Revista Brasileira De Paleontologia最新文献

{"title":"New record of an immature Notiomastodon cf. platensis (Mammalia, Proboscidea) from Pernambuco State, Northeastern Brazil","authors":"Luana Cardoso de Andrade, É. Oliveira, Dimila Mothé, V. Maniesi","doi":"10.4072/rbp.2020.1.05","DOIUrl":"https://doi.org/10.4072/rbp.2020.1.05","url":null,"abstract":"Proboscideans are megamammals widely recorded in South America Quaternary deposits, especially in Brazil, where many specimens were found in tanks and caves. In tank deposits, the fossil remains are usually recognized as adult individuals, although highly and usually fragmented. The records of immature proboscideans are rare, consisting of isolated teeth and jaw fragments, especially from tank deposits. Here we describe a new and rare occurrence of an immature proboscidean — a second upper left deciduous premolar (DP2) of Notiomastodon cf. platensis — from Pernambuco state, Brazil. This record increases the number of immature individuals known for Notiomastodon in Brazil, contributes to the understanding of the frequency of immature individuals in tank deposits, and increases Notiomastodon geographic distribution in South America.\u0000Keywords: South America, Quaternary, Notiomastodon platensis, immature, tank deposit.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2020-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46903282","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":"Palinomorfos esporopolínicos na plataforma continental interna sul do Rio Grande do Sul, Brasil","authors":"D. Diniz, M. Candido, N. Mirlean","doi":"10.4072/rbp.2020.1.03","DOIUrl":"https://doi.org/10.4072/rbp.2020.1.03","url":null,"abstract":"","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2020-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45435921","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 Quaternary Brazilian cave pollen record: morphological descriptions, taxonomic and ecological data","authors":"Aline Goncalves de Freitas, V. Gonçalves-Esteves, C. B. Mendonça, S. Fernández, J. Carrión","doi":"10.4072/rbp.2020.1.02","DOIUrl":"https://doi.org/10.4072/rbp.2020.1.02","url":null,"abstract":"This paper presents descriptions, and taxonomic and ecological data by the angiosperm pollen grains recovered from Quaternary sediments of the Gruta do Urso Cave, Tocantins State, Northern Brazil. Among recovered assemblage, 44 types of angiosperm pollen were identified. Most of the pollen types described here are related to the modern aboreal-shrub and herbaceous-subshrub taxa currently present in the plant communities of the Cerrado biome: (i) forest formations (Annonaceae, Aspidosperma, Ilex, Celtis, Trema, Tournefortia, Protium, Combretaceae-Melastomataceae type, Croton-type, Moraceae-Urticaceae type, cf. Bauhinia brevipes, Cassia, Pithecellobium, Peixotoa, and Cedrela); (ii) savannah formations (Anacardium, Astronium, Asteraceae Tribu Eupatorieae, Caryocar, Cyperaceae, Eriotheca-type, Ludwigia, Pseudobombax spp., Ouratea, Qualea, and Utricularia), and (iii) grasslands (Poaceae). Regarding the diversity of pollen types registered, the most representative botanical families were: Fabaceae (8), Malvaceae (4), Euphorbiaceae (3), Anacardiaceae (3), Apocynaceae (2), Cannabaceae (2), Sapindaceae (2) and Poaceae (2), which also occur in the Cerrado-Caatinga transition. Pollen data show paleovegetation during the Last Glacial Maximum and Holocene times out of the cave, and provides a reliable source for paleoecological, paleoenvironmental and paleoclimatic investigations.\u0000Keywords: palynology, Quaternary, paleovegetation, Brazilian savannah.\u0000Este artigo apresenta as descricoes morfologicas, dados taxonomicos e ecologicos de graos de polen de angiospermas recuperados de sedimentos quaternarios da Gruta do Urso, Estado do Tocantins, Norte do Brasil. Foram registrados 44 tipos polinicos que se relacionam com os taxons arbustivo-arboreos e arbustivo-herbaceos ocorrentes atualmente nas comunidades vegetacionais do bioma Cerrado: (i) formacoes florestais (Annonaceae, Aspidosperma, Ilex, Celtis, Trema, Tournefortia, Protium, Tipo Combretaceae-Melastomataceae, Tipo Croton, Tipo Moraceae-Urticaceae, cf. Bauhinia brevipes, Cassia, Pithecellobium, Peixotoa e Cedrela); (ii) cerrado sensu stricto (Anacardium, Astronium, Asteraceae Tribo Eupatorieae, Caryocar, Cyperaceae, Tipo Eriotheca, Ludwigia, Pseudobombax spp., Ouratea, Qualea e Utricularia) e (iii) gramineas (Poaceae). Quanto a diversidade polinica, as familias botânicas mais representativas foram: Fabaceae (8), Malvaceae (4), Euphorbiaceae (3), Anacardiaceae (3), Apocynaceae (2), Cannabaceae (2), Sapindaceae (2) e Poaceae (2), que tambem ocorrem na transicao dos biomas Cerrado-Caatinga. Os dados polinicos refletem a paleovegetacao do entorno da caverna durante o Ultimo Maximo Glacial e Holoceno, e constituem uma fonte confiavel para as investigacoes paleoecologicas, paleoambientais e paleoclimaticas.\u0000Palavras-chave: palinologia, Quaternario, paleovegetacao, Cerrado.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2020-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45416120","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 new short-snouted rhinesuchid from the Permian of southern Brazil","authors":"E. V. Dias, Sérgio Dias-da-Silva, C. Schultz","doi":"10.4072/rbp.2020.2.03","DOIUrl":"https://doi.org/10.4072/rbp.2020.2.03","url":null,"abstract":"A new basal stereospondyl taxon from the Permian is described. The material used to erect the new taxon consists of a series of mandibles and some postcranial elements. A single badly preserved short-snouted skull is considered as referred material. Rastosuchus hammeri gen. et sp. nov. presents conical teeth along all coronoid bones, the prearticular extending anteriorly at the level of the precoronoid and enlarged anterior meckelian foramina. Based on the referred material, R. hammeri gen. et sp. nov. also presents posterior premaxillary teeth larger than anterior ones, the cultriform process of the parasphenoid compressed laterally forming a medial ventral keel, posterolateral ramus of the vomer extends posterior to the palatine tusks, and rounded orbit with flat orbital bones at the same level of the skull roof, features shared with Australerpeton cosgriffi and other rhinesuchids. Australerpeton cosgriffi and Rastosuchus hammeri gen. et sp. nov. are from the upper layers of the Rio do Rasto Formation (Parana Basin) in the Parana State, southern Brazil, and its deposition in freshwater continental environments is reinforced by the presence of temnospodyls amphibians.\u0000Keywords: Rhinesuchidae, Temnospondyli, Rastosuchus, Guadalupian–Lopingian, Rio do Rasto Formation.\u0000Um novo taxon de estereospondilo basal brasileiro e descrito para o Permiano. O material utilizado para propor o novo taxon consiste em uma serie de mandibulas e alguns elementos pos-cranianos. Um unico crânio mal preservado, de rostro curto, e considerado como material referido. Rastosuchus hammeri gen. et sp. nov. apresenta dentes conicos ao longo de todos os ossos coronoides, pre-articular se estendendo anteriormente ate o nivel do pre-coronoide e amplos foramens meckelianos anteriores. Baseado no material referido, R. hammeri gen. et sp. nov. tambem apresenta dentes pre-maxilares posteriores maiores que os anteriores, o processo cultriforme do paraesfenoide comprimidolateralmente formando um quilha ventral medial, ramo posterolateral do vomer estendendo-se posteriormente as presas do palatino, e orbita arredondada com ossos orbitais achatados e no mesmo nivel do teto do crânio, caracteristicas compartilhadas com Australerpeton cosgriffi e outros rinessuquideos. Australerpeton cosgriffi e Rastosuchus hammeri gen. et sp. nov. sao provenientes das camadas superiores da Formacao Rio do Rasto (Bacia do Parana) no Estado do Parana, sul do Brasil, e a presenca de anfibios temnospondilos reforca a interpretacao de que esta foi depositada em ambientes continentais dulciaquicolas.\u0000Palavras-chave: Rhinesuchidae, Temnospondyli, Rastosuchus, Guadalupiano–Lopingiano, Formacao Rio do Rasto.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2020-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43757017","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":"Late Cretaceous ostracods from the central area of the Potiguar Basin, Northeastern Brazil","authors":"E. Piovesan, G. Fauth, C. T. Bergue","doi":"10.4072/rbp.2020.2.01","DOIUrl":"https://doi.org/10.4072/rbp.2020.2.01","url":null,"abstract":"The Jandaira Formation samples collected in the central region of the Potiguar Basin show a diverse Late Cretaceous ostracod fauna. The genera Cytherella, Bairdoppilata, Triebelina, Paracypris, Fossocytheridea, Ovocytheridea, Perissocytheridea, Protocosta, Soudanella, and Leguminocythereis indicate a marginal marine environment during the Santonian–Campanian. The analyzed material demonstrates that ostracods are significant indicators of changes in the depositional environment and paleoecological markers in marginal marine environments.\u0000Key words: taxonomy, Upper Cretaceous, paleoecology, neritic assemblages.\u0000As amostras provenientes da Formacao Jandaira, coletadas na regiao central da Bacia Potiguar, evidenciam uma diversificada fauna de ostracodes do Neocretaceo. Os generos Cytherella, Bairdoppilata, Triebelina, Paracypris, Fossocytheridea, Ovocytheridea, Perissocytheridea, Protocosta, Soudanella e Leguminocythereis indicam um ambiente marinho marginal no intervalo Santoniano–Campaniano. O material analisado demonstra que os ostracodes sao indicadores significativos de modificacoes no ambiente deposicional e marcadores paleoecologicos em ambientes marinhos marginais.\u0000Palavras-chave: taxonomia, Cretaceo Superior, paleoecologia, assembleias neriticas.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2020-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47276065","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":"Isotopic paleoecology (δ13C, δ18O) of a late Pleistocene vertebrate community from the Brazilian Intertropical Region","authors":"M. Dantas, A. Cherkinsky, C. M. B. Lessa, Luciano Vilaboim Santos, M. Cozzuol, Érica Cavalcante Omena, Jorge Luiz Lopes da Silva, A. Sial, H. Bocherens","doi":"10.4072/rbp.2020.2.05","DOIUrl":"https://doi.org/10.4072/rbp.2020.2.05","url":null,"abstract":"Isotopes are one of the best tools to reconstruct the paleoecology of extinct taxa, allowing us to evaluate their diet (through carbon; C3 and C4 plants), their niche breadth (BA) and the environment in which they lived. In the present work we go deeper in the use of isotopes, and explore a mathematical mixing model with the stable isotopic composition of one (carbon) and two elements (carbon and oxygen) to evaluate (i) the relative contributions of three types of food resources (leaves, fruits and C4 grass) for meso- and megaherbivores (body mass > 100 kg) that lived during the late Pleistocene in Sergipe, Brasil, and (ii) which of these herbivores (together with some faunivorous taxa) could be potential preys for Smilodon populator and Caiman latirostris. Finally, we reconstructed the paleoenvironment in which the vertebrate community of Sergipe lived and concluded that the environment of Sergipe was a closer and drier landscape than African savannah nowadays, at least between 27 ka to 11 ka.\u0000Keywords: Quaternary, mammals, paleoecology, South America, stable isotopes.\u0000Isotopos sao uma das melhores ferramentas para reconstruir a Paleoecologia de taxons extintos, permitindo sugerir dieta (por meio do carbono, plantas C3 e C4), o nicho ecologico (BA) e ambiente em que viveram. No presente artigo nos aprofundamos no uso dos isotopos, e exploramos um modelo matematico misto com um isotopo (carbono) e dois isotopos (carbono e oxigenio) (i) para sugerir tres recursos tipos de recursos alimentares (folhas, frutas e gramineas C4) para meso-megaherbivoros (massa corporal acima de 100 kg) que viveram no Pleistoceno final de Sergipe, Brasil, e (ii) qual desses herbivoros (juntamente com faunivoros) foram presas potenciais de Smilodon populator e Caiman latirostris. Por fim, reconstruimos o paleoambiente na qual a comunidade de vertebrados de Sergipe viveu, concluindo que eramais fechada e seca do que as savanas da Africa atualmente, pelo menos entre 27 mil a 11 mil anos atras.\u0000Palavras-chave: Quaternario, paleoecologia, America do Sul, isotopos estaveis.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2020-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45381318","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":"Turonian microfossil assemblage of the Eagle Ford Formation from the La Bolita locality, Coahuila, Northwest Mexico","authors":"Blenda Esmeralda Flores-Cadenas, Alejandro Monier-Castillo, I. López-Palomino, B. Ferré, Arturo Palma-Ramírez, Julio Reyes Romo-Ramírez, Carlos Rene Muñoz-Jaramillo, Diana Contreras-Cruz","doi":"10.4072/rbp.2019.3.01","DOIUrl":"https://doi.org/10.4072/rbp.2019.3.01","url":null,"abstract":"Late Cretaceous carbonate rocks of the Eagle Ford Formation are widely distributed in north-western Mexico (Nuevo Leon, Coahuila, Chihuahua) and southern USA (Texas). Around the La Bolita locality, Castanos town (Coahuila State), this unit consists of approximately 31 m of marine deposits, characterized by thin-bedded, slightly clayey limestones. Within the scope of a microfacial analysis, 20 hand samples were collected from selected limestone levels. Identified microfossil remains are mostly represented by planktonic foraminifers, among which: Planoheterohelix moremani, P. reussi, P. globulosa, Globigerinelloides bollii, Globigerinelloides spp., Muricohedbergella delrioensis, M. planispira, Muricohedbergella spp., Whiteinella archaeocretacea, W. aprica, W. baltica, W. brittonensis, W. inornata, W. paradubia, Whiteinella spp., Clavihedbergella moremani, C. simplex, Marginotruncana renzi, M. sigali, M. schneegansi, M. pseudolinneiana, Marginotruncana spp., Praeglobotruncana algeriana, and Dicarinella canaliculata. There are also abundant calcispheres, such as Risserella rablingae, Pithonella ovalis, and Calcisphaerula innominata; as well as roveacrinoid ossicles (genus Roveacrinus), and unidentified radiolarians. Based on the stratigraphic range of both the genus Marginotruncana and the species Praeglobotruncana algeriana, an early–middle Turonian age is assigned to the studied section. The pelagic microfossil assemblage and the lithological features all suggest deposition of the studied sediments in an open marine platform, with poorly oxygenated, nutrient-rich waters.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2020-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41478290","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":"Fósseis em uma frente de extração de mármore? Análises tafonômica e paleoicnológica de mamíferos de grande porte do Quaternário do Espírito Santo, Brasil","authors":"Rodrigo Ventura Germano, Richard Buchmann, T. Rodrigues","doi":"10.4072/rbp.2019.3.06","DOIUrl":"https://doi.org/10.4072/rbp.2019.3.06","url":null,"abstract":"The occurrence of fossil mammals in the State of Espirito Santo is rare, with only two records, both reported to sediments localized within marble quarries in the district of Itaoca, in the Municipality of Cachoeiro de Itapemirim. The first record dates from 1978, when fossils of Eremotherium and gomphotheres were collected together with other vertebrate fossils and posteriorly described. The second dates from 1983, with the description of fossils of Eremotherium in an abstract. Part of this latter finding is housed at the Federal University of Espirito Santo (UFES) and represents the only fossil mammals from the State that are currently available for study. It comprises15 specimens, including cranial and post-cranial material. From these, eight can be referred to Eremotherium, one to Toxodontinae, one to Notiomastodon, and the others to large-bodied mammals. Fossils of Eremotherium and of indeterminate mammals are compatible with the presence of one giant ground sloth individual. Taphonomic and paleoichnological analyses of this supposed individual show that after death carnivores scavenged the carcass and that the bones were exposed to weathering for a relatively short time until they were transported by a hydraulic flow to a crevice, thus explaining the unusual finding of fossils in this particular outcrop.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2020-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43134794","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":"Anatomical review o Eira Barbara (Carnivora, Mustelidae) from the Quaternary of Southwestern Brazilian Amazonia","authors":"Paulo Ricardo Mendonça Lopes, M. Castro, E. Guilherme, A. S. Hsiou","doi":"10.4072/rbp.2019.3.04","DOIUrl":"https://doi.org/10.4072/rbp.2019.3.04","url":null,"abstract":"Most species of mustelids currently found in South America descend from North American immigrants that arrived during the Great American Biotic Interchange, following the rise of the Isthmus of Panama. However, previous works indicate that the genus Eira arrived in South America before this event, through an island bridge in Central America. The tayra Eira barbara (Mustelidae, Carnivora), the only species of the genus, currently has a wide geographic distribution, from Mexico to northern Argentina. Here, we redescribe a fossil of E. barbara collected close to the Municipality of Marechal Thaumaturgo, Acre State, Brazil. The southwestern Brazilian Amazonia is mostly characterized by the older sediments of Solimoes Formation (Neogene deposits), although on the riverbanks of the Upper Jurua River a typical Quaternary vertebrate fauna is also found, mainly represented by fossil mammals. The specimen UFAC PV-36 is a right hemimandible with the p4 preserved in situ, and it was compared to fossil and extant specimens of E. barbara, as well as with other carnivorans. The review of the fossil record shows that this taxon is restricted to the Quaternary of Brazil, in the states of Bahia, Minas Gerais and Acre, and of Argentina, in the Entre Rios Province. In this way, our study contributes to a better understanding of the origin and distribution of the genus in the Quaternary of South America.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2020-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42486283","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 Late Pleistocene fossil stork (Ciconiiformes: Ciconiidae) from the Santa Vitória Formation, Southern Brazil and its paleoenvironmental significance","authors":"R. P. Lopes, J. Pereira, Jorge Ferigolo","doi":"10.4072/rbp.2019.3.03","DOIUrl":"https://doi.org/10.4072/rbp.2019.3.03","url":null,"abstract":"The avian fossil record of southern Brazil is scarce, consisting of few isolated remains. Here is described a ciconiid fossil from the assemblage of mammalian remains of the Santa Vitoria Formation (SVF). The specimen is a cervical vertebra morphologically similar to Ciconia maguari (maguari stork), common in southern Brazil today. Nevertheless, its larger dimensions suggest that it could be either a morphotype of that species or another, extinct species. The taphonomic modifications of the vertebra result of a combination of autogenic and allogenic factors including the aquatic habit, shape and transportation by flowing water and burial in a shallow stream. The fossil-bearing sediment dated by luminescence was deposited during the late Pleistocene, at 37.9 ka b2k, and exhibits physical features indicating deposition under variable discharge and seasonal oscillations of the water table. The presence of an aquatic bird in these sediments indicates a period of increased precipitation, chronocorrelated to one of the millenial-scale warming pulses recorded in ice cores from Antarctica (Antarctic Isotope Maxima) that characterized the interstadial MIS 3. On the other hand, the dry and cold climate of the following glacial MIS 2 may have forced ciconiids and aquatic mammals to retreat to suitable areas (refugia), as indicated by their absence in the loess deposits (Cordao Formation) overlying the SVF, until returning during the Holocene when climate became wet and warm again. The results presented here increase the avian fossil record of southern Brazil and help understand the role of climate change on the distribution of ciconiid birds and other taxa during the Quaternary in southern South America.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":null,"pages":null},"PeriodicalIF":0.7,"publicationDate":"2020-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45136217","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}