Ronaldo Araujo Leoni, M. Dantas, A. Cherkinsky, Laís Alves-Silva
Isotopic paleoecology (δ13c, δ18o) of mammals from the late Pleistocene–Holocene of Ituaçu, Bahia, Brazil. In this paper, the isotopic paleoecology (δ13C, δ18O) of fossils of the mammals Alouatta sp., Cebus sp., Myocastor coypus, Dicotyles tajacu, Tamandua tetradactyla, and Tapirus terrestris collected in Lapa do Bode cave, Ituaçu Municipality, State of Bahia, is described. Radiocarbon ages of 6,480–6,653 Cal yr. BP (14C collagen = 5,790±25 years) were obtained for T. tetradactyla and 27,798–28,221 Cal yr. BP (14C collagen = 23,950±50 years) for M. coypus. The herbivore taxa (T. terrestris, δ13C = -14.9 ‰; Alouatta sp., δ13C = -13.0 ‰; M. coypus, δ13C = -12.7 ‰) had a diet composed mainly of C3 plants (piC3< 80%), indicating forested environment, a similar interpretation also suggested from other taxa that ingested >60% C3 plants such as Cebus sp. (δ13C = -13.1 ‰); D. tajacu (δ13C = -9.7 ‰; T. tetradactyla, δ13C = -11.0 ‰), allowing to suggest that these taxa lived in low-density forests and arboreal savanna habitats. Keywords: caves, paleodiet, carbon isotopes, oxygen isotopes.
巴西巴伊亚伊图阿苏更新世晚期至全新世哺乳动物的同位素古生态学（δ13c，δ18o）。本文介绍了在巴伊亚州伊图阿苏市拉帕多博德洞穴采集的哺乳动物Alouatta sp.、Cebus sp.、Myocacastor coypus、Dicotyles tajacu、Tamandua tetractyla和Tapirus terrestris化石的同位素古生态学（δ13C，δ18O）。四趾T.coypus的放射性碳年龄为6480–6653 Cal yr.BP（14C胶原蛋白=5790±25年），而M.coypus为27798–28221 Cal yr.BP（14C-胶原蛋白=23950±50年）。食草动物类群（T.terrestris，δ13C=-14.9‰；Alouatta sp.，δ13C=-13.0‰；M.coypus，δ13C=-12.7‰）的饮食主要由C3植物组成（piC3＜80%），表明森林环境，其他摄入>60%C3植物的类群也提出了类似的解释，如Cebus sp.（δ13C=-13.1‰）；D.tajacu（δ13C=-9.7‰；T.tetractyla，δ13C=-11.0‰），这表明这些分类群生活在低密度森林和树栖稀树草原栖息地。关键词：洞穴，古饮食，碳同位素，氧同位素。
{"title":"Paleoecologia isotópica (δ13C, δ18O) de mamíferos do Pleistoceno final–Holoceno de Ituaçu, Bahia, Brasil","authors":"Ronaldo Araujo Leoni, M. Dantas, A. Cherkinsky, Laís Alves-Silva","doi":"10.4072/rbp.2023.2.05","DOIUrl":"https://doi.org/10.4072/rbp.2023.2.05","url":null,"abstract":"Isotopic paleoecology (δ13c, δ18o) of mammals from the late Pleistocene–Holocene of Ituaçu, Bahia, Brazil. In this paper, the isotopic paleoecology (δ13C, δ18O) of fossils of the mammals Alouatta sp., Cebus sp., Myocastor coypus, Dicotyles tajacu, Tamandua tetradactyla, and Tapirus terrestris collected in Lapa do Bode cave, Ituaçu Municipality, State of Bahia, is described. Radiocarbon ages of 6,480–6,653 Cal yr. BP (14C collagen = 5,790±25 years) were obtained for T. tetradactyla and 27,798–28,221 Cal yr. BP (14C collagen = 23,950±50 years) for M. coypus. The herbivore taxa (T. terrestris, δ13C = -14.9 ‰; Alouatta sp., δ13C = -13.0 ‰; M. coypus, δ13C = -12.7 ‰) had a diet composed mainly of C3 plants (piC3< 80%), indicating forested environment, a similar interpretation also suggested from other taxa that ingested >60% C3 plants such as Cebus sp. (δ13C = -13.1 ‰); D. tajacu (δ13C = -9.7 ‰; T. tetradactyla, δ13C = -11.0 ‰), allowing to suggest that these taxa lived in low-density forests and arboreal savanna habitats. Keywords: caves, paleodiet, carbon isotopes, oxygen isotopes.","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":"46804843","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}
Fernanda Britto da Silva, A. Martinelli, Jorge Ferigolo, A. M. Ribeiro
The Predebon Site, located in São João do Polêsine, Quarta Colônia region (Rio Grande do Sul, Brazil) has a Triassic fauna, including footprints and traces of small vertebrates and abundant remains of rhynchosaurs. This fauna is typical of the Hyperodapedon Assemblage Zone, which is correlated to the late Carnian Ischigualasto Formation (Ischigualasto-Villa Unión Basin) in Argentina. The present study records new fossil remains for the Predebon Site collected in 2001 that consists of two dorsal and two sacral vertebrae referred to the same individual (MCN-PV 10344), and two isolated, serrated blade-shaped teeth (MCN-PV 10425 and 10426). The trunk vertebrae were identified as between 11th and 15th. The sacral vertebrae are fully fused, with no indication of another fused vertebral element, not even signs suggestive of dorsosacral and caudosacral vertebrae, also because the ilia are not preserved. The general characteristics observed are: (i) lateral fossa in the vertebral body; (ii) concave ventral face of the vertebral body; (iii) neural spine high and wide at the top, subquadrangular in shape, in both dorsal and sacral vertebrae; (iv) infrapre- and infrapostzygapophyseal ridges on the dorsals; (v) presence of hyposphene and hypantrum; and (vi) first sacral vertebra larger than the second, with transverse processes and broad sacral ribs, triangular in shape in dorsal view. This set of features in the vertebral elements is similar to that present in Herrerasaurus ischigualastensis from the Ischigualasto Formation and allows us to consider MCN-PV 10344 as a member of the Herrerasauridae clade. It differs from Staurikosaurus pricei, which has three smaller and more slender sacral vertebrae and a low neural spine without subquadrangular platform at the top, and from Gnathovorax cabreirai, which has subrectangular platforms, slightly more elongated anteroposteriorly, suggesting the presence of a new herrerasaurid morphotype. The two isolated, serrated blade-shaped teeth were attributed to Archosauriformes indet., because this morphotype is observed in several groups within this clade. Keywords: Dinosauria, Hyperodapedon Assemblage Zone, late Carnian, Predebon Site, Rio Grande do Sul, Brazil.
位于巴西Quarta Colônia地区(里约热内卢Grande do Sul, Brazil)的s o jo o do Polêsine的Predebon遗址有三叠纪动物群，包括小型脊椎动物的足迹和痕迹，以及大量的喙龙遗骸。该动物群是典型的Hyperodapedon组合带，与阿根廷晚卡尼世Ischigualasto组(Ischigualasto- villa Unión盆地)相关。本研究记录了2001年在Predebon遗址收集的新化石遗骸，其中包括同一个体(MCN-PV 10344)的两个脊椎骨和两个椎骨，以及两个独立的锯齿状叶片状牙齿(MCN-PV 10425和10426)。躯干椎骨被鉴定在11号到15号之间。骶椎完全融合，没有其他椎体融合的迹象，甚至没有骶背椎和骶尾椎的迹象，也是因为髂骨没有保存。观察到的一般特征是:(1)椎体侧窝;(ii)椎体腹侧凹;(iii)脊椎骨上部高而宽，近四边形，位于脊椎骨和骶骨;(iv)背部的骨突下脊和骨突下脊;(v)存在副脾和副窦;(6)第一骶椎比第二骶椎大，有横突和宽的骶肋，背部呈三角形。这组椎体元素的特征与来自Ischigualasto组的Herrerasaurus ischigualastensis相似，这使我们可以将MCN-PV 10344视为Herrerasauridae分支的成员。它不同于有三个更小、更细的骶骨和一个较低的神经脊柱，顶端没有近四边形平台的普里塞特龙，也不同于有近矩形平台的卡布雷齿龙，这表明存在一种新的herrasaurid形态。这两颗分离的锯齿状刃状牙齿属于indet始祖龙。因为这种形态在这个分支的几个群体中都有观察到。关键词:恐龙，超足类组合带，晚卡尼世，Predebon遗址，里约热内卢Sul，巴西
{"title":"A new herrerasaurid dinosaur record from southern BrazilL (Upper Triassic) and its faunal association","authors":"Fernanda Britto da Silva, A. Martinelli, Jorge Ferigolo, A. M. Ribeiro","doi":"10.4072/rbp.2023.2.02","DOIUrl":"https://doi.org/10.4072/rbp.2023.2.02","url":null,"abstract":"The Predebon Site, located in São João do Polêsine, Quarta Colônia region (Rio Grande do Sul, Brazil) has a Triassic fauna, including footprints and traces of small vertebrates and abundant remains of rhynchosaurs. This fauna is typical of the Hyperodapedon Assemblage Zone, which is correlated to the late Carnian Ischigualasto Formation (Ischigualasto-Villa Unión Basin) in Argentina. The present study records new fossil remains for the Predebon Site collected in 2001 that consists of two dorsal and two sacral vertebrae referred to the same individual (MCN-PV 10344), and two isolated, serrated blade-shaped teeth (MCN-PV 10425 and 10426). The trunk vertebrae were identified as between 11th and 15th. The sacral vertebrae are fully fused, with no indication of another fused vertebral element, not even signs suggestive of dorsosacral and caudosacral vertebrae, also because the ilia are not preserved. The general characteristics observed are: (i) lateral fossa in the vertebral body; (ii) concave ventral face of the vertebral body; (iii) neural spine high and wide at the top, subquadrangular in shape, in both dorsal and sacral vertebrae; (iv) infrapre- and infrapostzygapophyseal ridges on the dorsals; (v) presence of hyposphene and hypantrum; and (vi) first sacral vertebra larger than the second, with transverse processes and broad sacral ribs, triangular in shape in dorsal view. This set of features in the vertebral elements is similar to that present in Herrerasaurus ischigualastensis from the Ischigualasto Formation and allows us to consider MCN-PV 10344 as a member of the Herrerasauridae clade. It differs from Staurikosaurus pricei, which has three smaller and more slender sacral vertebrae and a low neural spine without subquadrangular platform at the top, and from Gnathovorax cabreirai, which has subrectangular platforms, slightly more elongated anteroposteriorly, suggesting the presence of a new herrerasaurid morphotype. The two isolated, serrated blade-shaped teeth were attributed to Archosauriformes indet., because this morphotype is observed in several groups within this clade. Keywords: Dinosauria, Hyperodapedon Assemblage Zone, late Carnian, Predebon Site, Rio Grande do Sul, Brazil.","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":"43884338","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 nominal genus Prestosuchus Huene was originally proposed comprising two nominal species but without a valid indication of the type-species. According to the International Code of Zoological Nomenclature, this indication is essential for proposals after the year 1930. Consequently, both nominal species, although valid, have a very uncomfortable situation. Therefore, a new nominal genus, Huenesuchus, is here proposed to correct this nomenclatural situation to be used in the new combination Huenesuchus chiniquensis. In addition, it is noted that two class-group names that have been used lately in the literature are previously occupied. The first, Suchia Krebs, is previously occupied by Simpson. The second, Loricata Merrem, is previously occupied by Schumacher. Therefore, two substitute names are here proposed: Holosuchia for the first and Loricatosuchia for the second. Keywords: Archosauria, Prestosuchus, Huenesuchus, Santa Maria Formation, Triassic.
{"title":"A new nominal genus for “Prestosuchus” chiniquensis Huene, 1938 (Triassic of southern Brazil): Huenesuchus, genus novus et combinatio nova","authors":"Edio-Ernst Kischlat","doi":"10.4072/rbp.2023.2.01","DOIUrl":"https://doi.org/10.4072/rbp.2023.2.01","url":null,"abstract":"The nominal genus Prestosuchus Huene was originally proposed comprising two nominal species but without a valid indication of the type-species. According to the International Code of Zoological Nomenclature, this indication is essential for proposals after the year 1930. Consequently, both nominal species, although valid, have a very uncomfortable situation. Therefore, a new nominal genus, Huenesuchus, is here proposed to correct this nomenclatural situation to be used in the new combination Huenesuchus chiniquensis. In addition, it is noted that two class-group names that have been used lately in the literature are previously occupied. The first, Suchia Krebs, is previously occupied by Simpson. The second, Loricata Merrem, is previously occupied by Schumacher. Therefore, two substitute names are here proposed: Holosuchia for the first and Loricatosuchia for the second. Keywords: Archosauria, Prestosuchus, Huenesuchus, Santa Maria Formation, Triassic.","PeriodicalId":49616,"journal":{"name":"Revista Brasileira De Paleontologia","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2023-07-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41400839","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 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}
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