Daisy Alves Oliva, Juliane Marques-de-Souza, R. Iannuzzi, Fábio Luiz Wankler
Clayey intraclasts containing leaves preserved as impressions and compressions were collected from the Takutu River channel in the State of Roraima, Brazil. In the present study, 23 leaf fragments are described (morphologically and anatomically) and their taxonomic identity is proposed. These fossiliferous intraclasts were suggested in previous studies as coming from the Boa Vista Formation (Upper Pleistocene–Holocene). With the aim of finding new evidence to support this correlation, X-ray diffractometry (XRD) and Laser induced-breakdown spectroscopy (LIBS) analysis were performed, comparing the fossiliferous sample with two outcrops from the Boa Vista Formation. The results evidenced the chemical and mineralogical similarity between the fossiliferous intraclasts and both outcrops, suggesting their correlation with the Boa Vista Formation. Taxonomically, the specimens were recognized as fossil representatives of Dilleniaceae Salisb., Byrsonima Rich. ex Kunth (Malpighiaceae), Zanthoxylum L. (Rutaceae), and other six morphotypes. These taxa represent typical elements of the savanna (lavrados) of Roraima. The anatomical-cutillary characters of the mummified leaves indicate the dominance of xeromorphic plants, similar to the predominant woody species in the “lavrado” today, thus suggesting the same climatic-environmental conditions. Keywords: fossil leaves, leaf architecture, cuticular anatomy, angiosperm, Cenozoic.
{"title":"First record of plant macrofossil from the Boa Vista Formation, Takutu Basin, Roraima State, Brazil","authors":"Daisy Alves Oliva, Juliane Marques-de-Souza, R. Iannuzzi, Fábio Luiz Wankler","doi":"10.4072/rbp.2022.4.05","DOIUrl":"https://doi.org/10.4072/rbp.2022.4.05","url":null,"abstract":"Clayey intraclasts containing leaves preserved as impressions and compressions were collected from the Takutu River channel in the State of Roraima, Brazil. In the present study, 23 leaf fragments are described (morphologically and anatomically) and their taxonomic identity is proposed. These fossiliferous intraclasts were suggested in previous studies as coming from the Boa Vista Formation (Upper Pleistocene–Holocene). With the aim of finding new evidence to support this correlation, X-ray diffractometry (XRD) and Laser induced-breakdown spectroscopy (LIBS) analysis were performed, comparing the fossiliferous sample with two outcrops from the Boa Vista Formation. The results evidenced the chemical and mineralogical similarity between the fossiliferous intraclasts and both outcrops, suggesting their correlation with the Boa Vista Formation. Taxonomically, the specimens were recognized as fossil representatives of Dilleniaceae Salisb., Byrsonima Rich. ex Kunth (Malpighiaceae), Zanthoxylum L. (Rutaceae), and other six morphotypes. These taxa represent typical elements of the savanna (lavrados) of Roraima. The anatomical-cutillary characters of the mummified leaves indicate the dominance of xeromorphic plants, similar to the predominant woody species in the “lavrado” today, thus suggesting the same climatic-environmental conditions. Keywords: fossil leaves, leaf architecture, cuticular anatomy, angiosperm, Cenozoic.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43714407","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}
Riadh Aouissi, Sihem Salmi-Laouar, G. E. El Qot, El Sayed M. Moneer
In the Batna Mountains, the Cenomanian Marnes de Smail Formation yield fossiliferous deposits mostly dominated by bivalves. Thirty-five bivalve species were identified, belonging to nine orders, 19 families and 26 genera. Five of them are mentioned for the first time from the Cenomanian of the study area (i.e., Nucula ? cf. margaritifera Douvillé, Barbatia (Barbatia) aegyptiaca Fourtau, Cucullaea trigona Seguenza, Arctica inornata d’Orbigny, and A. cordata Sharpe). Their distribution provided interesting insights on the marine paleoenvironment of the Cenomanian times. The paleobiogeographic distribution of the studied bivalves corresponds to the Tethys Realm. Keywords: Bivalvia, Cretaceous, Cenomanian, Algeria, Batna, Tethys
在Batna山脉，Cenomanian Marnes de Smail组产生以双壳类为主的化石矿床。共鉴定出双壳类35种，隶属于9目19科26属。其中5个是首次在研究区Cenomanian(即Nucula ?cf. margaritifera douvill，巴巴蒂亚(巴巴蒂亚)，埃及(Fourtau)， Cucullaea trigona Seguenza, Arctica inornata d 'Orbigny和A. cordata Sharpe)。它们的分布为研究塞诺曼尼亚时代的海洋古环境提供了有趣的见解。所研究的双壳类的古生物地理分布符合特提斯界。关键词:双壳维亚，白垩纪，塞诺曼尼亚，阿尔及利亚，巴特那，特提斯
{"title":"Cenomanian bivalves from Batna Mountains (Saharan Atlas, NE Algeria)","authors":"Riadh Aouissi, Sihem Salmi-Laouar, G. E. El Qot, El Sayed M. Moneer","doi":"10.4072/rbp.2022.4.02","DOIUrl":"https://doi.org/10.4072/rbp.2022.4.02","url":null,"abstract":"In the Batna Mountains, the Cenomanian Marnes de Smail Formation yield fossiliferous deposits mostly dominated by bivalves. Thirty-five bivalve species were identified, belonging to nine orders, 19 families and 26 genera. Five of them are mentioned for the first time from the Cenomanian of the study area (i.e., Nucula ? cf. margaritifera Douvillé, Barbatia (Barbatia) aegyptiaca Fourtau, Cucullaea trigona Seguenza, Arctica inornata d’Orbigny, and A. cordata Sharpe). Their distribution provided interesting insights on the marine paleoenvironment of the Cenomanian times. The paleobiogeographic distribution of the studied bivalves corresponds to the Tethys Realm. Keywords: Bivalvia, Cretaceous, Cenomanian, Algeria, Batna, Tethys","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41425677","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}
C. T. Bergue, R. P. Lopes, F. Caron, M. Ritter, F. Rodrigues
A micropaleontological analysis on 15 beachrock samples from the Northern sector of Rio Grande do Sul Coastal Plain (RSCP ), southern Brazil , revealed a relatively diverse and well-preserved ostracod assemblage composed of 16 species , including Cyprideis multidentata Hartmann, Callistocythere nucleoperiscum Whatley et al., Cytheretta punctata Sanguinetti, Caudites ohmerti Coimbra & Ornellas , and Argenticytheretta levipunctata Sanguinetti et al. Eleven ostracod species are left in open nomenclature or tentatively identified . Besides ostracods , some foraminifers , echinoderm spines, and fish remains (teeth) were also recovered ; however , the scarcity of specimens or poor preservation precluded identification at species level. Based on the Ostracoda taxonomic composition it is proposed that the beachrocks characterize environmentally condensed assemblages . This preliminary study reveals the importance and potentiality of micropaleontology for understanding the processes involved in the formation of beachrocks. Keywords: Pelotas Basin, Quaternary, coastal environments, micropaleontology, taphonomy.
通过对巴西南部里约热内卢Grande do Sul Coastal Plain (RSCP)北段15个滩岩样品的微古生物分析，发现了一个较为多样化且保存较好的壳形类组合，包括Cyprideis multidentata Hartmann、Callistocythere nucleoperiscum Whatley等、Cytheretta punctata Sanguinetti、Caudites ohmerti Coimbra & Ornellas和阿根廷人(Argenticytheretta levipunctata Sanguinetti等16种。11种介形虫仍处于公开命名或初步鉴定中。除了介形虫外，还发现了一些有孔虫、棘皮动物的刺和鱼的遗骸(牙齿);然而，标本稀缺或保存不良阻碍了在物种水平上的鉴定。根据介形纲的分类组成，认为滩岩具有环境凝聚组合的特征。这一初步研究揭示了微古生物学对了解滩岩形成过程的重要性和潜力。关键词:佩洛塔斯盆地，第四纪，海岸环境，微古生物学，地层学
{"title":"Paleoecological characterization of ostracods in beachrocks from the Northern sector of the Rio Grande do Sul Coastal Plain, Brazil","authors":"C. T. Bergue, R. P. Lopes, F. Caron, M. Ritter, F. Rodrigues","doi":"10.4072/rbp.2022.4.04","DOIUrl":"https://doi.org/10.4072/rbp.2022.4.04","url":null,"abstract":"A micropaleontological analysis on 15 beachrock samples from the Northern sector of Rio Grande do Sul Coastal Plain (RSCP ), southern Brazil , revealed a relatively diverse and well-preserved ostracod assemblage composed of 16 species , including Cyprideis multidentata Hartmann, Callistocythere nucleoperiscum Whatley et al., Cytheretta punctata Sanguinetti, Caudites ohmerti Coimbra & Ornellas , and Argenticytheretta levipunctata Sanguinetti et al. Eleven ostracod species are left in open nomenclature or tentatively identified . Besides ostracods , some foraminifers , echinoderm spines, and fish remains (teeth) were also recovered ; however , the scarcity of specimens or poor preservation precluded identification at species level. Based on the Ostracoda taxonomic composition it is proposed that the beachrocks characterize environmentally condensed assemblages . This preliminary study reveals the importance and potentiality of micropaleontology for understanding the processes involved in the formation of beachrocks. Keywords: Pelotas Basin, Quaternary, coastal environments, micropaleontology, taphonomy.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43590751","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}
H. Francischini, Gabriel S. Sipp, André Barcelos-Silveira, C. Schultz, P. Dentzien‐Dias
Mammalian lineage is deep rooted in Mesozoic, with several taxa and ichnotaxa described worldwide. One of the most prolific mammaliaform ichnospecies is Brasilichnium elusivum, which is extremely abundant in the Lower Cretaceous Botucatu Formation of the Brazilian Paraná Basin, as well as in other Mesozoic ichnofaunas of North America and Africa. In this contribution, we revisited the proposed southernmost occurrence of B. elusivum using both classical and photogrammetric (3D digitization) approaches. The flagstone containing the studied material was found ex situ, in a sidewalk at Santa Cruz do Sul Municipality (the Rio Grande do Sul State, Brazil), and the results of the performed analysis showed that the tracks cannot be assigned to any ichnotaxon. Lastly, some significant issues related to ichnological research of ex situ track-bearing flagstones and large eolian deposits are discussed. Keywords: Early Cretaceous, Botucatu Formation, mesozoic mammals, South America, vertebrate ichnology.
{"title":"Revisiting the southernmost occurrence of Brasilichnium elusivum Leonardi, 1981 with comments on the tetrapod track record of eolian environments","authors":"H. Francischini, Gabriel S. Sipp, André Barcelos-Silveira, C. Schultz, P. Dentzien‐Dias","doi":"10.4072/rbp.2022.4.01","DOIUrl":"https://doi.org/10.4072/rbp.2022.4.01","url":null,"abstract":"Mammalian lineage is deep rooted in Mesozoic, with several taxa and ichnotaxa described worldwide. One of the most prolific mammaliaform ichnospecies is Brasilichnium elusivum, which is extremely abundant in the Lower Cretaceous Botucatu Formation of the Brazilian Paraná Basin, as well as in other Mesozoic ichnofaunas of North America and Africa. In this contribution, we revisited the proposed southernmost occurrence of B. elusivum using both classical and photogrammetric (3D digitization) approaches. The flagstone containing the studied material was found ex situ, in a sidewalk at Santa Cruz do Sul Municipality (the Rio Grande do Sul State, Brazil), and the results of the performed analysis showed that the tracks cannot be assigned to any ichnotaxon. Lastly, some significant issues related to ichnological research of ex situ track-bearing flagstones and large eolian deposits are discussed. Keywords: Early Cretaceous, Botucatu Formation, mesozoic mammals, South America, vertebrate ichnology.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48880932","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}
Caroline Audi, Douglas Meyer, Tan Tjui Yeuw, Kleber Barrionuevo Baraldo, Jesica Daniela Fey, Natalie Fernandes Spanghero, Marcelo Schereiber Munhoz, Bruno Júlio de Oliveira, F. Buchmann
Photogrammetry of an excavated ichnofossil by giant sloths (Megaichnus major). During the Pliocene and Pleistocene, the extinct giant mammals that lived in South America had the burrowing behavior that, in the search for shelter and refuge, produced large ichnofossils called Megaichnus (paleoburrows). Megaichnus are biogenic structures in the form of tunnels and halls excavated by Folivora (Megaichnus major) and Cingulata (Megaichnus minor). On the ceiling and walls of these paleoburrows, it is possible to observe traces of excavation of these animals. Photogrammetry was performed by imaging M. major to generate the Three-Dimensional Digital Model (3DM). The paleoburrow is located in the Municipality of Doutor Pedrinho (Santa Catarina State) and was excavated in the sandstone of the Taciba Formation (Permian). The photographs were processed to generate the 3DM and the virtual reality interface with 3D glasses. The 3DMs are available for viewing on the Sketchfab website through the links (GoPro 4; https://skfb.ly/6RYyn) and (Nikon D60; https://skfb.ly/ooprJ). 3DM allows easy access to the ichnofossils, making it possible to study them remotely from anywhere in the world. The construction of 3DMs of the paleoburrows, through high-resolution photogrammetry, is an innovative proposal, and allows wide dissemination of knowledge about these structures. Keywords: paleoburrows, Quaternary, megafauna, 3D imaging.
{"title":"Fotogrametria de um icnofóssil escavado por preguiças-gigantes (Megaichnus major)","authors":"Caroline Audi, Douglas Meyer, Tan Tjui Yeuw, Kleber Barrionuevo Baraldo, Jesica Daniela Fey, Natalie Fernandes Spanghero, Marcelo Schereiber Munhoz, Bruno Júlio de Oliveira, F. Buchmann","doi":"10.4072/rbp.2022.3.04","DOIUrl":"https://doi.org/10.4072/rbp.2022.3.04","url":null,"abstract":"Photogrammetry of an excavated ichnofossil by giant sloths (Megaichnus major). During the Pliocene and Pleistocene, the extinct giant mammals that lived in South America had the burrowing behavior that, in the search for shelter and refuge, produced large ichnofossils called Megaichnus (paleoburrows). Megaichnus are biogenic structures in the form of tunnels and halls excavated by Folivora (Megaichnus major) and Cingulata (Megaichnus minor). On the ceiling and walls of these paleoburrows, it is possible to observe traces of excavation of these animals. Photogrammetry was performed by imaging M. major to generate the Three-Dimensional Digital Model (3DM). The paleoburrow is located in the Municipality of Doutor Pedrinho (Santa Catarina State) and was excavated in the sandstone of the Taciba Formation (Permian). The photographs were processed to generate the 3DM and the virtual reality interface with 3D glasses. The 3DMs are available for viewing on the Sketchfab website through the links (GoPro 4; https://skfb.ly/6RYyn) and (Nikon D60; https://skfb.ly/ooprJ). 3DM allows easy access to the ichnofossils, making it possible to study them remotely from anywhere in the world. The construction of 3DMs of the paleoburrows, through high-resolution photogrammetry, is an innovative proposal, and allows wide dissemination of knowledge about these structures. Keywords: paleoburrows, Quaternary, megafauna, 3D imaging.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46342502","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}
The Paleogene carbonate deposits of Pabdeh and Jahrum formations are widespread from the northwest (Dashte Zari area) to the southwest of the Shahrekord region in the High Zagros Mountains of Iran and record the lateral and upward transition from open marine into the shallow water environment. The Pabdeh Formation shows a succession of open marine pelagic and hemipelagic limestone, argillaceous limestone, and argillaceous chert. It consists of planktonic wackestone, pellet-planktonic wackestone, mudstone with planktonic foraminifera, and radiolarian siliceous wackestone, which accumulated within the Zagros Foreland Basin. The planktonic foraminifers are assigned to the Late Paleocene–Late Eocene and correspond to subtropical and tropical Zones P4b–E15. The Jahrum Formation is represented by bioclast-bearing limestone and calcarenite. It consists of benthic foraminiferal wackestone, benthic foraminiferal-red algal packstone, and bioclast-intraclast packstone deposited in a shallow platform environment. The Jahrum Formation is inter-fingered in the upper part of the Pabdeh Formation and finally overlies it conformably during the Bartonian–Priabonian. Shallowing and off-lap relationships record basin shrinking, while repeated inter-fingering signals moderate tectonic subsidence. Both formations are disconformably covered by the Late Oligocene–Miocene Asmari Formation. Keywords: biostratigraphy, Pabdeh Formation, Zagros, Paleogene, Iran.
{"title":"Biostratigraphy and paleoenvironmental significance of Paleogene foraminiferal assemblages from Dashte Zari area in High Zagros, West Iran","authors":"S. Babazadeh, Dominique Cluzel","doi":"10.4072/rbp.2022.3.03","DOIUrl":"https://doi.org/10.4072/rbp.2022.3.03","url":null,"abstract":"The Paleogene carbonate deposits of Pabdeh and Jahrum formations are widespread from the northwest (Dashte Zari area) to the southwest of the Shahrekord region in the High Zagros Mountains of Iran and record the lateral and upward transition from open marine into the shallow water environment. The Pabdeh Formation shows a succession of open marine pelagic and hemipelagic limestone, argillaceous limestone, and argillaceous chert. It consists of planktonic wackestone, pellet-planktonic wackestone, mudstone with planktonic foraminifera, and radiolarian siliceous wackestone, which accumulated within the Zagros Foreland Basin. The planktonic foraminifers are assigned to the Late Paleocene–Late Eocene and correspond to subtropical and tropical Zones P4b–E15. The Jahrum Formation is represented by bioclast-bearing limestone and calcarenite. It consists of benthic foraminiferal wackestone, benthic foraminiferal-red algal packstone, and bioclast-intraclast packstone deposited in a shallow platform environment. The Jahrum Formation is inter-fingered in the upper part of the Pabdeh Formation and finally overlies it conformably during the Bartonian–Priabonian. Shallowing and off-lap relationships record basin shrinking, while repeated inter-fingering signals moderate tectonic subsidence. Both formations are disconformably covered by the Late Oligocene–Miocene Asmari Formation. Keywords: biostratigraphy, Pabdeh Formation, Zagros, Paleogene, Iran.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47705011","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}
Hamid Reza Moghadam Zadeh, I. M. Moghaddam, M. Aleali, Z. Maleki
In this research, biostratigraphy of the Taleh Zang Formation, located in northern Lorestan, SW Iran, is discussed. The benthic foraminiferal contents of the upper Paleocene successions were examined in a carbonate platform setting in the context of European standard zonation (Shallow Benthic Zones). The co-occurrence of Glomalveolina levis (Hottinger) and Miscellanea miscella (d’Archiac & Haime) characterizes Zone SBZ 4, indicating a Thanetian age. Based on biofacies analysis and faunal associations, with emphasis on benthic foraminifera and coralline red algae, tidal flat and marginal marine environment exposed to salinity fluctuations (short-term salinity fluctuations or fully marine conditions), dominated by small benthic Foraminifera (Kathina) with slightly mesotrophic conditions, are determined for the deposition of the Poshte Jangal section. The highly translucent, shallowest part of the inner shelf dominated by representatives of Miscellanea and Opertorbitolites. The biotic assemblages representing warm tropical waters with oligotrophic conditions were observed in Palganeh and Pasan sections. Keywords: Taleh Zang Formation, Paleocene, Foraminifera, Biostratigraphy, Thanetian.
本文对位于伊朗西南部Lorestan北部的Taleh Zang组进行了生物地层学研究。在欧洲标准分带(浅底栖带)的背景下，在碳酸盐岩台地环境下研究了上古新世序列的底栖有孔虫含量。sbz4带主要为Glomalveolina levis (Hottinger)和Miscellanea miscella (d’archiac & Haime)的共生，显示了一个Thanetian时代。以底栖有孔虫和珊瑚红藻为重点，通过生物相分析和区系关联，确定了Poshte Jangal剖面沉积的潮滩和边缘海洋环境(短期盐度波动或完全海洋环境)，以小型底栖有孔虫(Kathina)为主，具有轻微的中营养条件。内陆架高度半透明、最浅的部分，主要是杂岩和复岩的代表。在Palganeh和Pasan剖面中观察到代表热带暖水的生物组合，具有低营养条件。关键词:塔勒藏组，古新世，有孔虫，生物地层学，Thanetian
{"title":"Stratigraphy of the Thanetian rotaliids limestone, northern Lorestan, Iran - Lorestan, SW Iran","authors":"Hamid Reza Moghadam Zadeh, I. M. Moghaddam, M. Aleali, Z. Maleki","doi":"10.4072/rbp.2022.3.02","DOIUrl":"https://doi.org/10.4072/rbp.2022.3.02","url":null,"abstract":"In this research, biostratigraphy of the Taleh Zang Formation, located in northern Lorestan, SW Iran, is discussed. The benthic foraminiferal contents of the upper Paleocene successions were examined in a carbonate platform setting in the context of European standard zonation (Shallow Benthic Zones). The co-occurrence of Glomalveolina levis (Hottinger) and Miscellanea miscella (d’Archiac & Haime) characterizes Zone SBZ 4, indicating a Thanetian age. Based on biofacies analysis and faunal associations, with emphasis on benthic foraminifera and coralline red algae, tidal flat and marginal marine environment exposed to salinity fluctuations (short-term salinity fluctuations or fully marine conditions), dominated by small benthic Foraminifera (Kathina) with slightly mesotrophic conditions, are determined for the deposition of the Poshte Jangal section. The highly translucent, shallowest part of the inner shelf dominated by representatives of Miscellanea and Opertorbitolites. The biotic assemblages representing warm tropical waters with oligotrophic conditions were observed in Palganeh and Pasan sections. Keywords: Taleh Zang Formation, Paleocene, Foraminifera, Biostratigraphy, Thanetian.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48174842","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}
Francisco Santiago, Isabela Jurigan, F. Ricardi-Branco
Paleoclimatic interpretation based on the analysis of the leaf physiognomy of two Pleistocene floras, Rio Claro Formation, São Paulo, Brazil. The Jaguariúna and Jazigo Vargem Grande do Sul fossil floras are well-preserved records of an ancestor of one of the phytophysiognomies of the Atlantic Forest, the oldest belt of tropical forest in the world. These fossil floras are associated with the Rio Claro Formation, one of the most important sedimentary records of the Pleistocene from the São Paulo State Peripheral Depression, Brazil. The main physiognomic characteristics–type of margins and leaf area – of the angiosperm leaves from these floras allowed us to carry out the reconstruction of the mean annual temperature (MAT) and the mean annual precipitation (MAP) for the moment of their deposition. The different equations used to reconstruct the MAT and the MAP are based on univariate methods known as Leaf Margin Analysis and Leaf Area Analysis. These equations indicated that the warm and humid subtropical/tropical climate under which the Jaguariúna fossil flora developed was characterized by a MAT of 22.1–22.8°C and a MAP of 566–831 mm, and also that the warm and humid subtropical climate under which the Jazigo Vargem Grande do Sul fossil flora developed was characterized by a MAT of 24.6–25.1°C and a MAP of 747–961 mm. These values indicate that, at the moment of deposition of the fossil floras of Jaguariúna and Jazigo Vargem Grande do Sul, conditions were warmer and less humid than the current ones. Therefore, it is possible to infer that these floras developed in a smaller climatic cycle, the interglacial period, during which the Rio Claro Formation was deposited. Keywords: Atlantic Forest, Pleistocene, physiognomic characteristics, angiosperm leaves, climatic cycle, interglacial period.
基于巴西圣保罗克拉罗组两个更新世植物区系叶片地貌分析的古气候解释。Jaguariúna和Jazigo Vargem Grande do Sul化石区系是保存完好的大西洋森林植物地貌之一的祖先记录，大西洋森林是世界上最古老的热带森林带。这些化石区系与里约热内卢Claro组有关，该组是巴西圣保罗州外围凹陷更新世最重要的沉积记录之一。这些植物区系被子植物叶片的边缘和叶面积的主要地貌特征，使我们得以重建其沉积时刻的年平均温度(MAT)和年均降水量(MAP)。用于重建MAT和MAP的不同方程是基于被称为叶缘分析和叶面积分析的单变量方法。结果表明，Jaguariúna化石区系发育的温暖湿润亚热带/热带气候的MAT值为22.1 ~ 22.8°C, MAP值为566 ~ 831 mm; Jazigo Vargem Grande do Sul化石区系发育的温暖湿润亚热带气候的MAT值为24.6 ~ 25.1°C, MAP值为747 ~ 961 mm。这些值表明，在Jaguariúna和Jazigo Vargem Grande do Sul化石植物群沉积的时刻，条件比现在更温暖，更少潮湿。因此，有可能推断这些植物群是在一个较小的气候循环中发育的，即间冰期，在间冰期沉积了bbb10 Claro组。关键词:大西洋森林，更新世，地貌特征，被子植物叶片，气候循环，间冰期
{"title":"Interpretação paleoclimática com base na análise da fisionomia foliar de duas floras pleistocênicas, Formação Rio Claro, São Paulo, Brasil","authors":"Francisco Santiago, Isabela Jurigan, F. Ricardi-Branco","doi":"10.4072/rbp.2022.3.05","DOIUrl":"https://doi.org/10.4072/rbp.2022.3.05","url":null,"abstract":"Paleoclimatic interpretation based on the analysis of the leaf physiognomy of two Pleistocene floras, Rio Claro Formation, São Paulo, Brazil. The Jaguariúna and Jazigo Vargem Grande do Sul fossil floras are well-preserved records of an ancestor of one of the phytophysiognomies of the Atlantic Forest, the oldest belt of tropical forest in the world. These fossil floras are associated with the Rio Claro Formation, one of the most important sedimentary records of the Pleistocene from the São Paulo State Peripheral Depression, Brazil. The main physiognomic characteristics–type of margins and leaf area – of the angiosperm leaves from these floras allowed us to carry out the reconstruction of the mean annual temperature (MAT) and the mean annual precipitation (MAP) for the moment of their deposition. The different equations used to reconstruct the MAT and the MAP are based on univariate methods known as Leaf Margin Analysis and Leaf Area Analysis. These equations indicated that the warm and humid subtropical/tropical climate under which the Jaguariúna fossil flora developed was characterized by a MAT of 22.1–22.8°C and a MAP of 566–831 mm, and also that the warm and humid subtropical climate under which the Jazigo Vargem Grande do Sul fossil flora developed was characterized by a MAT of 24.6–25.1°C and a MAP of 747–961 mm. These values indicate that, at the moment of deposition of the fossil floras of Jaguariúna and Jazigo Vargem Grande do Sul, conditions were warmer and less humid than the current ones. Therefore, it is possible to infer that these floras developed in a smaller climatic cycle, the interglacial period, during which the Rio Claro Formation was deposited. Keywords: Atlantic Forest, Pleistocene, physiognomic characteristics, angiosperm leaves, climatic cycle, interglacial period.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42149929","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}
C. Rangel, H. Francischini, S. Rodrigues, R. Netto, P. V. Buck, Daniel Sedorko
Vertebrates produce a variety of trace fossils, mostly tracks and trackways, coprolites, and burrows resulting from fossorial and subterranean habits. Burrows, particularly, tend to represent temporary or permanent shelter. Vertebrate burrows are relatively understudied in the Brazilian Mesozoic units, as well as in Cretaceous rocks worldwide. This study aims to analyze a paleoburrow in the Upper Cretaceous Adamantina Formation and to discuss its paleobiological and paleoenvironmental implications. A descriptive study was carried out on the paleoburrow morphology, following aspects such as orientation, architecture, and dimensions, and facies association analysis provided the interpretation of the paleoenvironment in which the tracemaker lived. The origin of the paleoburrow was highlighted, as well as the size of its possible producer, besides inferring the exposure time of the paleoburrow from taphonomic interpretations, which contains allochthonous bone remains. The results suggest long periods of dry conditions, as previously suggested for the much-debated Adamantina Formation, interrupted by flooding events as evidenced by facies analysis and suggested by the lungfish burrow. The possibility of a lungfish record also expands the presence of these animals to Adamantina Formation, even though more data are needed to understand the paleoecology of these formations. Keywords: lungfish, paleoburrow, floodplain, Adamantina Formation.
{"title":"A possible lungfish burrow in the Upper Cretaceous Adamantina Formation (Bauru Basin, Brazil) and its paleoecological and paleoenvironmental significance","authors":"C. Rangel, H. Francischini, S. Rodrigues, R. Netto, P. V. Buck, Daniel Sedorko","doi":"10.4072/rbp.2022.3.01","DOIUrl":"https://doi.org/10.4072/rbp.2022.3.01","url":null,"abstract":"Vertebrates produce a variety of trace fossils, mostly tracks and trackways, coprolites, and burrows resulting from fossorial and subterranean habits. Burrows, particularly, tend to represent temporary or permanent shelter. Vertebrate burrows are relatively understudied in the Brazilian Mesozoic units, as well as in Cretaceous rocks worldwide. This study aims to analyze a paleoburrow in the Upper Cretaceous Adamantina Formation and to discuss its paleobiological and paleoenvironmental implications. A descriptive study was carried out on the paleoburrow morphology, following aspects such as orientation, architecture, and dimensions, and facies association analysis provided the interpretation of the paleoenvironment in which the tracemaker lived. The origin of the paleoburrow was highlighted, as well as the size of its possible producer, besides inferring the exposure time of the paleoburrow from taphonomic interpretations, which contains allochthonous bone remains. The results suggest long periods of dry conditions, as previously suggested for the much-debated Adamantina Formation, interrupted by flooding events as evidenced by facies analysis and suggested by the lungfish burrow. The possibility of a lungfish record also expands the presence of these animals to Adamantina Formation, even though more data are needed to understand the paleoecology of these formations. Keywords: lungfish, paleoburrow, floodplain, Adamantina Formation.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43599523","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}
Luiz Antonio Letizio, R. J. Bertini, M. A. Medeiros
New evidence of putative Unenlagiinae (Deinonychosauria, Theropoda) in the São Luís-Grajaú Basin, Albian–Cenomanian, State of Maranhão, Brazil. We studied an assemblage of teeth from Laje do Coringa, São Luís-Grajaú Basin, Alcântara Formation, State of Maranhão, Brazil. The collection sites are dated as Albian–Cenomanian. Ten teeth were submitted to morphological analysis in Scanning Electron Microscopy, with the goal of identifying materials likely associated with unenlagiine theropod dinosaurs. Three specimens were identified as putative members of the group based on: (a) strong labial-lingual flattening of the crown, (b) absence of longitudinal grooves, (c) dimensions compatible with previously described Unenlagiinae, (d) “ziphodont” morphology lightly to the mesial portion, (e) basal section with two distinguishable borders, (f) complete absence of serrations. These teeth expand chronological and geographical distributions of Unenlagiinae dinosaurs. Keywords: Dinosauria, teeth, Maniraptoriformes, Cretaceous. RESUMO – O presente trabalho investiga uma associação de dentes isolados provenientes da Laje do Coringa, Bacia São Luís-Grajaú, Formação Alcântara, Estado do Maranhão, Brasil. Os locais de coleta são datados para os andares Albiano–Cenomaniano do Período Cretáceo. Dez dentes foram submetidos a análises morfológicas em Microscopia Eletrônica de Varredura, com objetivo de identificar materiais possivelmente associáveis a dinossauros terópodos unenlagiinos. Três espécimes foram identificados como possivelmente associáveis ao grupo, com base em (a) forte achatamento lábio-lingual da coroa, (b) ausência de estrias longitudinais, (c) dimensões totais dos espécimes compatíveis com as equivalentes de Unenlagiinae previamente descritos, (d) forma “zifodonte” levemente voltada para a porção mesial, (e) forma da seção basal com duas bordas distinguíveis, (f) ausência completa de serrilhas. Estes dentes ampliam distribuições cronológicas e geográficas de dinossauros Unenlagiinae. Palavras-chave: Dinosauria, dentes, Maniraptoriformes, Cretáceo.
巴西马拉尼昂州阿尔比安-塞诺曼阶São LuíS-Grajaú盆地推定Unenlaginae（Deinonychouria，兽脚亚目）的新证据。我们研究了巴西马拉尼昂州阿尔坎塔拉组São LuíS-Grajaú盆地Laje do Coringa的一组牙齿。收集地点的年代为阿尔布阶-塞诺曼阶。10颗牙齿被提交给扫描电子显微镜进行形态分析，目的是识别可能与无齿兽脚类恐龙有关的材料。三个标本被确定为该组的假定成员，基于：（a）强烈的唇舌侧牙冠扁平化，（b）没有纵向凹槽，（c）与先前描述的Unnlagiinae相兼容的尺寸，（d）“zipodont”形态轻微到近中部分，（e）具有两个可区分边界的基底部分，（f）完全没有锯齿。这些牙齿扩展了Unenlaginae恐龙的时间和地理分布。关键词：恐龙；牙齿；盗龙形目；白垩纪。摘要-这项工作调查了巴西马拉尼昂州阿尔坎塔拉组São LuíS-Grajaú盆地Laje do Coringa的孤立牙齿的关联。采集地点的年代可追溯到白垩纪的阿尔比阶-塞诺曼阶。10颗牙齿在扫描电子显微镜下进行了形态分析，以确定可能与无齿兽脚类恐龙有关的材料。三个标本被确定为可能与该组有关，基于（a）牙冠的唇舌侧扁平度强，（b）没有纵向条纹，（c）标本的总尺寸与之前描述的Unenlaginae等同物相兼容，（d）稍微面向中内侧部分，“ziphodon”形状，（e） 基部的形状，有两个可辨别的边缘，（f）完全没有锯齿。这些牙齿扩大了恐龙的时间和地理分布。关键词：恐龙，齿类，盗龙形目，白垩纪。
{"title":"Novas evidências de possíveis Unenlagiinae (Deinonychosauria, Theropoda) na Bacia São Luís-Grajaú, Albiano–Cenomaniano do Estado do Maranhão, Brasil","authors":"Luiz Antonio Letizio, R. J. Bertini, M. A. Medeiros","doi":"10.4072/rbp.2022.2.05","DOIUrl":"https://doi.org/10.4072/rbp.2022.2.05","url":null,"abstract":"New evidence of putative Unenlagiinae (Deinonychosauria, Theropoda) in the São Luís-Grajaú Basin, Albian–Cenomanian, State of Maranhão, Brazil. We studied an assemblage of teeth from Laje do Coringa, São Luís-Grajaú Basin, Alcântara Formation, State of Maranhão, Brazil. The collection sites are dated as Albian–Cenomanian. Ten teeth were submitted to morphological analysis in Scanning Electron Microscopy, with the goal of identifying materials likely associated with unenlagiine theropod dinosaurs. Three specimens were identified as putative members of the group based on: (a) strong labial-lingual flattening of the crown, (b) absence of longitudinal grooves, (c) dimensions compatible with previously described Unenlagiinae, (d) “ziphodont” morphology lightly to the mesial portion, (e) basal section with two distinguishable borders, (f) complete absence of serrations. These teeth expand chronological and geographical distributions of Unenlagiinae dinosaurs. Keywords: Dinosauria, teeth, Maniraptoriformes, Cretaceous. RESUMO – O presente trabalho investiga uma associação de dentes isolados provenientes da Laje do Coringa, Bacia São Luís-Grajaú, Formação Alcântara, Estado do Maranhão, Brasil. Os locais de coleta são datados para os andares Albiano–Cenomaniano do Período Cretáceo. Dez dentes foram submetidos a análises morfológicas em Microscopia Eletrônica de Varredura, com objetivo de identificar materiais possivelmente associáveis a dinossauros terópodos unenlagiinos. Três espécimes foram identificados como possivelmente associáveis ao grupo, com base em (a) forte achatamento lábio-lingual da coroa, (b) ausência de estrias longitudinais, (c) dimensões totais dos espécimes compatíveis com as equivalentes de Unenlagiinae previamente descritos, (d) forma “zifodonte” levemente voltada para a porção mesial, (e) forma da seção basal com duas bordas distinguíveis, (f) ausência completa de serrilhas. Estes dentes ampliam distribuições cronológicas e geográficas de dinossauros Unenlagiinae. Palavras-chave: Dinosauria, dentes, Maniraptoriformes, Cretáceo.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2022-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47714133","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}
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