stu...
Chapter
Carnian (Late Triassic) deposits of South America provide the oldest unequivocal dinosaur records worldwide, most of which has been assigned to the sauropodomorph lineage. This includes Eoraptor lunensis, Panphagia protos, and Chromogisaurus novasi, from the Ischigualasto Formation, Argentina, and Saturnalia tupiniquim, Pampadromaeus barberenai, Bu...
Article
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Exquisite discoveries and new interpretations regarding an enigmatic group of cursorial avemetatarsalians led to a new phylogenetic hypothesis regarding pterosaur affinities. Previously thought to be dinosaur precursors, lagerpetids are now considered to be the closest relatives to pterosaurs. This new hypothesis sheds light on a new explorable fie...
Article
Whereas the oldest dinosaur skeletons have been excavated from mid to late Carnian beds of South America, its close relatives occur in Anisian to early Carnian deposits from Argentina, Tanzania and Zambia. These close relative forms are key taxa regarding the investigation of macroevolution of dinosauromorphs. Early dinosaurs are well-documented fr...
Article
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Whereas sauropod dinosaurs from the Jurassic and Cretaceous Periods were the largest land animals that ever lived, some of their early relatives evolved relatively large bodies during the Triassic Period. The evolutionary pathways followed by the earliest sauropodomorphs towards the acquisition of massive bodies are poorly understood. However, new...
Article
The anterolateral scar is a raised and generally rounded ossification on the anterolateral face of the femoral head of certain archosaurs, located anterior to the ‘greater trochanter’ and posterior to the femoral head. The presence and shape of this structure in early dinosaurs is still poorly understood. In the present study, the shape and variati...
Article
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The notarium is a rigid bony structure, which resulted from the fusion of thoracic vertebrae of some pterosaurs and birds. It is high variable, ranging from two to six fused thoracic vertebrae. In this study, we reviewed and analyzed approximately 270 specimens of neornithine birds (representing 80% of the living orders) and some fossils in order t...
Article
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Irajatherium hernandezi is a poorly known non‐mammaliaform cynodont from the Late Triassic of southern Brazil. A new specimen of this cynodont was found in recent fieldwork to the type‐locality, Sesmaria do Pinhal (Candelária), providing new insights into the anatomy of this mammalian forerunner. This specimen comprises a partial skull preserving t...
Article
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Owenettids are small procolophonoids that survived beyond the Permo-Triassic boundary. The fossil record of owenettids range from the upper Permian to the Middle Triassic. These records come from South Africa, Madagascar, Tanzania, Germany, and Brazil. Despite its conservative anatomy, some species depict some peculiar traits, such as Candelaria ba...
Conference Paper
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Os depósitos da Sequência Candelária (Triássico Superior, Rio Grande do Sul) detêm os mais antigos registros inequívocos de dinossauros do mundo. Os esqueletos destes dinossauros fornecem dados essenciais para estruturar hipóteses paleobiológicas e macroevolutivas a respeito deste grupo tão importante. Um dos exemplares mais notáveis envolve o espé...
Article
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The study of sensorial systems of extinct animals provides clues on their biology and behaviour. Olfaction is an important sensory modality, which is used in a range of tasks, such as foraging, reproduction, predator avoidance and social interaction. The olfactory acuity of dinosaurs has been investigated through quantitative approaches. However, t...
Article
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Triassic beds from Argentina and Brazil provide the most relevant fossil record of early dinosauriforms in terms of numerical abundance and taxonomic diversity. This record currently represents the best source to understand the origin and early evolutionary radiation of dinosaurs. In the present paper we offer an updated review focused on the avail...
Article
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Traversodontidae is a group of Triassic herbivorous/omnivorous cynodonts that represents the most diversified lineage within Cynognathia. In southern Brazil, a rich fossil record of late Middle/mid-Late Triassic cynodonts has been documented, with Exaeretodon riograndensis Abdala, Barberena, and Dornelles, 2002 and Siriusgnathus niemeyerorum Pavana...
Article
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Upper Triassic (Carnian) strata from the Candelária Sequence of southern Brazil bear the oldest records of dinosaurs worldwide. In consequence, investigation of the specimens yielded by these fossiliferous units is crucial for a more comprehensive knowledge regarding the origin, early diversification and radiation of dinosaurs. Herein we reassess a...
Article
Dicynodonts represent a speciose clade of non-mammalian synapsids that lived from the middle Permian to the Late Triassic, exhibiting a Pangaean distribution. The South American Norian fossil record is represented by two species: Jachaleria colorata from Argentina and J. candelariensis from Brazil. The Brazilian specimens come from a relatively sma...
Article
The early evolution of theropod dinosaurs is poorly understood. Whereas sauropodomorphs are well-known from the oldest dinosaur bearing outcrops, the record of theropods is fragmentary and ambiguous. The Triassic deposits from Brazil yielded some of the oldest dinosaurs worldwide. These dinosaurs came from two distinct Assemblage Zones (AZ): the Hy...
Article
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The present 3D Dataset contains the 3D models of the sacral vertebrae analyzed in "Sacral co-ossification in dinosaurs: The oldest record of fused sacral vertebrae in Dinosauria and the diversity of sacral co-ossification patterns in the group".
Article
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The fusion of the sacrum occurs in the major dinosaur lineages, i.e. ornithischians, theropods, and sauropodomorphs, but it is unclear if this trait is a common ancestral condition, or if it evolved independently in each lineage, or even how or if it is related to ontogeny. In addition, the order in which the different structures of the sacrum are...
Article
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Our knowledge on the anatomy of the first dinosaurs (Late Triassic, 235–205 Ma) has drastically increased in the last years, mainly due to several new findings of exceptionally well-preserved specimens. Nevertheless, some structures such as the neurocranium and its associated structures (brain, labyrinth, cranial nerves, and vasculature) remain poo...
Article
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The Janner site (Upper Triassic of Southern Brazil) has been intensely explored, yielding constant new findings in recent years. Among these some fragmentary dinosaur specimens still not published were sampled. In this contribution, we describe these specimens, which represent five individuals, in order to increase our understanding on the anatomy...
Conference Paper
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Saturnalia tupiniquim foi o primeiro sauropodomorfo inequívoco reconhecido para os estratos Carnianos do Período Triássico. Portanto, os espécimes atribuídos a este táxon foram por vários anos a principal fonte de dados anatômicos a respeito deste grupo na alvorada da Era dos Dinossauros. Combinados, os três espécimes da série-tipo (Museu de Ciênci...
Article
Full-text available
The notarium is the structure formed by fusion of the dorsal vertebrae which occurred independently in pterosaurs and birds. This ankylosis usually involves two to six elements and in many cases, also includes the last cervical vertebra. Fusion can occur in different degrees, uniting the vertebral centra, the neural spines, the transverse processes...
Article
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The morphology of the ankle is a crucial topic towards our understanding of the evolutionary history of Archosauria. The morphology of these bones is directly correlated with posture, and subsequently this provides an important phylogenetic signal. The astragalar anatomy is widely adopted in phylogenetic studies of dinosaurs, however, this bone is...
Article
Full-text available
Whereas ornithischian dinosaurs are well known from Jurassic and Cretaceous deposits, deciphering the origin and early evolution of the group remains one of the hardest challenges for palaeontologists. So far, there are no unequivocal records of ornithischians from Triassic beds. Here, we present an alternative evolutionary hypothesis that suggests...
Article
Full-text available
A new fossiliferous site from the Pinheiros-Chiniquá Sequence (Santa Maria Supersequence) with typical tetrapod components of the Dinodontosaurus Assemblage Zone (AZ) is here described. The new site is included in the Faxinal do Soturno Structural Block. The fossil content is characterized by cranial and postcranial material of rauisuchian archosau...
Article
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Embora o grupo dos dinossauros sauropodomorfos seja amplamente conhecido em virtude dos gigantescos saurópodes, sua origem ainda é pouco compreendida em virtude da escassez de esqueletos completos ou datações precisas. Entretanto, novos achados e datações realizadas em rochas Triássicas do Brasil têm trazido à tona informações valiosas no que tange...
Article
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Ornithosuchidae is one of the most enigmatic clades of Triassic pseudosuchians. The group is composed by three carnivorous species that were excavated from Upper Triassic beds of Scotland and Argentina. We describe the first ornithosuchid from the Upper Triassic sediments of Brazil and explore its phylogenetic affinities and implications for the ev...
Article
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Several new early sauropodomorphs have been described from Carnian South American strata that include the oldest unambiguous dinosaurs worldwide. Hence, these findings suggest a high diversity in the origin of the group. Here we offer three hypotheses based in novel data that can explain this diversity at the first branches of the long evolutionary...
Article
Traversodontidae is a less inclusive clade of cynognathian cynodonts that lived during the Triassic. Recently, a traversodontid from the southern Brazilian Triassic beds was described – Siriusgnathus niemeyerorum – based upon specimens found exclusively in its type-locality. No absolute age or index fossils have been reported for this locality, whi...
Article
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Several new sauropodomorphs have been described in recent years, including the unaysaurid sauropodomorph Macrocollum itaquii (Late Triassic, Brazil). This study presents a detailed description of the craniomandibular anatomy of M. itaquii based on the holotype, a paratype and a newly referred specimen. A phylogenetic analysis using an updated datas...
Article
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The present 3D Dataset contains the 3D models of the skull, brain and inner ear endocast analyzed in "Gnathovorax cabreirai: a new early dinosaur and the origin and initial radiation of predatory dinosaurs". Model IDs Description M3#442 3D model of the skull M3#443 3D model of the braincase M3#444 Endocast of brain, inner ear, and cranial nerves Ta...
Article
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Predatory dinosaurs were an important ecological component of terrestrial Mesozoic ecosystems. Though theropod dinosaurs carried this role during the Jurassic and Cretaceous Periods (and probably the post-Carnian portion of the Triassic), it is difficult to depict the Carnian scenario, due to the scarcity of fossils. Until now, knowledge on the ear...
Conference Paper
Full-text available
As rochas triássicas da região central do Rio Grande do Sul, principalmente Santa Maria e Quarta Colônia, com cerca de 233 milhões de anos, abrigam os mais antigos registros de dinossauros do mundo, bem como diferentes linhagens de dinossauromorfos não-dinossaurianos. Sendo assim, estudar seus espécimes é essencial para se obter um entendimento abr...
Article
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Saturnalia tupiniquim is a sauropodomorph dinosaur from the Late Triassic (Carnian–c. 233 Ma) Santa Maria Formation of Brazil. Due to its phylogenetic position and age, it is important for studies focusing on the early evolution of both dinosaurs and sauropodomorphs. The osteology of Saturnalia has been described in a series of papers, but its cran...
Article
Full-text available
Discoveries in Carnian-aged rocks are establishing a rich and diverse dinosaurian fauna at the so-called 'dawn of the age of dinosaurs' in the Late triassic of Western Gondwana. Accordingly, Brazilian strata from the Candelária Sequence have contributed extensively to this trend. here, we present a new dinosaurian specimen (CAPPA/UFSM 0200) from th...
Article
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The controversial dinosauriform Teyuwasu barberenai Kischlat, 1999 (Fig. 1B) is based on a right femur (BSPG AS XXV 53) and tibia (BSPG AS XXV 54), formerly referred to the pseudosuchian ‘Hoplitosuchus raui’ (= Hoplitosaurus raui) Huene, 1938 (see also Huene, 1942). This material comes from a classic Late Triassic (Carnian) locality in southern Bra...
Article
Late Triassic deposits from south Pangea (Argentina and Brazil) bear the oldest (so far) and most informative unequivocal records of dinosaurs worldwide. Herein we describe a new lagerpetid dinosauromorph from a classic dinosaur-bearing locality (Cerro da Alemoa site) from the Candelária Sequence (Santa Maria Formation), southern Brazil, and report...
Article
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In the present contribution, we aim to present the osteology of ‘ULBRA-PVT-281’, which comprises the best-preserved skeleton of Prestosuchus chiniquensis ever found. ULBRA-PVT-281 combines the morphology of two classic specimens referred to P. chiniquensis, UFRGS-PV-0156-T and UFRGSPV- 0152-T, reunited in a single operational taxonomic unit (OTU) i...
Article
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The rise of sauropodomorphs is still poorly understood due to the scarcity of well-preserved fossils in early Norian rocks. Here, we present an association of complete and exceptionally well-preserved dinosaur skeletons that helps fill that gap. They represent a new species, which is recovered as a member of a clade solely composed of Gondwanan Tri...
Conference Paper
Full-text available
Lagerpetidae é um grupo composto por pequenos arcossauros cursoriais, com abrangência temporal restrita ao Triássico. Precursores dos dinossauros, possuem anatomia enigmática, uma vez que a maior parte dos espécimes preserva apenas parte do membro pélvico (e.g., Dromomeron gregorii e Dromomeron romeri). Ainda assim, novos achados (e.g., Dromomeron...
Conference Paper
Full-text available
O registro fossilífero de vertebrados em fácies do Membro Passo das Tropas é escasso quando comparado aquele das fácies pelíticas do Membro Alemoa da Supersequência Santa Maria (Mesotriássico-Neotriássico), caracterizado pela abundância de tetrápodes fósseis como arcossauromorfos e sinápsidos. Neste trabalho, é apresentado o primeiro registro de Ar...
Conference Paper
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Nesta contribuição, reavaliam-se materiais de um grande dinossauro (UFSM 11330), previamente atribuídos a Sauropodomorpha que corresponderiam, ao maior sauropodomorfo Carniano registrado até então. Além da reinterpretação desse espécime, conhecido informalmente como "Saturnalião", são incluídos neste estudo materiais inéditos deste espécime. Juntam...
Article
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The discovery and study of bonebeds can provide unique information on the biology of extinct animals. Here we interpret the taphonomic history of a monotypic bonebed composed by several individuals attributable to the dicynodont Dinodontosaurus sp. collected in a classic locality from the Dinodontosaurus Assemblage Zone (Middle Triassic of Brazil)....
Article
A new Upper Triassic fossiliferous outcrop, the Niemeyer Site, from the Santa Maria Supersequence (Paraná Basin, Southern Brazil) is reported. The lithology found in this locality is consistent with that found in the Candelária Sequence. The high prevalence of traversodontid cynodonts in this site is particularly notable, with collected specimens m...
Article
Full-text available
Ecteniniidae comprises an endemic radiation of carnivore probainognathian cynodonts from the Late Triassic of South America. Three taxa have been included in this clade: Ecteninion lunensis Martínez et al., 1996 and Diegocanis elegans Martínez et al., 2013 from Argentina, and Trucidocynodon riograndensis Oliveira et al., 2010 from Brazil. Herein, a...
Conference Paper
Full-text available
As localidades fossilíferas da região central do Rio Grande do Sul provêm os registros inequívocos dos dinossauros mais antigos do mundo. O afloramento Cerro da Alemoa (29°41'51.86"S; 53°46'26.56"O), localizado na zona urbana da cidade de Santa Maria (Rio Grande do Sul) e pertencente à Zona de Associação de Hyperodapedon da Sequência Candelária (i....

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