Pub Date : 2021-08-31DOI: 10.5710/AMGH.26.05.2021.3375
Pablo Oyanadel-Urbina, Carlos De Gracia, J. Carrillo-Briceño, S. Nielsen, H. Flores, Víctor Casteletto, J. Kriwet, M. Rivadeneira, Jaime A. Villafaña
Abstract. Despite being one of the richest Neogene deposits of marine fossil vertebrates along the Pacific coast of South America, no detailed study of bony fishes from the Bahía Inglesa Formation has been carried out. Through the revision of historical collections of the Caldera Paleontological Museum, we describe 27 fossil remains of bony fishes. Fossils described here are distributed in 13 taxa. Among these, Sardinops sp. cf. S. sagax (Clupeidae) represents the first fossil record of the genus for Chile, Labrodon sp. (Labridae) and Stelliferinae (Sciaenidae) are the first respective records for the southeast Pacific Ocean, Sarda sp. (Scombridae) represents the first fossil record for South America, Semicossyphus sp. (Labridae) and Anisotremus sp. (Haemulidae) are the first respective records for the Southern Hemisphere. Gymnosarda sp. (Scombridae) is described for the first time for the Neogene. We performed a paleobathymetric analysis of fossil fishes, including elasmobranchs, to understand the paleoenvironment followed by a similarity analysis that compares the faunal composition of the Bahía Inglesa Fm. with other fossil assemblages for the Pacific of South America. Our results show that the fish fauna from the Bahía Inglesa Fm. likely represents a depth range of 98 to 382 m with a mean depth range of 252 m in an uppermost bathyal environment. The assemblage from the Bahía Inglesa Fm. shows low taxonomic similarity levels with other Neogene geological units from the southeast Pacific Ocean. The study represents the first paleoecological and paleobiogeographic analysis of the fossil fish fauna from the Southeast Pacific.
{"title":"Neogene Bony Fishes from the Bahía Inglesa Formation, Northern Chile","authors":"Pablo Oyanadel-Urbina, Carlos De Gracia, J. Carrillo-Briceño, S. Nielsen, H. Flores, Víctor Casteletto, J. Kriwet, M. Rivadeneira, Jaime A. Villafaña","doi":"10.5710/AMGH.26.05.2021.3375","DOIUrl":"https://doi.org/10.5710/AMGH.26.05.2021.3375","url":null,"abstract":"Abstract. Despite being one of the richest Neogene deposits of marine fossil vertebrates along the Pacific coast of South America, no detailed study of bony fishes from the Bahía Inglesa Formation has been carried out. Through the revision of historical collections of the Caldera Paleontological Museum, we describe 27 fossil remains of bony fishes. Fossils described here are distributed in 13 taxa. Among these, Sardinops sp. cf. S. sagax (Clupeidae) represents the first fossil record of the genus for Chile, Labrodon sp. (Labridae) and Stelliferinae (Sciaenidae) are the first respective records for the southeast Pacific Ocean, Sarda sp. (Scombridae) represents the first fossil record for South America, Semicossyphus sp. (Labridae) and Anisotremus sp. (Haemulidae) are the first respective records for the Southern Hemisphere. Gymnosarda sp. (Scombridae) is described for the first time for the Neogene. We performed a paleobathymetric analysis of fossil fishes, including elasmobranchs, to understand the paleoenvironment followed by a similarity analysis that compares the faunal composition of the Bahía Inglesa Fm. with other fossil assemblages for the Pacific of South America. Our results show that the fish fauna from the Bahía Inglesa Fm. likely represents a depth range of 98 to 382 m with a mean depth range of 252 m in an uppermost bathyal environment. The assemblage from the Bahía Inglesa Fm. shows low taxonomic similarity levels with other Neogene geological units from the southeast Pacific Ocean. The study represents the first paleoecological and paleobiogeographic analysis of the fossil fish fauna from the Southeast Pacific.","PeriodicalId":50819,"journal":{"name":"Ameghiniana","volume":"58 1","pages":"345 - 368"},"PeriodicalIF":1.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45028030","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}
Pub Date : 2021-08-31DOI: 10.5710/AMGH.29.03.2021.3423
P. S. Kavali, A. Roy, M. Pasquo, G. P. Gurumurthy, Gaurav Sharma, Ajit Kumar
Abstract. The age of the Talchir Formation corresponding to the lower part of the Gondwana (Permo–Carboniferous) Sequence in India is revised in the light of palynostratigraphic data associated with radiometric dating generated in Gondwana. New data was generated from seven samples of the Talchir Formation obtained from Well 131, located in the Penganga area of Wardha Valley Coalfield (Maharashtra State, central India). Two assemblages were demarcated based on the stratigraphic distribution of 63 species of spores (23 taxa), pollen grains (35 taxa), and phytoplankton. Palynoassociation I recognized in the two basal samples yielded few Punctatisporites spores and monosaccate pollen grains. Palynoassociation II is demarcated in the overlying three samples characterized by spores and pollen grains that are more diversified and abundant than in the other two samples. Several taxa (Concavissimisporites grumulus, Converrucosisporites confluens, Cyclogranisporites gondwanensis, Verrucosisporites andersonii, Latusipollenites quadrisaccatus, Marsupipollenites striatus, Pakhapites fusus, Striatoabieites multistriatus, Vittatina subsaccata, Vittatina vittifera) are shared with palynozones radiometrically constrained to the latest Pennsylvanian–early Cisuralian in Argentina, Brazil, Africa, and Australia. Therefore, we propose a Kasimovian to Ghezelian–Asselian age for the palynoassociations I and II of the Talchir Formation and a correlation with the Potonieisporites neglectus and Plicatipollenites gondwanensis Zones of Tiwari & Tripathi, respectively. This approach significantly improves the stratigraphic correlations of the Indian palynozones in Gondwana.
{"title":"Upper Pennsylvanian Age of the Lower Talchir Formation in the Wardha Basin, Central India, Based on Guide Palynomorphs Present in Radiometrically-Dated Palynozonations in South America, Africa, and Australia","authors":"P. S. Kavali, A. Roy, M. Pasquo, G. P. Gurumurthy, Gaurav Sharma, Ajit Kumar","doi":"10.5710/AMGH.29.03.2021.3423","DOIUrl":"https://doi.org/10.5710/AMGH.29.03.2021.3423","url":null,"abstract":"Abstract. The age of the Talchir Formation corresponding to the lower part of the Gondwana (Permo–Carboniferous) Sequence in India is revised in the light of palynostratigraphic data associated with radiometric dating generated in Gondwana. New data was generated from seven samples of the Talchir Formation obtained from Well 131, located in the Penganga area of Wardha Valley Coalfield (Maharashtra State, central India). Two assemblages were demarcated based on the stratigraphic distribution of 63 species of spores (23 taxa), pollen grains (35 taxa), and phytoplankton. Palynoassociation I recognized in the two basal samples yielded few Punctatisporites spores and monosaccate pollen grains. Palynoassociation II is demarcated in the overlying three samples characterized by spores and pollen grains that are more diversified and abundant than in the other two samples. Several taxa (Concavissimisporites grumulus, Converrucosisporites confluens, Cyclogranisporites gondwanensis, Verrucosisporites andersonii, Latusipollenites quadrisaccatus, Marsupipollenites striatus, Pakhapites fusus, Striatoabieites multistriatus, Vittatina subsaccata, Vittatina vittifera) are shared with palynozones radiometrically constrained to the latest Pennsylvanian–early Cisuralian in Argentina, Brazil, Africa, and Australia. Therefore, we propose a Kasimovian to Ghezelian–Asselian age for the palynoassociations I and II of the Talchir Formation and a correlation with the Potonieisporites neglectus and Plicatipollenites gondwanensis Zones of Tiwari & Tripathi, respectively. This approach significantly improves the stratigraphic correlations of the Indian palynozones in Gondwana.","PeriodicalId":50819,"journal":{"name":"Ameghiniana","volume":"58 1","pages":"318 - 344"},"PeriodicalIF":1.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45903468","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}
Pub Date : 2021-08-31DOI: 10.5710/1851-8044-58.4.376
A. Tomescu, Allison W. Bronson
To cite this article: Alexandru M.F. Tomescu & Allison W. Bronson (2021). FORWARD TO THE PAST: A ROMP THROUGH THE NATURE OF THE LAST HALF-BILLION YEARS. Review of “Nature through time”, E. Martinetto, E. Tschopp and R.A. Gastaldo (Eds.). 2020. 462 pp. + supplemental digital resources. Springer Textbooks in Earth Sciences, Geography and Environment. Springer. ISSN 2510-1307 and 2510-1315 (electronic). ISBN 978-3-030-35057-4 and 978-3-030-35058-1 (eBook). Ameghiniana 58(4), 376–383.
{"title":"Forward to the Past: A Romp through the Nature of the Last Half-Billion Years","authors":"A. Tomescu, Allison W. Bronson","doi":"10.5710/1851-8044-58.4.376","DOIUrl":"https://doi.org/10.5710/1851-8044-58.4.376","url":null,"abstract":"To cite this article: Alexandru M.F. Tomescu & Allison W. Bronson (2021). FORWARD TO THE PAST: A ROMP THROUGH THE NATURE OF THE LAST HALF-BILLION YEARS. Review of “Nature through time”, E. Martinetto, E. Tschopp and R.A. Gastaldo (Eds.). 2020. 462 pp. + supplemental digital resources. Springer Textbooks in Earth Sciences, Geography and Environment. Springer. ISSN 2510-1307 and 2510-1315 (electronic). ISBN 978-3-030-35057-4 and 978-3-030-35058-1 (eBook). Ameghiniana 58(4), 376–383.","PeriodicalId":50819,"journal":{"name":"Ameghiniana","volume":"105 2","pages":"376 - 383"},"PeriodicalIF":1.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41269495","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}
Pub Date : 2021-08-31DOI: 10.5710/AMGH.25.05.2021.3413
J. Pineda, S. Noetinger, E. Ottone
Abstract. We present the palynoflora recovered from the Pescado Formation in the Subandean Range, Salta Province, Argentina. The palynological assemblage comprises well-preserved marine and terrestrial palynomorphs, including cryptospores (one species), trilete spores (16 species), acritarchs (six species), prasinophytes (three species), and chlorophytes (three species). Based on the quantitative analysis and stratigraphic distribution of palynomorphs, two palynological associations are recognized (RC1, RC2). The presence of Dictyotriletes emsiensis morphon and Acinosporites apiculatus, together with Duvernaysphaera angelae and D. tenuicingulata, suggests a late Emsian–Eifelian age for RC1 and RC2. The studied assemblages contain many taxa in common with other coeval assemblages of Gondwana that confirm the paleogeographical relationships among the Argentine Precordillera, the Tarija Basin, and the southern Chacoparaná Basin in Uruguay. The relative abundance of the palynomorphs encountered suggests a marine depositional environment close to the paleo-shoreline for the RC1, and a more distal marine setting for the RC2, possibly nearshore, reflecting the Eifelian transgression. This event, already documented by different authors, is also recognized in the southern portion of the Tarija Basin.
{"title":"Palynology of the Early to Middle Devonian Pescado Formation, Subandean Range, Salta Province, Argentina","authors":"J. Pineda, S. Noetinger, E. Ottone","doi":"10.5710/AMGH.25.05.2021.3413","DOIUrl":"https://doi.org/10.5710/AMGH.25.05.2021.3413","url":null,"abstract":"Abstract. We present the palynoflora recovered from the Pescado Formation in the Subandean Range, Salta Province, Argentina. The palynological assemblage comprises well-preserved marine and terrestrial palynomorphs, including cryptospores (one species), trilete spores (16 species), acritarchs (six species), prasinophytes (three species), and chlorophytes (three species). Based on the quantitative analysis and stratigraphic distribution of palynomorphs, two palynological associations are recognized (RC1, RC2). The presence of Dictyotriletes emsiensis morphon and Acinosporites apiculatus, together with Duvernaysphaera angelae and D. tenuicingulata, suggests a late Emsian–Eifelian age for RC1 and RC2. The studied assemblages contain many taxa in common with other coeval assemblages of Gondwana that confirm the paleogeographical relationships among the Argentine Precordillera, the Tarija Basin, and the southern Chacoparaná Basin in Uruguay. The relative abundance of the palynomorphs encountered suggests a marine depositional environment close to the paleo-shoreline for the RC1, and a more distal marine setting for the RC2, possibly nearshore, reflecting the Eifelian transgression. This event, already documented by different authors, is also recognized in the southern portion of the Tarija Basin.","PeriodicalId":50819,"journal":{"name":"Ameghiniana","volume":"58 1","pages":"301 - 317"},"PeriodicalIF":1.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43989198","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}
Pub Date : 2021-08-31DOI: 10.5710/AMGH.04.06.2021.3403
Sebastián Echarri, D. Pérez, Marcelo Miñana, Sergio O. Lucero
{"title":"New Record of a Phocid (Mammalia, Carnivora, Phocidae) in the Late Miocene of Patagonia, Argentina","authors":"Sebastián Echarri, D. Pérez, Marcelo Miñana, Sergio O. Lucero","doi":"10.5710/AMGH.04.06.2021.3403","DOIUrl":"https://doi.org/10.5710/AMGH.04.06.2021.3403","url":null,"abstract":"","PeriodicalId":50819,"journal":{"name":"Ameghiniana","volume":"58 1","pages":"369 - 375"},"PeriodicalIF":1.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42971574","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}
Pub Date : 2021-07-14DOI: 10.5710/1851-8044-58.3.299
K. Baets, J. Huntley
{"title":"The Evolution and Fossil Record of Parasitism. Identification and Macroevolution of Parasites","authors":"K. Baets, J. Huntley","doi":"10.5710/1851-8044-58.3.299","DOIUrl":"https://doi.org/10.5710/1851-8044-58.3.299","url":null,"abstract":"","PeriodicalId":50819,"journal":{"name":"Ameghiniana","volume":"58 1","pages":"299 - 300"},"PeriodicalIF":1.0,"publicationDate":"2021-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47680073","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}
Pub Date : 2021-07-14DOI: 10.5710/1851-8044-58.3.297
F. Abdala
To cite this article: Fernando Abdala (2021). BIOLOGICAL CONSEQUENCES OF PLATE TECTONICS: NEW PERSPECTIVES ON POST-GONDWANA BREAK-UP—A TRIBUTE TO ASHOK SAHNI. Guntupalli V. R. Prasad, and Rajeev Patnaik (Eds.) 2020. 432 pp. Vertebrate Paleobiology and Paleoanthropology Series. Springer Nature Switzerland AG. ISBN 978-3-030-49752-1 (paper). ISBN 978-3-030-49753-8 (ebook). Ameghiniana 58(3), 297–298.
引用这篇文章:费尔南多·阿布达拉(2021)。板块构造的生物学后果:冈瓦纳破裂后的新观点——致敬阿肖克·萨尼。Guntupalli V. R. Prasad和Rajeev Patnaik(编)2020。《古脊椎动物与古人类学丛书》432页。自然瑞士股份有限公司ISBN 978-3-030-49752-1(论文)。ISBN 978-3-030-49753-8(电子书)。植物学报，58(3)，297-298。
{"title":"Biological Consequences of Plate Tectonics: New Perspectives on Post-Gondwana Break-Up—A Tribute to Ashok Sahni","authors":"F. Abdala","doi":"10.5710/1851-8044-58.3.297","DOIUrl":"https://doi.org/10.5710/1851-8044-58.3.297","url":null,"abstract":"To cite this article: Fernando Abdala (2021). BIOLOGICAL CONSEQUENCES OF PLATE TECTONICS: NEW PERSPECTIVES ON POST-GONDWANA BREAK-UP—A TRIBUTE TO ASHOK SAHNI. Guntupalli V. R. Prasad, and Rajeev Patnaik (Eds.) 2020. 432 pp. Vertebrate Paleobiology and Paleoanthropology Series. Springer Nature Switzerland AG. ISBN 978-3-030-49752-1 (paper). ISBN 978-3-030-49753-8 (ebook). Ameghiniana 58(3), 297–298.","PeriodicalId":50819,"journal":{"name":"Ameghiniana","volume":"58 1","pages":"297 - 298"},"PeriodicalIF":1.0,"publicationDate":"2021-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48393437","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}
Pub Date : 2021-06-30DOI: 10.5710/AMGH.05.02.2021.3387
Luis Otavio Rezende Castro, D. Garcia-Lopez, L. Bergqvist, H. I. de Araújo‐Júnior
Abstract. A new basal notoungulate, Nanolophodon tutuca gen. et sp. nov., is described. This is represented by maxillary and dental fragments and by isolated teeth. The holotype and referred material were found at the “1968 Fissure” of the Itaboraí Basin, Rio de Janeiro State, Brazil. This basin has been regarded as early Eocene in recent contributions. The generalized appearance and brachydonty of the studied specimens, together with the presence of certain typical traits (poorly developed entolophid, well-developed metacone column, etc.) indicate that N. tutuca can be considered among the group of genera traditionally known as henricosborniids, easily distinguishable from Typotheria by the absence of crista 1 and from Toxodontia by the absence of crista intermedia. It is also different from all other henricosborniids by a combination of characters, such as the presence of a long crochet, the development of two small cristae in the ectoloph, and the large paraconid, among others. In the context of a phylogenetic analysis performed, we do not find conclusive evidence about the synonymy between Itaboraitherium atavum and Othnielmarshia pristina. In turn, we question the reference of these forms as henricosborniids, based on the complex occlusal dental pattern observed in both cases. Finally, based on the observations made in the present study, we discuss the identification of the paraconid in notoungulates, which may be associated with some cusps located mesially to the metaconid and identified as pseudoparaconids in past studies.
摘要报道了一种新的基础无节肢动物Nanolophodon tutuca gen. et sp. nov.。这是代表上颌和牙齿碎片和孤立的牙齿。在巴西巴西里约热内卢州Itaboraí盆地的“1968裂缝”中发现了完整的模型和参考材料。在最近的贡献中，该盆地被认为是早始新世。所研究标本的总体外观和短齿，以及某些典型特征(发育不良的鼻虫，发育良好的元锥柱等)的存在表明，N. tutuca可以被认为是传统上被称为henricosborniids的属群之一，由于缺乏嵴1，很容易与Typotheria区分开来，并且由于缺乏中嵴而与Toxodontia区分开来。它也不同于所有其他henricosbornid的特征组合，例如存在一个长钩针，在生态鞘中发育两个小嵴，以及大的副嵴，等等。在系统发育分析的背景下，我们没有发现关于Itaboraitherium atavum和Othnielmarshia pristina之间同义关系的确凿证据。反过来，我们质疑参考这些形式作为henricosborniids，基于复杂的咬合牙模式观察到在这两种情况下。最后，根据本研究的观察结果，我们讨论了在非节肢动物中对副纲的识别，这可能与一些位于副纲附近的尖头有关，这些尖头在过去的研究中被鉴定为伪副纲。
{"title":"A New Basal Notoungulate from the Itaboraí Basin (Paleogene) of Brazil","authors":"Luis Otavio Rezende Castro, D. Garcia-Lopez, L. Bergqvist, H. I. de Araújo‐Júnior","doi":"10.5710/AMGH.05.02.2021.3387","DOIUrl":"https://doi.org/10.5710/AMGH.05.02.2021.3387","url":null,"abstract":"Abstract. A new basal notoungulate, Nanolophodon tutuca gen. et sp. nov., is described. This is represented by maxillary and dental fragments and by isolated teeth. The holotype and referred material were found at the “1968 Fissure” of the Itaboraí Basin, Rio de Janeiro State, Brazil. This basin has been regarded as early Eocene in recent contributions. The generalized appearance and brachydonty of the studied specimens, together with the presence of certain typical traits (poorly developed entolophid, well-developed metacone column, etc.) indicate that N. tutuca can be considered among the group of genera traditionally known as henricosborniids, easily distinguishable from Typotheria by the absence of crista 1 and from Toxodontia by the absence of crista intermedia. It is also different from all other henricosborniids by a combination of characters, such as the presence of a long crochet, the development of two small cristae in the ectoloph, and the large paraconid, among others. In the context of a phylogenetic analysis performed, we do not find conclusive evidence about the synonymy between Itaboraitherium atavum and Othnielmarshia pristina. In turn, we question the reference of these forms as henricosborniids, based on the complex occlusal dental pattern observed in both cases. Finally, based on the observations made in the present study, we discuss the identification of the paraconid in notoungulates, which may be associated with some cusps located mesially to the metaconid and identified as pseudoparaconids in past studies.","PeriodicalId":50819,"journal":{"name":"Ameghiniana","volume":"58 1","pages":"272 - 288"},"PeriodicalIF":1.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46431198","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}
Pub Date : 2021-06-30DOI: 10.5710/AMGH.22.02.2021.3407
P. Santamarina, V. Barreda, A. Iglesias, A. Varela
1Museo Argentino de Ciencias Naturales "Bernardino Rivadavia" (MACN-CONICET), División Paleobotánica, Sección Paleopalinología, Av. Ángel Gallardo 470, C1405DJR Ciudad Autónoma de Buenos Aires, Argentina. 2Instituto de Investigaciones en Biodiversidad y Medioambiente (INIBIOMA, CONICET-UNCO), Quintral 1250, R8400FRF San Carlos de Bariloche, Río Negro, Argentina. 3Y-TEC S.A (CONICET), Av. del Petróleo Argentino s/n, B2700XAE, Villa Progreso, Buenos Aires, Argentina. 4Cátedra de Micromorfología de Suelos, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, Calle 122 y 60 s/n, B1900, La Plata, Buenos Aires, Argentina. PATRICIO E. SANTAMARINA1 VIVIANA D. BARREDA1 ARI IGLESIAS2 AUGUSTO N. VARELA3,4
阿根廷自然科学博物馆“Bernardino Rivadavia”（MACN-CONICET），AV古孢粉学科古植物学司。Angel Gallardo 470，C1405DJR阿根廷布宜诺斯艾利斯自治市。2生物多样性和环境研究所（INIBIOMA，CONICET-UNCO），Quintral 1250，R8400FRF San Carlos de Bariloche，里奥内格罗，阿根廷。3Y-TEC S.A（Conicet），AV。阿根廷布宜诺斯艾利斯Villa Progreso，B2700xae，阿根廷石油公司。阿根廷布宜诺斯艾利斯拉普拉塔国家大学自然科学与博物馆学院土壤微观形态教授，Calle 122和60 S/N，B1900，拉普拉塔。Patricio E.Santamarina1 Viviana D.Barreda1 Ari Iglesias2 Augusto N.瓦雷拉3，4
{"title":"Palaeomohria Spores from the Cenomanian in Patagonia, Argentina","authors":"P. Santamarina, V. Barreda, A. Iglesias, A. Varela","doi":"10.5710/AMGH.22.02.2021.3407","DOIUrl":"https://doi.org/10.5710/AMGH.22.02.2021.3407","url":null,"abstract":"1Museo Argentino de Ciencias Naturales \"Bernardino Rivadavia\" (MACN-CONICET), División Paleobotánica, Sección Paleopalinología, Av. Ángel Gallardo 470, C1405DJR Ciudad Autónoma de Buenos Aires, Argentina. 2Instituto de Investigaciones en Biodiversidad y Medioambiente (INIBIOMA, CONICET-UNCO), Quintral 1250, R8400FRF San Carlos de Bariloche, Río Negro, Argentina. 3Y-TEC S.A (CONICET), Av. del Petróleo Argentino s/n, B2700XAE, Villa Progreso, Buenos Aires, Argentina. 4Cátedra de Micromorfología de Suelos, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, Calle 122 y 60 s/n, B1900, La Plata, Buenos Aires, Argentina. PATRICIO E. SANTAMARINA1 VIVIANA D. BARREDA1 ARI IGLESIAS2 AUGUSTO N. VARELA3,4","PeriodicalId":50819,"journal":{"name":"Ameghiniana","volume":"58 1","pages":"289 - 296"},"PeriodicalIF":1.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47892734","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}
Pub Date : 2021-06-30DOI: 10.5710/AMGH.19.03.2021.3415
L. J. Ruffo Rey
Abstract. This palynological study presents a systematic update of the Cerro de Las Cabras Formation at its type section. Thirty-three genera and 81 species of palynomorphs are incorporated, including forms recorded for the first time in the Triassic of Argentina. Additionally, 53 forms of palynomorphs were synonymized with new or already known species of the unit from the taxonomic revision of previously published material. Four new combinations were proposed: Secarisporites argenteiformis, S. lobatoverrucosus, S. verrucosus and S. volkheimerii. The palynoflora is dominated by species of the Alisporites/Falcisporites, the Cycadopites/Monosulcites, the Secarisporites/Leptolepidites, and the Densoisporites/Lundbladispora complexes. The locally common presence of Illinites (∼14%), cf. Rimaesporites (∼4%), Minutosaccus (∼2.7%), Staurosaccites (∼2.3%), Protodiploxypinus (∼2%), Angustisulcites (∼1.7%), and Brachysaccus (∼1.7%) is noteworthy. The Permian taxa Cladaitina sp., Limitisporites rectus, Lueckisporites sp., Platysaccus sp. cf. P. trumpii, Protohaploxypinus goraiensis, Punctatisporites gretensis, and Retusotriletes sp. cf. R. nigritellus are interpreted to occur in situ. The common presence of typical north-central European species such as Illinites chitonoides and Illinites kosankei, along with the co-occurrences of Densoisporites playfordii, Angustisulcites gorpii, Ovalipollis notabilis, Samaropollenites speciosus, and Staurosaccites quadrifidus, enable the constraining of the age of the palynoflora to the late Anisian–early Ladinian. On the other hand, the present study reveals a greater number of species shared with the Northern Hemisphere and low-mid latitudes of Gondwana, including typical Onslow elements such as cf. Rimaesporites aquilonalis, Samaropollenites speciosus, Staurosaccites quadrifidus, and Minutosaccus crenulatus, which allow us to ascribe the studied assemblage to a mixed Onslow-Ipswich palynoflora.
{"title":"New Palynological Data of the Cerro de las Cabras Formation (Middle Triassic) at its Type Locality, Mendoza, Argentina. Biostratigraphic and Phytogeographic Implications","authors":"L. J. Ruffo Rey","doi":"10.5710/AMGH.19.03.2021.3415","DOIUrl":"https://doi.org/10.5710/AMGH.19.03.2021.3415","url":null,"abstract":"Abstract. This palynological study presents a systematic update of the Cerro de Las Cabras Formation at its type section. Thirty-three genera and 81 species of palynomorphs are incorporated, including forms recorded for the first time in the Triassic of Argentina. Additionally, 53 forms of palynomorphs were synonymized with new or already known species of the unit from the taxonomic revision of previously published material. Four new combinations were proposed: Secarisporites argenteiformis, S. lobatoverrucosus, S. verrucosus and S. volkheimerii. The palynoflora is dominated by species of the Alisporites/Falcisporites, the Cycadopites/Monosulcites, the Secarisporites/Leptolepidites, and the Densoisporites/Lundbladispora complexes. The locally common presence of Illinites (∼14%), cf. Rimaesporites (∼4%), Minutosaccus (∼2.7%), Staurosaccites (∼2.3%), Protodiploxypinus (∼2%), Angustisulcites (∼1.7%), and Brachysaccus (∼1.7%) is noteworthy. The Permian taxa Cladaitina sp., Limitisporites rectus, Lueckisporites sp., Platysaccus sp. cf. P. trumpii, Protohaploxypinus goraiensis, Punctatisporites gretensis, and Retusotriletes sp. cf. R. nigritellus are interpreted to occur in situ. The common presence of typical north-central European species such as Illinites chitonoides and Illinites kosankei, along with the co-occurrences of Densoisporites playfordii, Angustisulcites gorpii, Ovalipollis notabilis, Samaropollenites speciosus, and Staurosaccites quadrifidus, enable the constraining of the age of the palynoflora to the late Anisian–early Ladinian. On the other hand, the present study reveals a greater number of species shared with the Northern Hemisphere and low-mid latitudes of Gondwana, including typical Onslow elements such as cf. Rimaesporites aquilonalis, Samaropollenites speciosus, Staurosaccites quadrifidus, and Minutosaccus crenulatus, which allow us to ascribe the studied assemblage to a mixed Onslow-Ipswich palynoflora.","PeriodicalId":50819,"journal":{"name":"Ameghiniana","volume":"58 1","pages":"181 - 206"},"PeriodicalIF":1.0,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48605630","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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