The purpose of this work is to propose a new name, Ideluralia nom. nov., to the genus Bairdiella Egorova (Ostracoda), preoccupied by Bairdiella Gill (Teleostei). Keywords: nomenclature, taxonomy, Ostracoda, Devonian.
{"title":"Ideluralia nom. nov., a new name for the ostracode genus Bairdiella Egorova, 1960","authors":"L. S. Antonietto, S. Brandão","doi":"10.4072/rbp.2023.2.06","DOIUrl":"https://doi.org/10.4072/rbp.2023.2.06","url":null,"abstract":"The purpose of this work is to propose a new name, Ideluralia nom. nov., to the genus Bairdiella Egorova (Ostracoda), preoccupied by Bairdiella Gill (Teleostei). Keywords: nomenclature, taxonomy, Ostracoda, Devonian.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43798115","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}
S. S. Arcanjo, Diogo van Basten Aguiar de Sousa, M. A. Medeiros, Rafael Matos Lindoso, E. Sousa, I. S. Carvalho
This article shows the tectonic influence of the Parnaíba River Lineament located in the Parnaíba Basin through a paleontological finding of a Cretaceous age close to a Permian sequence. The studied region is in the northeast of the State of Maranhão, near the town of Duque Bacelar, in the vicinity of the lineament. A normal fault in the NNE-SSW direction was responsible for the lowering of the Itapecuru Formation strata (Cretaceous) and the relative upward movement of the Pedra de Fogo Formation (Permian). The unprecedented finding of a Mesozoic (mid-Cretaceous) theropod tooth located topographically at the same level as a Paleozoic unit represents evidence of tectonic activity affecting the stratigraphic successions of the Parnaíba Basin. Keywords: Parnaíba River Lineament, Pedra de Fogo Formation, Itapecuru Formation, Spinosauridae.
本文通过一项白垩纪接近二叠纪序列的古生物学发现，展示了位于帕尔纳伊巴盆地的帕尔纳伊巴河线的构造影响。研究区域位于Maranhão州东北部，靠近Duque Bacelar镇，靠近线性构造。NNE-SSW方向的正断层是Itapecuru组地层（白垩纪）下降和Pedra de Fogo组（二叠纪）相对上升的原因。中生代（白垩纪中期）兽脚亚目恐龙牙齿在地形上与古生代单元处于同一水平，这是前所未有的发现，这表明构造活动影响了Parnaíba盆地的地层序列。关键词：Parnaíba河水系，Pedra de Fogo组，Itapecuru组，棘龙科。
{"title":"Tectonic aspects of the Rio Parnaíba Lineament, Duque Bacelar Region, Maranhão State, based on the record of Dinosauria, Spinosaurinae","authors":"S. S. Arcanjo, Diogo van Basten Aguiar de Sousa, M. A. Medeiros, Rafael Matos Lindoso, E. Sousa, I. S. Carvalho","doi":"10.4072/rbp.2023.2.03","DOIUrl":"https://doi.org/10.4072/rbp.2023.2.03","url":null,"abstract":"This article shows the tectonic influence of the Parnaíba River Lineament located in the Parnaíba Basin through a paleontological finding of a Cretaceous age close to a Permian sequence. The studied region is in the northeast of the State of Maranhão, near the town of Duque Bacelar, in the vicinity of the lineament. A normal fault in the NNE-SSW direction was responsible for the lowering of the Itapecuru Formation strata (Cretaceous) and the relative upward movement of the Pedra de Fogo Formation (Permian). The unprecedented finding of a Mesozoic (mid-Cretaceous) theropod tooth located topographically at the same level as a Paleozoic unit represents evidence of tectonic activity affecting the stratigraphic successions of the Parnaíba Basin. Keywords: Parnaíba River Lineament, Pedra de Fogo Formation, Itapecuru Formation, Spinosauridae.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49182660","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}
M. Ghanavati, raj Maghfouri Moghaddam, M. Aleali, M. Arian
The carbonate strata of the Burdigalian Guri Member are located in the Dezful Embayment along the northern Persian Gulf shore. Ichnofabric analysis and paleoecology of the Guri Member in the Dezful Embayment are described by investigating three outcrop sections. The facies features of the Guri Member show a very shallow marine environment with high oxidation content. The Guri Member contains remarkably well-preserved specimens of Thalassinoides suevicus. It is mainly recorded as Y and T forms in the shallow water facies. Two ichnofabrics were recognized in the dominantly carbonate sedimentary succession. Ichnofabrics A, and B are interpreted as representing the tidal flat and lagoon environments respectively. Ichnofabric interpretation of the Miankuh section might be simply indicating more time to colonization in relation to the Parsi section. Keywords: ichnofabric, Miocene, Dezful Embayment, Guri Member.
{"title":"Burdigalian ichnofabric from the Guri Member, Dezful Embayment, southwestern Iran","authors":"M. Ghanavati, raj Maghfouri Moghaddam, M. Aleali, M. Arian","doi":"10.4072/rbp.2023.2.04","DOIUrl":"https://doi.org/10.4072/rbp.2023.2.04","url":null,"abstract":"The carbonate strata of the Burdigalian Guri Member are located in the Dezful Embayment along the northern Persian Gulf shore. Ichnofabric analysis and paleoecology of the Guri Member in the Dezful Embayment are described by investigating three outcrop sections. The facies features of the Guri Member show a very shallow marine environment with high oxidation content. The Guri Member contains remarkably well-preserved specimens of Thalassinoides suevicus. It is mainly recorded as Y and T forms in the shallow water facies. Two ichnofabrics were recognized in the dominantly carbonate sedimentary succession. Ichnofabrics A, and B are interpreted as representing the tidal flat and lagoon environments respectively. Ichnofabric interpretation of the Miankuh section might be simply indicating more time to colonization in relation to the Parsi section. Keywords: ichnofabric, Miocene, Dezful Embayment, Guri Member.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48515434","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}
Yasmim Araújo Silva, Geize Carolinne Correia Andrade Oliveira, Rick Souza de Oliveira, Sandro Marcelo Scheffler
Crinoidea from the Pennsylvanian deposits of the Itaituba Formation, Northern Amazonas Basin. The Itaituba Formation comprises part of the marine section of the Tapajós Group in the Amazonas Basin. This unit mainly comprises Pennsylvanian carbonate deposits associated with various marine invertebrate fossils. In this work, we present new records of crinoids in the Itaituba Formation in the Caltarém quarry, north platform of the Amazonas Basin. There are described and taxonomically identified, two genera of crinoids, through the study of columnals and pluricolumnals, in addition to the interpretation of the depositional environment through the analysis of carbonate microfacies. The identified specimens correspond to the species Cyclocaudex aff. typicus Moore & Jeffords, and to the genus Pentaridica Moore & Jeffords (first record in the Itaituba Formation). The textural, compositional, and paleontological analysis suggests four standard microfacies MPF 09, 10, 16, 23) and two faciological zones (ZF 7 E 8). The bioturbated bioclastic wackestones (MFP 09) and bioclastic wackestones/packstones (MFP 10) microfacies, with fossils of brachiopods, crinoids, echinoids, miliolid and fusulinid foraminifera, trilobites, and bryozoans, characterize an interior shelf environment, with a connection to an open marine circulation (ZF 7). The peloidal wackestones (MFP 16) and mudstones (MFP 23) microfacies, with a fossiliferous assemblage limited to brachiopods, echinoids and miliolid foraminifera, characterize a restricted lagoon environment (ZF 8). Paleontological data and microfacies analysis indicate the development of a lagoon environment with a diverse paleofauna of marine invertebrates in the carbonate platform of the northern bord of the Amazonas Basin, in the Monte Alegre County, during the Pennsylvanian. Keywords: taxonomy, echinoderms, microfacies, paleoenvironment, Pennsylvanian.
{"title":"Nova ocorrência de Crinoidea no Pensilvaniano da Formação Itaituba, Pedreira Caltarém, norte da Bacia do Amazonas","authors":"Yasmim Araújo Silva, Geize Carolinne Correia Andrade Oliveira, Rick Souza de Oliveira, Sandro Marcelo Scheffler","doi":"10.4072/rbp.2023.1.03","DOIUrl":"https://doi.org/10.4072/rbp.2023.1.03","url":null,"abstract":"Crinoidea from the Pennsylvanian deposits of the Itaituba Formation, Northern Amazonas Basin. The Itaituba Formation comprises part of the marine section of the Tapajós Group in the Amazonas Basin. This unit mainly comprises Pennsylvanian carbonate deposits associated with various marine invertebrate fossils. In this work, we present new records of crinoids in the Itaituba Formation in the Caltarém quarry, north platform of the Amazonas Basin. There are described and taxonomically identified, two genera of crinoids, through the study of columnals and pluricolumnals, in addition to the interpretation of the depositional environment through the analysis of carbonate microfacies. The identified specimens correspond to the species Cyclocaudex aff. typicus Moore & Jeffords, and to the genus Pentaridica Moore & Jeffords (first record in the Itaituba Formation). The textural, compositional, and paleontological analysis suggests four standard microfacies MPF 09, 10, 16, 23) and two faciological zones (ZF 7 E 8). The bioturbated bioclastic wackestones (MFP 09) and bioclastic wackestones/packstones (MFP 10) microfacies, with fossils of brachiopods, crinoids, echinoids, miliolid and fusulinid foraminifera, trilobites, and bryozoans, characterize an interior shelf environment, with a connection to an open marine circulation (ZF 7). The peloidal wackestones (MFP 16) and mudstones (MFP 23) microfacies, with a fossiliferous assemblage limited to brachiopods, echinoids and miliolid foraminifera, characterize a restricted lagoon environment (ZF 8). Paleontological data and microfacies analysis indicate the development of a lagoon environment with a diverse paleofauna of marine invertebrates in the carbonate platform of the northern bord of the Amazonas Basin, in the Monte Alegre County, during the Pennsylvanian. Keywords: taxonomy, echinoderms, microfacies, paleoenvironment, Pennsylvanian.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43223302","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 first occurrence of the problematic cnidarians Sphenothallus Hall (S. sp. 1 and S. sp. 2) is described from upper Viséan and ?Bashkirian (Carboniferous) black shales of the Dnipro-Donets Depression in NE Ukraine. Carboniferous Sphenothallus spp. from the Dnipro-Donets Depression apparently led an epifaunal gregarious lifestyle, preferring paleobasin areas with slow sedimentation rates, low current energy, and dysaerobic environments, as already suggested by literature data. The discovery of representatives of the genus Sphenothallus in Carboniferous strata of Ukraine significantly extends our knowledge about the geographic distribution of these animals. Further, it confirms their preference for environments with slow sedimentation. Keywords: cnidarians, Sphenothallus, Carboniferous, Dnipro-Donets Depression, Ukraine.
问题刺胞虫Sphenothallus Hall (S. sp. 1和S. sp. 2)的首次出现是在乌克兰东北部第聂伯-顿涅茨凹陷石炭系vissaman上部和Bashkirian下部黑色页岩中发现的。来自第聂伯-顿涅茨凹陷的石炭纪sphenthallus似乎过着一种脚外群居的生活方式，更喜欢沉积速率慢、电流能量低、缺氧环境的古盆地地区，正如文献数据所表明的那样。在乌克兰石炭纪地层中发现的蝶属代表，极大地扩展了我们对这些动物地理分布的认识。进一步证实了它们对缓慢沉积环境的偏好。关键词:刺胞动物，石炭纪，石炭纪，第聂伯-顿涅茨大萧条，乌克兰
{"title":"First occurrence of the genus Sphenothallus Hall, 1847 (Cnidaria) in the Carboniferous of the Dnipro-Donets Depression, Ukraine","authors":"V. Dernov","doi":"10.4072/rbp.2023.1.02","DOIUrl":"https://doi.org/10.4072/rbp.2023.1.02","url":null,"abstract":"The first occurrence of the problematic cnidarians Sphenothallus Hall (S. sp. 1 and S. sp. 2) is described from upper Viséan and ?Bashkirian (Carboniferous) black shales of the Dnipro-Donets Depression in NE Ukraine. Carboniferous Sphenothallus spp. from the Dnipro-Donets Depression apparently led an epifaunal gregarious lifestyle, preferring paleobasin areas with slow sedimentation rates, low current energy, and dysaerobic environments, as already suggested by literature data. The discovery of representatives of the genus Sphenothallus in Carboniferous strata of Ukraine significantly extends our knowledge about the geographic distribution of these animals. Further, it confirms their preference for environments with slow sedimentation. Keywords: cnidarians, Sphenothallus, Carboniferous, Dnipro-Donets Depression, Ukraine.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46364184","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}
Mariana Cirino, V. G. Pitana, F. R. Negri, Cástor Cartelle, Jorge Ferigolo, A. M. Ribeiro
Diagnoses of Mylodontidae species are generally based on skull, mandibular, and tooth characteristics, and rarely on postcranial morphology, due to the lack of postcranial material associated with the cranial material. The studies of postcranial anatomy have generally a biomechanical focus and reflect a set of functions of skeletal structures, but their interpretation in phylogenetic analysis is still limited. In Pleistocene deposits of Rio Grande do Sul State, Brazil, an important set of postcranial specimens was collected, belonging to Mylodontidae. They were morphologically and morphometrically analyzed, allowing us to observe some diagnostic characters such as the humeral entepicondylar foramen and crests, shape of the radial shaft, angle of distal articulation of the tibia, as well as the angle of proximal articulation of the astragalus. The material was also compared with specimens from other South American localities. Most of the remains were assigned to Glossotherium robustum and Lestodon armatus. In addition, a new Scelidotheriinae was recorded for Rio Grande do Sul State. The study indicated significant differences in the postcranial morphology, which allowed the recognition of some specific diagnostic characters. Keywords: Mylodontinae, Scelidotheriinae, hindlimb, forelimb, Pleistocene, Rio Grande do Sul.
髓齿科的诊断通常基于头骨、下颌和牙齿特征，很少基于颅后形态学，因为缺乏与颅后材料相关的颅后材料。颅后解剖学的研究通常以生物力学为重点，反映了骨骼结构的一系列功能，但它们在系统发育分析中的解释仍然有限。在巴西南格兰德州里约热内卢更新世沉积层中，采集了一套重要的颅后标本，属于齿齿科。通过形态学和形态计量学的分析，我们可以观察到一些诊断特征，如肱骨髁内孔和嵴、桡骨轴的形状、胫骨远端关节角以及黄芪近端关节角。该材料还与其他南美地区的标本进行了比较。大部分遗骸归属于粗壮舌龙和长齿龙。此外，在南大州里约热内卢还发现了一种新的Scelidotheriinae。该研究表明颅后形态学有显著差异，从而可以识别一些特定的诊断特征。关键词:Mylodontinae, Scelidotheriinae，后肢，前肢，更新世，里约热内卢Grande do Sul
{"title":"New postcranial remains of ground sloths (Xenarthra, Folivora, Mylodontidae) from Southern Brazil","authors":"Mariana Cirino, V. G. Pitana, F. R. Negri, Cástor Cartelle, Jorge Ferigolo, A. M. Ribeiro","doi":"10.4072/rbp.2023.1.04","DOIUrl":"https://doi.org/10.4072/rbp.2023.1.04","url":null,"abstract":"Diagnoses of Mylodontidae species are generally based on skull, mandibular, and tooth characteristics, and rarely on postcranial morphology, due to the lack of postcranial material associated with the cranial material. The studies of postcranial anatomy have generally a biomechanical focus and reflect a set of functions of skeletal structures, but their interpretation in phylogenetic analysis is still limited. In Pleistocene deposits of Rio Grande do Sul State, Brazil, an important set of postcranial specimens was collected, belonging to Mylodontidae. They were morphologically and morphometrically analyzed, allowing us to observe some diagnostic characters such as the humeral entepicondylar foramen and crests, shape of the radial shaft, angle of distal articulation of the tibia, as well as the angle of proximal articulation of the astragalus. The material was also compared with specimens from other South American localities. Most of the remains were assigned to Glossotherium robustum and Lestodon armatus. In addition, a new Scelidotheriinae was recorded for Rio Grande do Sul State. The study indicated significant differences in the postcranial morphology, which allowed the recognition of some specific diagnostic characters. Keywords: Mylodontinae, Scelidotheriinae, hindlimb, forelimb, Pleistocene, Rio Grande do Sul.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42668124","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}
On the phylogenetic position of a particular specimen of Panochthus (Xenarthra, Glyptodontidae): an analysis based exclusively on characteristics of the dorsal carapace. The monophyly of Xenarthra is supported by morphological and molecular characters, ancient DNA and collagen. Phylogenetic work also supports the idea of a common ancestor for the Cingulata; Glyptodontidae is considered a natural group too; this also occurs with the genus Panochthus, which includes eight species. The phylogenetic relationships of a peculiar specimen UATF-V s/n, assigned to Panochthus sp. were examined through a cladistic analysis carried out exclusively with characters from the dorsal carapace. A maximum parsimony tree with L = 49, CI = 0.84 and IR = 0.74 was obtained through the analysis of a matrix of 14 taxa and 29 characters. The cladogram comprises two large groups: node A includes Nopachtus coagmentatus, N. cabrerai, Propanochthus bullifer, Phlyctaenopyga ameghini; and node B contains Glyptodon reticulatus, Hoplophorus euphractus, Neosclerocalyptus ornatus, Panochthus intermedius, P. subintermedius, P. tuberculatus, P. greslebini, P. hipsilis and UATF-V s/n. The specimen UATF-V s/n is positioned as the sister taxon of all Panochthus spp., having most plesiomorphic characters than other species of the genus. Glyptodon reticulatus appears as the sister group of Panochthus, presenting osteoderms of the mid-dorsal region with a reticular pattern. The characteristic of these osteoderms without a central figure is shared with G. reticulatus and Neuryurus trabeculatus; this feature is interpreted as an evolutionary convergence. The exclusive feature of Panochthus is that the mid-dorsal region and the anterior part of the mid-lateral region of the dorsal carapace are formed by ornate osteoderms following a reticular pattern. Keywords: Glyptodontidae, Panochthus, phylogeny, dorsal carapace, osteoderms, reticular pattern.
{"title":"Sobre la posición filogenética de un ejemplar particular de Panochthus (Xenarthra, Glyptodontidae): análisis basado exclusivamente en caracteres de la coraza dorsal","authors":"Martín Zamorano","doi":"10.4072/rbp.2023.1.05","DOIUrl":"https://doi.org/10.4072/rbp.2023.1.05","url":null,"abstract":"On the phylogenetic position of a particular specimen of Panochthus (Xenarthra, Glyptodontidae): an analysis based exclusively on characteristics of the dorsal carapace. The monophyly of Xenarthra is supported by morphological and molecular characters, ancient DNA and collagen. Phylogenetic work also supports the idea of a common ancestor for the Cingulata; Glyptodontidae is considered a natural group too; this also occurs with the genus Panochthus, which includes eight species. The phylogenetic relationships of a peculiar specimen UATF-V s/n, assigned to Panochthus sp. were examined through a cladistic analysis carried out exclusively with characters from the dorsal carapace. A maximum parsimony tree with L = 49, CI = 0.84 and IR = 0.74 was obtained through the analysis of a matrix of 14 taxa and 29 characters. The cladogram comprises two large groups: node A includes Nopachtus coagmentatus, N. cabrerai, Propanochthus bullifer, Phlyctaenopyga ameghini; and node B contains Glyptodon reticulatus, Hoplophorus euphractus, Neosclerocalyptus ornatus, Panochthus intermedius, P. subintermedius, P. tuberculatus, P. greslebini, P. hipsilis and UATF-V s/n. The specimen UATF-V s/n is positioned as the sister taxon of all Panochthus spp., having most plesiomorphic characters than other species of the genus. Glyptodon reticulatus appears as the sister group of Panochthus, presenting osteoderms of the mid-dorsal region with a reticular pattern. The characteristic of these osteoderms without a central figure is shared with G. reticulatus and Neuryurus trabeculatus; this feature is interpreted as an evolutionary convergence. The exclusive feature of Panochthus is that the mid-dorsal region and the anterior part of the mid-lateral region of the dorsal carapace are formed by ornate osteoderms following a reticular pattern. Keywords: Glyptodontidae, Panochthus, phylogeny, dorsal carapace, osteoderms, reticular pattern.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42431959","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}
Caio Bittencourt Guedes, Fernanda Siviero, S. Scheffler
Devonian conulariids (Cnidaria) from the Ponta Grossa Formation, Paraná Basin, have been studied since 1913, when the fauna composed of Paraconularia africana (Sharpe), Conularia quichua Ulric h, and Paraconularia ulrichana (Cla rke) was first described. Since then, much work has been done encompassing their taphonomy, systematics, and paleobiology. However, until now the studies have relied on conulariids from the eastern border area of the basin. Therefore, there was a lack of information on the conulariids of the northwestern border area of the Paraná Basin, particularly from the Mato Grosso do Sul, for which there are no previous descriptions of these fossils. The present analysis of specimens from the Ponta Grossa Formation in Mato Grosso do Sul revealed the presence of Conularia quichua, Paraconularia africana, P. ulrichana, and Reticulaconularia caetensis sp. nov. Therefore, the diversity of the conulariid fauna recorded from the northwest border area of the basin is greater than that of the eastern border area, where the genus Reticulaconularia has not yet been found, and the presence of Paraconularia ulrichana still needs confirmation. Furthermore, our data suggest that the Paraná Basin had narrow connections with the Devonian seas of Bolivia, at least during sea-level rise, as indicated by the shared benthic marine fauna. Keywords: Conulariids, Lower Devonian, Ponta Grossa Formation, Paraná Basin.
{"title":"Taxonomy of Devonian conulariids (Cnidaria) from Mato Grosso do Sul, Paraná Basin, Brazil","authors":"Caio Bittencourt Guedes, Fernanda Siviero, S. Scheffler","doi":"10.4072/rbp.2023.1.01","DOIUrl":"https://doi.org/10.4072/rbp.2023.1.01","url":null,"abstract":"Devonian conulariids (Cnidaria) from the Ponta Grossa Formation, Paraná Basin, have been studied since 1913, when the fauna composed of Paraconularia africana (Sharpe), Conularia quichua Ulric h, and Paraconularia ulrichana (Cla rke) was first described. Since then, much work has been done encompassing their taphonomy, systematics, and paleobiology. However, until now the studies have relied on conulariids from the eastern border area of the basin. Therefore, there was a lack of information on the conulariids of the northwestern border area of the Paraná Basin, particularly from the Mato Grosso do Sul, for which there are no previous descriptions of these fossils. The present analysis of specimens from the Ponta Grossa Formation in Mato Grosso do Sul revealed the presence of Conularia quichua, Paraconularia africana, P. ulrichana, and Reticulaconularia caetensis sp. nov. Therefore, the diversity of the conulariid fauna recorded from the northwest border area of the basin is greater than that of the eastern border area, where the genus Reticulaconularia has not yet been found, and the presence of Paraconularia ulrichana still needs confirmation. Furthermore, our data suggest that the Paraná Basin had narrow connections with the Devonian seas of Bolivia, at least during sea-level rise, as indicated by the shared benthic marine fauna. Keywords: Conulariids, Lower Devonian, Ponta Grossa Formation, Paraná Basin.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":" ","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43039748","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}
This paper describes the foraminiferal associations along with the presentation of three new agglutinated conical foraminiferal species to the construction of the biozonation framework in the Mahallat region of central Iran. The stratigraphic distribution of benthic foraminifers is used to characterize three assemblage zones that are in ascending order: rotaliids-valvulinids Assemblage Zone, alveolinids-coskinolinids Assemblage Zone, and nummulitids-discocyclinids Assemblage Zone. These associations are characterized by marker fossils and localized from the inner ramp to the proximal outer ramp depositional environments. Their biostratigraphic range is assigned to the middle Cuisian to early Lutetian. In addition, three new agglutinated conical foraminiferal species: Daviesiconus mahallatensis sp. nov., Barattolites arghadehensis sp. nov., and Coleiconus minimus sp. nov. are described and figured for the first time from the lower Eocene shallow-water limestone in the studied area. These new species have common characteristics such as eccentric conical test with a low number of comparably coiled chambers in the early stage and uniserial chambers in the adult stage, but they differ in size, the form of test, and radial subepidermal partitions (beams, intercalary beams, and rafters). They are associated with the index Alveolina fauna and their biostratigraphic range is assigned to middle–late Cuisian (Ypresian, Early Eocene). Keywords: biostratigraphy, Early Eocene, new taxa, Mahallat, Iran.
{"title":"New agglutinated Foraminifera from Early Eocene deposits of Mahallat region, Central Iran: implication on biostratigraphy and paleoecology","authors":"S. Babazadeh","doi":"10.4072/rbp.2022.4.03","DOIUrl":"https://doi.org/10.4072/rbp.2022.4.03","url":null,"abstract":"This paper describes the foraminiferal associations along with the presentation of three new agglutinated conical foraminiferal species to the construction of the biozonation framework in the Mahallat region of central Iran. The stratigraphic distribution of benthic foraminifers is used to characterize three assemblage zones that are in ascending order: rotaliids-valvulinids Assemblage Zone, alveolinids-coskinolinids Assemblage Zone, and nummulitids-discocyclinids Assemblage Zone. These associations are characterized by marker fossils and localized from the inner ramp to the proximal outer ramp depositional environments. Their biostratigraphic range is assigned to the middle Cuisian to early Lutetian. In addition, three new agglutinated conical foraminiferal species: Daviesiconus mahallatensis sp. nov., Barattolites arghadehensis sp. nov., and Coleiconus minimus sp. nov. are described and figured for the first time from the lower Eocene shallow-water limestone in the studied area. These new species have common characteristics such as eccentric conical test with a low number of comparably coiled chambers in the early stage and uniserial chambers in the adult stage, but they differ in size, the form of test, and radial subepidermal partitions (beams, intercalary beams, and rafters). They are associated with the index Alveolina fauna and their biostratigraphic range is assigned to middle–late Cuisian (Ypresian, Early Eocene). Keywords: biostratigraphy, Early Eocene, new taxa, Mahallat, Iran.","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":"41938367","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 Ribeira de Iguape Valley, located in southeastern Brazil, is an important karstic region, presenting a large number of caves containing fossil and subfossil vertebrate materials. The Abismo Ponta de Flecha Cave is a complex vertical cave divided into galleries where a large amount of osteological material was collected. The cave acted as a natural trap for several taxa and possibly as a disposal site for ancient human communities. Osteoderms and appendicular bones assigned to two genera of Cingulata were identified in the faunal assemblage. The most abundant bone material belongs to the family Chlamyphoridae, genus Cabassous, represented by the living species C. tatouay and by remains of a larger, but little-known species, cf. C. antiquus. The other identified genus belongs to the family Dasypodidae: Dasypus sp. Evidence of human activity was characterized in only one C. tatouay bone, while the other specimens were considered as being of natural origin. Keywords: Quaternary, Chlamyphoridae, Dasypus, Cabassous, taxonomy.
Ribeira de Iguape Valley位于巴西东南部，是一个重要的岩溶区，这里有大量含有脊椎动物化石和亚化石物质的洞穴。Abismo Ponta de Flecha洞穴是一个复杂的垂直洞穴，分为画廊，收集了大量的骨材料。这个洞穴是一些类群的天然陷阱，也可能是古代人类社区的处置地点。在区系组合中鉴定出两属的骨皮和附骨。最丰富的骨骼材料属于衣虫科，Cabassous属，以现存的物种C. tatouay和一个较大但鲜为人知的物种的遗骸为代表，如C. antiquus。另一个已确定的属属于Dasypodidae: Dasypus sp.人类活动的证据仅在一个C. tatouay骨中被表征，而其他标本被认为是自然起源的。关键词:第四纪，衣蝇科，水蚤，Cabassous，分类
{"title":"Cingulata of the Abismo Ponta de Flecha Cave (Pleistocene-Holocene), Ribeira de Iguape Valley, southeastern Brazil","authors":"A. Chahud, P. Oliveira, M. Okumura","doi":"10.4072/rbp.2022.4.06","DOIUrl":"https://doi.org/10.4072/rbp.2022.4.06","url":null,"abstract":"The Ribeira de Iguape Valley, located in southeastern Brazil, is an important karstic region, presenting a large number of caves containing fossil and subfossil vertebrate materials. The Abismo Ponta de Flecha Cave is a complex vertical cave divided into galleries where a large amount of osteological material was collected. The cave acted as a natural trap for several taxa and possibly as a disposal site for ancient human communities. Osteoderms and appendicular bones assigned to two genera of Cingulata were identified in the faunal assemblage. The most abundant bone material belongs to the family Chlamyphoridae, genus Cabassous, represented by the living species C. tatouay and by remains of a larger, but little-known species, cf. C. antiquus. The other identified genus belongs to the family Dasypodidae: Dasypus sp. Evidence of human activity was characterized in only one C. tatouay bone, while the other specimens were considered as being of natural origin. Keywords: Quaternary, Chlamyphoridae, Dasypus, Cabassous, taxonomy.","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":"42213911","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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