Revista Brasileira De Paleontologia最新文献

{"title":"The paleoecology of Pleistocene giant megatheriid sloths: stable isotopes (δ13C, δ18O) of co-occurring Megatherium and Eremotherium from southern Brazil","authors":"R. P. Lopes, S. Dillenburg, J. Pereira, A. Sial","doi":"10.4072/rbp.2021.3.06","DOIUrl":"https://doi.org/10.4072/rbp.2021.3.06","url":null,"abstract":"The Pampa in subtropical Brazil (State of Rio Grande do Sul) is the only area of South America known so far where fossils of the Pleistocene giant megatheriid sloths Megatherium americanum, characteristic of subtropical-temperate areas, and Eremotherium laurillardi, widespread in the tropical zone, were discovered in the same deposits (Pessegueiro Creek and Chuí Creek), but it is not clear whether this co-occurrence is a product of taphonomic mixture, or co-existence, which would imply niche partitioning. In order to understand their paleoecology and reconstruct the associated paleoenvironments, dentin samples of both megatheriids from the two sites were analyzed for their carbon (δ13C) and oxygen (δ18O) isotope ratios. The δ13C values of Megatherium indicate mixed diet of C3-C4 plants with higher content of the latter in Pessegueiro Creek, whereas the δ13C values of Eremotherium indicate C3-dominated diets, the more negative value in Pessegueiro Creek possibly related to the canopy effect. The δ18O of Eremotherium points to 18O-depleted water sources, possibly also influenced by the diet, whereas Megatherium ingested 18O-enriched water. The results show that co-existence of both megatheriids would have been ecologically possible, and that the Pampa was occupied by open grasslands/woodlands, with closed forests in Pessegueiro Creek. The δ13C of Eremotherium from intertropical Brazil indicate a more generalist habit than Megatherium from subtropical Brazil and Argentina, which probably facilitated its dispersion from the tropics up to subtropical areas along two different routes, one along the coastal plain, and the other along the Paraná River Basin across central South America, following the southward expansion of riparian forests during warmer stages. The reduction of those forests during intervening cold stages possibly led to its disappearance in southern Brazil. Keywords: Quaternary, paleobiogeography, stable isotopes, Pampa, coastal plain, megafauna.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42417226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fossil Holocene Ostracoda from the Itapeva Lake, Southern Brazilian coastal plain","authors":"Leonardo Timm Steiner Campos, Lucas DE Oliveira Nunes, C. T. Bergue","doi":"10.4072/rbp.2021.2.01","DOIUrl":"https://doi.org/10.4072/rbp.2021.2.01","url":null,"abstract":"Holocene ostracods from a core obtained in the Itapeva Lake, Rio Grande do Sul coastal plain, are studied in this paper. Twenty-six species belonging to 22 genera and 13 families were registered in nine samples analyzed, two of them new: Cytherella eros sp. nov. and Loxoconcha itapevensis sp. nov. The taxonomic composition of the assemblages varies along the core, being Cyprideis multidentataHartmann the most abundant and frequent species (273 specimens), followed by Cytheretta punctata Sanguinetti (56 specimens) and L.itapevensis sp. nov. (51 specimens). Variation in richness and diversity observed along the core probably results from sedimentary and hydrological changes during the evolution of the Itapeva Lake. The results obtained in this work reinforce the importance of ostracods in the study of coastal paleoenvironments. Keywords: barrier-lagoon system, biostratinomy, micropaleontology, Quaternary.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46481217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A incomum associação de peixes e caranguejos da Formação Romualdo, Aptiano-Albiano da Bacia sedimentar do Araripe, NE do Brasil","authors":"Ludmila Alves Cadeira do Prado, Gabriel Levi Barbosa Lopes, Priscilla Albuquerque Pereira, Rilda Verônica Cardoso de Araripe, David Holanda de Oliveira, Flavia Azevedo Pedrosa Lemos, L. S. D. Nascimento, Maria Emília Travassos Rios Tomé, A. F. Barreto","doi":"10.4072/rbp.2021.2.06","DOIUrl":"https://doi.org/10.4072/rbp.2021.2.06","url":null,"abstract":"The unusual association of fish and crabs from Romualdo Formation, Aptian–Albian of the Araripe sedimentary Basin, NE Brazil. In a study and collection of fossils from the Romualdo Formation in “Araripe pernambucano”, an association of Vinctifer comptoni and Rhacolepis buccalis with eubrachyurans and orithopsids crabs was observed in four calcareous nodules. Associations were discussed based on ecological and taphonomic hypotheses. It is noted from the degree of articulation of the organisms, that either the death or the availability of crab moults in the sediment possibly occurred before the death of the fish. In addition, the fish do not have teething consistent with feeding on crabs. Thus, this association would occur due to fossilization processes and not due to ecological interactions. The study also emphasized systematic and paleogeographic aspects of the groups. Romualdocarcinus salesi is probably related to the “higher” true crabs (Eubrachyura), a hypothesis already raised in previous works, due to the preservation of its dorsal carapace next to a pleon of subquadrangular shape similar to those seen in this group. The occurrence of Exucarcinus gonzagai associated with fish, in concretions in the shales, can raise the question of E. gonzagai and Araripecarcinus ferreirai species as synonyms. The data obtained with the survey of the paleogeographic distribution of fish and crabs in geological formations of correlated age corroborates the hypothesis of the Tethyan marine influence in Araripe. Keywords: ichthyolites, decapods, paleoecology, taphonomy, Santana Group, Cretaceous.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46204599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Preliminary foraminiferal survey in Chichiriviche de La Costa, Vargas, Venezuela","authors":"H. Carvajal-Chitty, S. Navarro","doi":"10.4072/rbp.2021.2.02","DOIUrl":"https://doi.org/10.4072/rbp.2021.2.02","url":null,"abstract":"A preliminary study of the composition and community structure of the foraminifera of Chichiriviche de La Costa (Vargas, Venezuela) is presented. A total of 105 species were found in samples from 10 to 40 meter-depth, and their abundance quantified in a carbonate prone area almost pristine in environmental conditions. The general composition varies in all the samples: at 10 m, Miliolida dominates the assemblages but, as it gets deeper, Rotaliida takes control of the general composition. The Shannon Wiener diversity index follows species richness along the depth profile, meanwhile the FORAM index has a higher value at 20 m and its lowest at 40 m. Variations in the P/(P+B) ratio and high number of rare species are documented and a correspondence multivariate analysis was performed in order to visualize the general community structure. These results could set some basic information that will be useful for management programs associated with the coral reef in Chichiriviche de La Costa, which is the principal focus for diver’s schools and tourism and could help the local communities to a better understanding of their ecosystem values at this location at Vargas State, Venezuela. Keywords: Miliolida, Rotaliida, foraminiferal assemblages, FORAM index, Caribbean continental shelf.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48976929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evolution of the Semideciduous-Riparian Forest (ecotone Cerrado-Atlantic Forest) during the late Holocene, Southeast of Brazil","authors":"Melina Mara Souza, F. Ricardi-Branco","doi":"10.4072/rbp.2021.2.04","DOIUrl":"https://doi.org/10.4072/rbp.2021.2.04","url":null,"abstract":"The floodplains of meandering rivers in southeastern Brazil represent places where the sedimentary record associated with the history of transition/ecotone areas and exchange of biomes accumulates, such as the Cerrado (Cerradão Forest) and Atlantic Forest (Semideciduous-Riparian Forest). The present study aims to use palynological, isotopic (δ13C, δ15N and 14C), and anthracological indicators in cores taken from three abandoned meander bends to make inferences about environmental evolution, vegetation reconstruction, and climatic inferences. The study area is located in the Mogi Guaçu River Basin, in the countryside of São Paulo State. The studies show that ~2,730 BP (stage I), the area underwent through a more humid climatic phase compared to the current one, which allowed the expansion of the Riparian Semideciduous Forest. After that date, in stage II (1,800 to 510 BP), the percentage of the Cerrado (Cerradão Forest) increased, due to a drier period. From 510 BP to the present day (stage III), humidity has taken place with a new expansion of the Riparian Semideciduous Forest, although elements of Cerrado are present. Microscopic charcoal fragments were found in all stages and may infer the incidence of paleo-wildfires during the Late Holocene. The results indicate that both phytophysiognomies remained for the studied period, varying their expansion depending on the humidity present in each stage. Although lakes formed by abandoned meanders are not areas with the best palynological record, they are frequent environments in the interior of the continents. If properly interpreted, they may provide relevant information to vegetation and climatic changes for the areas. Keywords: paleoenvironmental studies, Holocene, river dynamics, pollen grains, isotopic analysis, charcoal fragments.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45204302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First occurrence of the giant shark Carcharocles megalodon (Agassiz, 1843) (Lamniformes; Otodontidae) at Buenos Aires Province, Argentina","authors":"Julieta De Pasqua, F. Agnolín, A. M. A. Rolando, S. Bogan, Diego Gambetta","doi":"10.4072/rbp.2021.2.05","DOIUrl":"https://doi.org/10.4072/rbp.2021.2.05","url":null,"abstract":"Carcharocles megalodon is considered a macropredatory shark that inhabited the seas around the world from middle Miocene to late Pliocene. In Argentina, it has only been formally recorded at two localities. Here, we report the first record for this taxon in the Buenos Aires Province. This occurrence is based on an isolated tooth recovered on the beach at the Punta Médanos locality, which lacks clear stratigraphic context. Based on the regional geology, the specimen probably came from Pliocene beds. Its size indicates that it probably belongs to a juvenile individual. Keywords: Carcharocles megalodon, macropredatory shark, fossil teeth, Mar de Ajó.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43015078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pleistocene plants from Zarzal Formation, middle valley of the Cauca River Basin, Colombia","authors":"Maria Alejandra Rojas-Granada, Arnol Cardozo-Rueda, Carlos Alberto Agudelo Henao, J. Guzmán, Paula Andrea Sucerquia Rendon","doi":"10.4072/rbp.2021.2.03","DOIUrl":"https://doi.org/10.4072/rbp.2021.2.03","url":null,"abstract":"We report macro and meso palaeobotanical records from the Zarzal Formation, in the Cauca River Depression, and the Quindío-Risaralda Basin between the Western and the Central Cordilleras of Colombia. The fossils correspond to leaves and seeds obtained from layers of mudstones, diatomites, and tuffaceous sandstones deposited in the inter-Andean valleys of Cauca and La Vieja rivers, separated by the Serranía Santa Bárbara ridge between the Valle del Cauca and Quindío departments. The sediments of the Pleistocene Zarzal Formation were deposited in a fluvial-lacustrine environment, with volcanic influence originated in the Central Cordillera to the east of the depositional area. The study here presented allowed the identification of thirteen morphotypes of leaf impressions grouped in six Angiosperm families: Poaceae?/Cyperaceae? and Araceae of the Monocots group, Melastomataceae, Fabaceae and Lauraceae belonging to the Eudicots group and one family of Lycopsida: Thelypteridaceae. On the other hand, very well-preserved silicified micro-seeds were grouped in eight morphotypes, belonging to the botanical groups Cyperaceae and Asteraceae. The fossils found allowed us to identify two types of plant associations that exhibit paleofloristic richness. In the Cauca River Basin, an autochthonous to parautocthonous plant association could correspond to a sub-Andean gallery forest, whilst in the La Vieja River Basin a parautocthonous plant association indicates a swamped floodplain. Keywords: paleoflora, leaves, seeds, Cauca River, La Vieja River, lacustrine deposit.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43576713","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biostratigraphy of the Upper Devonian Khoshyeilagh Formation in NE Iran based on conodonts and other faunas","authors":"Fatemeh Jafarbeigloo, M. Majidifard, B. Hamdi, A. Asghari, M. Arian","doi":"10.4072/RBP.2021.1.02","DOIUrl":"https://doi.org/10.4072/RBP.2021.1.02","url":null,"abstract":"The Khoshyeilagh Formation located in the northeast of Iran yielded seven conodont species and sub-species and 19 macro- and microfossil taxa that allow recognition of two conodont biozones and one biozone based on calcareous microfossils. The latest Frasnian age (the Upper rhenana to linguiformis zones) is attributed to the topmost strata with Icriodus alternatus. Its replacement with I. cornutus indicates the Famennian (Lower triangularis to Lower crepida zones) corresponding to the Umbellina Zone. The fossil assemblages identified in the Khoshyeilagh Formation represent a shallow marine environment with a tropical climate at the time of deposition. The fossil species from the Khoshyeilagh Formation and the sedimentary basins in Algeria, Libya, Morocco, Poland, and Russia reveal a close connection between the Iranian plateau and the northern parts of Gondwana in the Late Devonian. The biofacies and lithofacies analyses show a sea level decline at the end of Frasnian, followed by a considerable sea level drop, as in other regions of the world. After a short time, in the Famennian, the deepening occurred in some parts of the area and the open marine facies (bioclast spicule wackestone-packstone) were deposited. This study is the first attempt to determine Frasnian-Famennian boundary based on conodont assemblages and other fossil species such as umbellulids, tentaculites, and ostracods. The distribution of these species is interpreted in sedimentological, stratigraphic, sequence stratigraphy, and the global eustatic context.\u0000Keywords: biofacies, conodont, Frasnian-Famennian boundary, Late Devonian, NE Iran.\u0000RESUMO – A Formacao Khoshyeilagh, localizada no nordeste do Ira, produziu sete especies de conodontes e subespecies e 19 taxons de macro- e microfosseis, o que permite o reconhecimento de duas biozonas de conodontes e uma biozona baseada nos microfosseis calcareos. A idade Frasniana mais superior (as zonas superiores rhenana a linguiformis) e atribuida ao estrato mais superior com Icriodus alternatus. A sua substituicao por I. cornutus indica o Famenniano (zonas iniciais triangularis superior a crepida superior), correspondendo a Zona de Umbellina. Os fosseis identificados na Formacao Khoshyeilagh representam um ambiente marinho raso, com um clima tropical, no momento de deposicao. As especies fosseis da Formacao Khoshyeilagh e as bacias sedimentares na Argelia, Libia, Marrocos, Polonia e Russia revelam uma conexao intima entre o plato iraniano e as partes norte do Gondwana no Neodevoniano. As biofacies e litofacies analisadas mostram um declinio do nivel do mar no final do Frasniano, seguido por uma consideravel queda do nivel do mar, como em outras regioes do mundo. Apos um curto tempo, no Famenniano, o aprofundamento ocorreu em algumas partes da area, e a facies marinha aberta (bioclast spicule wackestone-packstone) foi depositada. Este estudo e a primeira tentativa de determinar o limite Frasniano-Famenniano com base em associacoes de conod","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":"24 1","pages":"21-36"},"PeriodicalIF":0.7,"publicationDate":"2021-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47641292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Paleontologia e ensino básico: análise dos Parâmetros Curriculares Nacionais e dos livros didáticos em Juiz de Fora, MG, Brasil","authors":"Camila Neves Silva, Micaela Aparecida Faria Mendes, M. M. Carvalho, Gustavo Martins Stroppa","doi":"10.4072/RBP.2021.1.05","DOIUrl":"https://doi.org/10.4072/RBP.2021.1.05","url":null,"abstract":"Paleontology and basic education: analysis of Parâmetros Curriculares Nacionais and textbooks in Juiz de Fora, MG, Brazil. Paleontology has a crucial role in teaching Science and Biology for helping to understand different natural processes, although there is limited space in its school approach. It is necessary to understand how its content has been worked by the teachers, both quantitatively and qualitatively. In order to understand how their themes are addressed by basic education textbooks, in private and public schools in Juiz de Fora, after analyzing the Parâmetros Curriculares Nacionais (National Curriculum Parameters, translated by the authors) - PCNs and their guidelines, from the sixth to the ninth year of elementary school and of the entire high school, a table of presence or absence was set up, with the main themes in Paleontology indicated, analyzing which were present in each book. For qualitative analysis, 11 questions were listed. The analysis included 22 themes in 18 elementary school and 15 high school books. High school books had the largest number of topics covered, with 123 presences, and elementary school, 69. The most present themes were: “Origin of Life”, “Theory of Evolution” and “Fossil Concept”; the least addressed: “Types of Fossils”, “Fossils as Non-Renewable Natural Resources” and “Great Extinctions”. Most books deal with subjects with no connection with other areas, without contextualization, with rare interdisciplinarity and relationship with environmental issues, necessary to confront science denialism and the recent risks of educational retrogression. The results reveal the importance of broadening the discussion on how to address Paleontology in basic education, assessing school incentives, teachers’ motivation, the perception of the importance of teaching this science, and the use of other tools besides the textbook.\u0000Keywords: science teaching, Base Nacional Comum Curricular, school, environmental education, fossils.\u0000RESUMO – Por auxiliar na compreensao de diversos processos naturais, a Paleontologia tem crucial papel no ensino de Ciencias e Biologia, embora haja espaco limitado em sua abordagem escolar. E preciso compreender como seu conteudo tem sido trabalhado pelos/as docentes, quantitativamente e qualitativamente. Para entender como seus temas sao abordados pelos livros didaticos do ensino basico em escolas particulares e publicas de Juiz de Fora, apos analise das diretrizes dos Parâmetros Curriculares Nacionais - PCN, do sexto ao nono ano do Ensino Fundamental e de todo o Ensino Medio, foi montada uma tabela de presenca ou ausencia, com os principais temas em Paleontologia indicados, analisando-se quais constavam em cada livro. Para analise qualitativa, foram elencadas 11 questoes. A analise abrangeu 22 temas em 18 livros do Ensino Fundamental e 15 do Ensino Medio. Os livros do Ensino Medio tiveram maior numero de temas abordados, com 123 presencas, e o Ensino Fundamental, 69. Os temas mais presentes fora","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":"24 1","pages":"62-69"},"PeriodicalIF":0.7,"publicationDate":"2021-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45418065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quaternary proboscidean (Mammalia) remains of the UIS Geological Museum, Colombia","authors":"J. Y. Suárez-Ibarra, G. Cardoso, Lidiane Asevedo, L. D. M. França, M. Dantas, L. E. Cruz-Guevara, Andrés Felipe Rojas-Mantilla, A. M. Ribeiro","doi":"10.4072/RBP.2021.1.06","DOIUrl":"https://doi.org/10.4072/RBP.2021.1.06","url":null,"abstract":"Proboscideans arrived in South America from North America during the Great American Biotic Interchange, becoming one of the most representative animals of the megafauna thatinhabited this continent throughout the Quaternary. In Colombia, the abundance of their remains contrasts with scarce scientific descriptions and publications. This paper identifies dental and postcranial proboscidean fossils from the Center and Northeast of Colombia. The fossil remains were identified as molars (six), a tusk, cervical vertebrae, and a distal part of the right humerus. The tusk was assigned to Notiomastodon platensis, while the other remains were assigned to Gomphotheriidae, with at least six individuals: two immatures, two subadults, and two older adults–mature and senile.\u0000Keywords: South America, megamammals, taxonomy, Gomphotheriidae, Notiomastodon platensis.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":"24 1","pages":"70-75"},"PeriodicalIF":0.7,"publicationDate":"2021-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47313120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}