Acta Palaeontologica Romaniae最新文献

CHALLENGES IN ORBITOLINID IDENTIFICATION AND BIOSTRATIGRAPHIC CONSEQUENCES: AN APTIAN EXAMPLE 眶藻类鉴定的挑战和生物地层学的后果：一个始新世的例子

Acta Palaeontologica Romaniae Pub Date : 2024-03-14 DOI: 10.35463/j.apr.2024.02.02

Felix Schlagintweit

引用次数: 0

BELOPTERA LONGA NAEF, 1922 (CEPHALOPODA: COLEOIDEA) FROM THE LATE EOCENE (PALAEOGENE) OF UKRAINE Beloptera longa naef, 1922 (cephalopoda: coleoidea) from the late eocene (palaeogene) of ukraine 克拉科夫晚始新世（古近纪）的 Beloptera longa naef, 1922 (cephalopoda: coleoidea)

Acta Palaeontologica Romaniae Pub Date : 2024-03-11 DOI: 10.35463//j.apr.2024.02.01

V. Dernov

引用次数: 0

GEOMETRIC MORPHOMETRIC APPROACH TO ESTABLISH PHYLOGENETIC AFFINITIES OF ENIGMATIC PTEROSAUR SPECIMENS FROM THE LOWER CRETACEOUS OF SOUTH KOREA 用几何形态计量学方法确定韩国下白垩统神秘翼龙标本的系统发育亲缘关系

Acta Palaeontologica Romaniae Pub Date : 2024-02-11 DOI: 10.35463/j.apr.2024.01.06

Chan-gyu Yun

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引用次数: 0

GEOMETRIC MORPHOMETRIC APPROACH TO ESTABLISH PHYLOGENETIC AFFINITIES OF ENIGMATIC PTEROSAUR SPECIMENS FROM THE LOWER CRETACEOUS OF SOUTH KOREA 用几何形态计量学方法确定韩国下白垩统神秘翼龙标本的系统发育亲缘关系

Acta Palaeontologica Romaniae Pub Date : 2024-02-11 DOI: 10.35463/j.apr.2024.01.06

Chan-gyu Yun

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引用次数: 0

NEW MIDDLE TRIASSIC BELL-SHAPED NASSELLARIAN RADIOLARIA FROM ALPINE AND CARPATHIAN AREAS 高山和阡陌地区新发现的中三叠世钟状纳塞尔放射虫

Acta Palaeontologica Romaniae Pub Date : 2024-02-11 DOI: 10.35463/j.apr.2024.01.05

P. Dumitrică

引用次数: 0

PALYNOSTRATIGRAPHIC AND PALAEOENVIRONMENTAL INVESTIGATIONS OF THE MAASTRICHTIAN FROM OARDA DE JOS (SOUTHWESTERN TRANSYLVANIAN BASIN) 奥尔达-德约斯（西南特兰西瓦尼亚盆地）马斯特里赫特古地层的古地层学和古环境研究

Acta Palaeontologica Romaniae Pub Date : 2024-02-11 DOI: 10.35463/j.apr.2024.01.07

D. Țabără, Z. Csiki-Sava

{"title":"PALYNOSTRATIGRAPHIC AND PALAEOENVIRONMENTAL INVESTIGATIONS OF THE MAASTRICHTIAN FROM OARDA DE JOS (SOUTHWESTERN TRANSYLVANIAN BASIN)","authors":"D. Țabără, Z. Csiki-Sava","doi":"10.35463/j.apr.2024.01.07","DOIUrl":"https://doi.org/10.35463/j.apr.2024.01.07","url":null,"abstract":"A palynological, palynofacies and organic geochemical investigation of the Upper Cretaceous continental vertebrate site of Oarda de Jos allowed us to constrain its age and to make more detailed inferences about its depositional environment. The recovered palynomorph assemblage is represented mainly by angiosperm pollen and fern spores, alongside rare taxa of gymnosperms. Biostratigraphically significant taxa identified in the assemblage restrict the age of the studies deposits to the later early Maastrichtian. The palynofloral evidence indicates plant communities that mainly preferred higher-altitude areas and cooler-wetter conditions. However, a spore and pollen assemblage which derives from vegetation typical of lacustrine areas or riverbanks also occurs in the studied deposits. The studied palynoflora shows quite significant differences compared to previously published palynological assemblages from the same geological unit (the Sebeș Formation), although from deposits located slightly to the north, at Pâclișa. Organic geochemical data show that certain organic biomarkers such as n-alkanes n-C16 to n-C18 reach the highest values, and indicate that they may derive from freshwater colonial green algae such as Scenedesmus. The palynofacies constituents used to reconstruct the depositional environment suggest an exclusive terrestrial organic matter deposited in a stagnant-water fluvial/lacustrine environment.","PeriodicalId":486764,"journal":{"name":"Acta Palaeontologica Romaniae","volume":"104 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139785385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

PALYNOSTRATIGRAPHIC AND PALAEOENVIRONMENTAL INVESTIGATIONS OF THE MAASTRICHTIAN FROM OARDA DE JOS (SOUTHWESTERN TRANSYLVANIAN BASIN) 奥尔达-德约斯（西南特兰西瓦尼亚盆地）马斯特里赫特古地层的古地层学和古环境研究

Acta Palaeontologica Romaniae Pub Date : 2024-02-11 DOI: 10.35463/j.apr.2024.01.07

D. Țabără, Z. Csiki-Sava

{"title":"PALYNOSTRATIGRAPHIC AND PALAEOENVIRONMENTAL INVESTIGATIONS OF THE MAASTRICHTIAN FROM OARDA DE JOS (SOUTHWESTERN TRANSYLVANIAN BASIN)","authors":"D. Țabără, Z. Csiki-Sava","doi":"10.35463/j.apr.2024.01.07","DOIUrl":"https://doi.org/10.35463/j.apr.2024.01.07","url":null,"abstract":"A palynological, palynofacies and organic geochemical investigation of the Upper Cretaceous continental vertebrate site of Oarda de Jos allowed us to constrain its age and to make more detailed inferences about its depositional environment. The recovered palynomorph assemblage is represented mainly by angiosperm pollen and fern spores, alongside rare taxa of gymnosperms. Biostratigraphically significant taxa identified in the assemblage restrict the age of the studies deposits to the later early Maastrichtian. The palynofloral evidence indicates plant communities that mainly preferred higher-altitude areas and cooler-wetter conditions. However, a spore and pollen assemblage which derives from vegetation typical of lacustrine areas or riverbanks also occurs in the studied deposits. The studied palynoflora shows quite significant differences compared to previously published palynological assemblages from the same geological unit (the Sebeș Formation), although from deposits located slightly to the north, at Pâclișa. Organic geochemical data show that certain organic biomarkers such as n-alkanes n-C16 to n-C18 reach the highest values, and indicate that they may derive from freshwater colonial green algae such as Scenedesmus. The palynofacies constituents used to reconstruct the depositional environment suggest an exclusive terrestrial organic matter deposited in a stagnant-water fluvial/lacustrine environment.","PeriodicalId":486764,"journal":{"name":"Acta Palaeontologica Romaniae","volume":"44 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139845397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

NEW MIDDLE TRIASSIC BELL-SHAPED NASSELLARIAN RADIOLARIA FROM ALPINE AND CARPATHIAN AREAS 高山和阡陌地区新发现的中三叠世钟状纳塞尔放射虫

Acta Palaeontologica Romaniae Pub Date : 2024-02-11 DOI: 10.35463/j.apr.2024.01.05

P. Dumitrică

引用次数: 0

PARURGONINA VALANGINIANA N. SP. FROM THE VALANGINIAN OF SW IRAN (ZAGROS ZONE): THE FIRST CRETACEOUS RECORD OF THE GENUS 来自伊朗西南部(扎格罗斯带)的瓦兰吉尼亚Parurgonina valanginiana n. spp:该属的第一个白垩纪记录

Acta Palaeontologica Romaniae Pub Date : 2023-10-18 DOI: 10.35463/j.apr.2024.01.03

FELIX SCHLAGINTWEIT, MOHSEN YAZDI-MOGHADAM, BRUNO GRANIER, ROHOLLAH HOSSEINZADEH

{"title":"PARURGONINA VALANGINIANA N. SP. FROM THE VALANGINIAN OF SW IRAN (ZAGROS ZONE): THE FIRST CRETACEOUS RECORD OF THE GENUS","authors":"FELIX SCHLAGINTWEIT, MOHSEN YAZDI-MOGHADAM, BRUNO GRANIER, ROHOLLAH HOSSEINZADEH","doi":"10.35463/j.apr.2024.01.03","DOIUrl":"https://doi.org/10.35463/j.apr.2024.01.03","url":null,"abstract":"The new larger benthic foraminifer Parurgonina valanginiana is described from the Valanginian deposits of the Fahliyan Formation of southwestern Iran (Zagros Zone). It is separated from the uppermost Oxfordian-lowermost Tithonian generotype P. caelinensis (Cuvillier et al.) by a distinct time gap. The Lower Cretaceous specimens exhibit a larger embryonic chamber whereas the internal structural and other biometric data are generally in conformity with the Upper Jurassic morphotypes. Besides the Middle Jurassic P. primaeva Kamoun & Peybernès and the Upper Jurassic P. caelinensis, P. valanginiana sp. nov. represents the third species of the genus described and possibly a Valanginian marker endemic for the Arabian Plate. In the Fahliyan Formation, P. valanginiana sp. nov. occurs in wackestones associated with Pseudocyclammina lituus (Yokoyama). Additional data for the micropalaeontological assemblages (benthic foraminifera, calcareous algae) of the shallow-water carbonates of the Fahliyan Formation are provided. As it is also the case in the United Arab Emirates (Granier, 2008), it is proposed that the Tithonian/Berriasian boundary does not, as generally indicated in the literature, coincide with the boundary of the Hith Formation and the Fahliyan Formation, but instead occurs within the latter. The new finds provide further evidence that the Tithonian/Berriasian boundary did not represent a major rupture or extinction for larger benthic foraminifera. On the contrary, the Berriasian/Valanginian boundary corresponds to a natural discontinuity (both sedimentological and biological) possibly enhanced by a hiatus of the upper Berriasian strata. The foraminiferal diversity remains quite high during early Valanginian times then falls drastically, which suggests that the Berriasian/Valanginian crisis is a double barelled crisis (first base Valanginian, second intra-Valanginian).","PeriodicalId":486764,"journal":{"name":"Acta Palaeontologica Romaniae","volume":"140 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135884880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

SPINOSAURS AS PHYTOSAUR MIMICS: A CASE OF CONVERGENT EVOLUTION BETWEEN TWO EXTINCT ARCHOSAURIFORM CLADES 棘龙作为植物龙的模仿者:两个已灭绝的始祖进化分支趋同进化的一个案例

Acta Palaeontologica Romaniae Pub Date : 2023-09-09 DOI: 10.35463/j.apr.2024.01.02

CHAN-GYU YUN

引用次数: 0