Cretaceous Research最新文献_第5页

The first record of gars (Ginglymodi: Lepisosteidae) from the Upper Cretaceous of Bulgaria reveals a wider paleogeographic distribution of lepisosteids within the European Archipelago 保加利亚上白垩世首次记录到嘎尔斯鱼（Ginglymodi: Lepisosteidae），揭示了欧洲群岛内鳞翅目鱼类更广泛的古地理分布

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2024-08-20 DOI: 10.1016/j.cretres.2024.105985

Vladimir Nikolov , Plamen Andreev , Georgi Voykov , Docho Dochev

{"title":"The first record of gars (Ginglymodi: Lepisosteidae) from the Upper Cretaceous of Bulgaria reveals a wider paleogeographic distribution of lepisosteids within the European Archipelago","authors":"Vladimir Nikolov , Plamen Andreev , Georgi Voykov , Docho Dochev","doi":"10.1016/j.cretres.2024.105985","DOIUrl":"10.1016/j.cretres.2024.105985","url":null,"abstract":"<div><p>The bony-fishes of the clade Lepisosteidae, commonly called ‘gars’ or ‘gar-fish’, are a lineage of proficient piscivores with evolutionary history spanning about 150 million years, which are today represented by two genera inhabiting the freshwater and brackish areas of southeastern North America, Central America, and Cuba. This was not the case during the Late Cretaceous when lepisosteids were more diverse and had much wider geographical distribution. Gar fossils, albeit very fragmentary, are a common component of the Upper Cretaceous freshwater and brackish vertebrate assemblages in Europe, yet all of the pre-upper Campanian records come from the western and central parts of the Late Cretaceous European Archipelago. Here we describe new lepisosteid material from Bulgaria, comprising nine teeth and three scales found at the uppermost Santonian–lowermost Campanian Vrabchov Dol vertebrate locality. These fossils represent the easternmost record of gars within the European Archipelago to date. Despite being found in a lagoonal to foreshore deposits, the paleontological content of the locality, the incompleteness and preservational state of the material, as well as the predominantly non-marine ecology of modern and fossils gars suggest that these fossils belong to fishes which inhabited more inland, freshwater environments. The Vrabchov Dol lepisosteids remains are the first record of gars in Bulgaria and one of the rare documented occurrences of Mesozoic osteichthyans in the country. This material expands the paleobiogeographic distribution of the Lepisosteidae within the European Archipelago.</p></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"165 ","pages":"Article 105985"},"PeriodicalIF":1.9,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142122770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Lower Cretaceous iguanodontian dinosaurs from the southwestern margin of Gondwana 冈瓦纳西南边缘的下白垩世巨蜥龙类恐龙

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2024-08-17 DOI: 10.1016/j.cretres.2024.105983

Jhonatan Alarcón-Muñoz , Penélope Cruzado-Caballero , Omar Vicencio Campos , Claudio Bravo-Ortiz , Erick Vargas Bugueño , Dániel Bajor , Mario E. Suárez , Juan Pablo Guevara , Alexander O. Vargas , David Rubilar-Rogers

{"title":"Lower Cretaceous iguanodontian dinosaurs from the southwestern margin of Gondwana","authors":"Jhonatan Alarcón-Muñoz , Penélope Cruzado-Caballero , Omar Vicencio Campos , Claudio Bravo-Ortiz , Erick Vargas Bugueño , Dániel Bajor , Mario E. Suárez , Juan Pablo Guevara , Alexander O. Vargas , David Rubilar-Rogers","doi":"10.1016/j.cretres.2024.105983","DOIUrl":"10.1016/j.cretres.2024.105983","url":null,"abstract":"<div><p>The early evolutionary and biogeographical history of Gondwanan iguanodontian dinosaurs is poorly understood due to their scarce Lower Cretaceous fossil record. In South America, the Lower Cretaceous iguanodontian osteological record is very fragmentary and most published reports cannot be used to discard or confirm hadrosauroid affinities. The single exception is <em>Tietasaura</em> from Brazil, whose incomplete femur shows a combination of traits found only in non-hadrosauroid iguandontians. Furthermore, no skeletal remains whatsoever of Lower Cretaceous iguanodontians have been reported from the western margin of South America. Here, we describe an isolated ornithopod caudal centrum (SGO.PV.22900) from the Lower Cretaceous Quebrada Monardes Formation in the Atacama Desert, northern Chile. Although incomplete, SGO.PV.22900 presents iguanodontian traits, such as the sub-hexagonal contour of the articular faces, the rectangular profile in lateral view and the absence of transverse processes below the neurocentral suture. We were also able to use quantitative measurements to explore taxonomic affinities, by carrying out a Linear Discriminant Analysis (LDA) and a Principal Components Analysis (PCA) using measurements of caudal centra of several iguanodontian species. The results of both analyses are consistent with those of our comparisons and suggest that SGO.PV.22900 belongs to a non-hadrosauroid iguanodontian ornithopod. This specimen represents one of the most compelling and best documented pieces of osteological evidence of Lower Cretaceous non-hadrosauroid iguanodontian dinosaurs in South America and provides further support for the presence of iguanodontians in the southwestern margin of Gondwana since at least the Early Cretaceous, as previously suggested based on footprints.</p></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"165 ","pages":"Article 105983"},"PeriodicalIF":1.9,"publicationDate":"2024-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142096731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A long-snouted dyrosaurid (Crocodyliformes, Mesoeucrocodylia) from the Campanian Quseir Formation of Egypt 埃及坎帕尼亚古赛尔地层出土的长吻龙类（鳄形目，中原龙科

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2024-08-16 DOI: 10.1016/j.cretres.2024.105982

Sara Saber , Belal S. Salem , Khaled Ouda , Abdullah S. Gohar , Sanaa El-Sayed , Hesham M. Sallam

{"title":"A long-snouted dyrosaurid (Crocodyliformes, Mesoeucrocodylia) from the Campanian Quseir Formation of Egypt","authors":"Sara Saber , Belal S. Salem , Khaled Ouda , Abdullah S. Gohar , Sanaa El-Sayed , Hesham M. Sallam","doi":"10.1016/j.cretres.2024.105982","DOIUrl":"10.1016/j.cretres.2024.105982","url":null,"abstract":"<div><p>Dyrosauridae, a clade of neosuchian crocodyliforms, was a significant component of terrestrial and aquatic ecosystems across the latest Cretaceous to Paleogene of North Africa. Here, we report a dyrosaurid mandibular symphysis recovered from the middle–upper Campanian Quseir Formation near Kharga Oasis in the southern Western Desert of Egypt.</p><p>This is a partial mandible (MUVP 635), including dentaries and splenials, assigned to Dyrosauridae based on its dental pattern, size, and the shape of the splenial in the symphysis. MUVP 635 exhibits alveolar diameters shorter than the interalveolar distances within the same row. Moreover, the seventh dentary alveolus is significantly large, comparable in size to the fourth dentary alveolus, while the sixth dentary alveolus is positioned close to the seventh dentary alveolus and is as small as the eighth dentary alveolus, which is adjacent to the ninth dentary alveolus. Phylogenetic analysis places MUVP 635 as an early-diverging member of Dyrosauridae, consistent with its middle–late Campanian age. It aligns with a polytomy with <em>Chenanisuchus lateroculi</em> and <em>Anthracosuchus balrogus</em> identified as the most basal members of Dyrosauridae. The discovery of new dyrosaurid material in the Quseir Formation extends the range of Dyrosauridae to the middle Campanian, highlighting the taxonomic richness of the dyrosaurid clade across North Africa and supporting hypotheses of the African origin for this family.</p></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"165 ","pages":"Article 105982"},"PeriodicalIF":1.9,"publicationDate":"2024-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142084375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The impact of microbial mats in promoting record of Maastrichtian crocodylomorph tracks from Yacoraite Formation, Argentina 微生物垫对促进阿根廷亚科拉特地层马斯特里赫特鳄科动物足迹记录的影响

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2024-08-14 DOI: 10.1016/j.cretres.2024.105981

Alfredo Alejandro Martín , Silvina de Valais , Ignacio Díaz-Martínez , Patricio Guillermo Villafañe , Gabriel Ricardo López Isla , Paolo Citton

{"title":"The impact of microbial mats in promoting record of Maastrichtian crocodylomorph tracks from Yacoraite Formation, Argentina","authors":"Alfredo Alejandro Martín , Silvina de Valais , Ignacio Díaz-Martínez , Patricio Guillermo Villafañe , Gabriel Ricardo López Isla , Paolo Citton","doi":"10.1016/j.cretres.2024.105981","DOIUrl":"10.1016/j.cretres.2024.105981","url":null,"abstract":"<div><p>Here we report tetrapod tracks from a stratigraphic level of Maastrichtian age in the Yacoraite Formation (Maimará ichnosite, Jujuy Province, Argentina). The ichnological material consists of convex hyporeliefs whose formation was induced by growth of microbial mats in an upper subtidal-lower intertidal setting. Ichnological features that are recognized in tracks and traces allowed to include them into the categories of ‘punting tracks’ and ‘buoyancy tracks’. These categories suggest swim behaviours of the producers, which are tentatively interpreted as crocodylomorphs. Reconstruction of the filling process leading to tracks preservation and inclusion into the geological record enabled reconstructing at least two different phases of mats development, one dominated by chemical precipitation and the other by trapping and binding of coated grains and other particles. These two phases of mat growth are related to slightly changing energetic conditions of the palaeoenvironment and further support a marine origin for the unit. Finally, it is suggested that biologically induced, in-situ mineral precipitation promotes fast formation of overtracks through early lithification achieving preservation of tetrapod tracks well before their complete filling.</p></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"165 ","pages":"Article 105981"},"PeriodicalIF":1.9,"publicationDate":"2024-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142048699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Femoral diversity in titanosaur sauropods from the Villalba de la Sierra Fm. (Central Spain): Implications for the characterization of faunal turnover in the Ibero-Armorican Late Cretaceous 比利亚尔巴德拉谢拉地层（西班牙中部）泰坦龙类的股骨多样性：对伊比利亚-阿莫里卡晚白垩世动物群更替特征的影响

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2024-08-12 DOI: 10.1016/j.cretres.2024.105969

Adrián Páramo , Pedro Mocho , Francisco Ortega

{"title":"Femoral diversity in titanosaur sauropods from the Villalba de la Sierra Fm. (Central Spain): Implications for the characterization of faunal turnover in the Ibero-Armorican Late Cretaceous","authors":"Adrián Páramo , Pedro Mocho , Francisco Ortega","doi":"10.1016/j.cretres.2024.105969","DOIUrl":"10.1016/j.cretres.2024.105969","url":null,"abstract":"<div><p>The late Campanian-Maastrichtian in the Ibero-Armorican domain is rich in titanosaurian fossils. The sauropod remains exhibit a high degree of morphological variability, especially in the commonly-found appendicular elements. The phylogenetic relationships of the Ibero-Armorican titanosaurs are still uncertain but we do know that they experienced a Campanian-Maastrichtian herbivorous faunal turnover. It is probable that the small-to-medium-sized Lirainosaurinae-dominated faunas of the Campanian were replaced by late–early Maastrichtian large-bodied lithostrotian dominated faunas. In this context, the Villalba de La Sierra Formation has yielded an abundant sample of medium-to-large sized titanosaurs. In this study we analyze the morphological variability in the appendicular skeleton of the titanosaurs from the Campanian-Maastrichtian Ibero-Armorican domain. We follow previous attempts to classify the commonly-found isolated titanosaurian femora and expand the proposed methodology. The use of combined phenotypic characters and linear morphometrics can be helpful to analyze the morphological variability and diversity of the Ibero-Armorican titanosaurs. Our findings corroborate the presence of at least two exclusive morphotypes in the Lo Hueco fossil site and one exclusive morphotype in the Poyos site, as well as the presence of previously defined Lirainosaurinae across the Pyrenees during the Campanian-Maastrichtian. The Villalba de La Sierra Formation titanosaurs are also clustered with large-bodied late Maastrichtian titanosaurs. It is possible that either the large-bodied late–early Maastrichtian immigrants, with possible Gondwanan affinities, entered the Iberian Peninsula much earlier or that this group was already present at least during the Campanian-Maastrichtian transition, as the small-sized Lirainosaurinae declined.</p></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"166 ","pages":"Article 105969"},"PeriodicalIF":1.9,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142233614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cocoseae: A dominant arecoid palm element in the Deccan K-Pg flora of Madhya Pradesh, Central India Cocoseae：印度中部中央邦德干 K-Pg 植物区系中的一种主要类人猿棕榈元素

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2024-08-09 DOI: 10.1016/j.cretres.2024.105974

Sanchita Kumar , Steven R. Manchester , Mahasin Ali Khan

{"title":"Cocoseae: A dominant arecoid palm element in the Deccan K-Pg flora of Madhya Pradesh, Central India","authors":"Sanchita Kumar , Steven R. Manchester , Mahasin Ali Khan","doi":"10.1016/j.cretres.2024.105974","DOIUrl":"10.1016/j.cretres.2024.105974","url":null,"abstract":"<div><p>Here, we report the occurrence of a large number of fossil fruits with distinctive germination pores along with a petrified stem, resembling morphologically and anatomically the extant palm tribe Cocoseae Mart. ex Dumort. of the subfamily Arecoideae. The permineralized fruits and locule casts, assigned to <em>Palmocarpon drypeteoides</em> (Mehrotra, Prakash, and Bande) Manchester et al., and the stem of <em>Palmoxylon</em> sp. were recovered from the Deccan Intertrappean Beds (late Mastrichtian–early Danian sediments; c. 66–65 Ma) of Umariya Ryt. village in Dindori District, Madhya Pradesh, Central India. Using micro–computed tomography (mCT) and standard thin section methods, we observed for the first time that these fossil palm fruits have a persistent basal trimerous perianth. These fossils, along with other reports in the literature, suggest that cocosoid palms were dominant among the arecoid palms of the Deccan Intertrappean beds in Madhya Pradesh. At present, the modern relatives do not grow in the same area but they occur in tropical forests of southeastern and eastern India as well as other regions including parts of South America, Asia, Europe, and Africa. The expansions and retraction of the cocosoid palms likely coincide with climate change. The recovery of cocosoid fossils (present and earlier reported) and previously described tropical elements from the same fossil locality suggest the existence of tropical climatic conditions during the period of depositions. We also revisit the historical phytogeography of the cocosoid palms.</p></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"165 ","pages":"Article 105974"},"PeriodicalIF":1.9,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142077132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characteristics and paleoenvironmental indications of caddisfly larval cases-stromatolite bioherms in the Lower Cretaceous in Liupanshan Basin, Central China 华中六盘山盆地下白垩统笛毛蝇幼虫-叠层石生物群落特征及古环境指示

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2024-08-08 DOI: 10.1016/j.cretres.2024.105973

Fangpeng Du , Jianyu Yang , Xiaochen Zhao , Xiaoyuan He , Ping Zhang , Jiayao Zhang , Haojie Wang , Yuxuan Kang

{"title":"Characteristics and paleoenvironmental indications of caddisfly larval cases-stromatolite bioherms in the Lower Cretaceous in Liupanshan Basin, Central China","authors":"Fangpeng Du , Jianyu Yang , Xiaochen Zhao , Xiaoyuan He , Ping Zhang , Jiayao Zhang , Haojie Wang , Yuxuan Kang","doi":"10.1016/j.cretres.2024.105973","DOIUrl":"10.1016/j.cretres.2024.105973","url":null,"abstract":"<div><p>Fossil caddisfly larval cases (CLCs) are of great significance for reflecting the habits of ancient caddisfly and indicating the paleoenvironment. Multiple layers with bioherms formed by fossil CLCs and stromatolites were found to be distributed in the Lower Cretaceous in Liupanshan Basin, Central China. In order to deeply understand the characteristics and formation environment of the CLCs-stromatolite bioherms, a series studies were conducted on the Yaoshan section in the northeastern of the basin. Morphological anatomy, mineralogy, element geochemistry, and isotope geochemistry are included in the studies. It reveals that the CLCs-stromatolite bioherms in Yaoshan are mainly composed of calcite and dolomite mineralogically, and CLCs and stromatolite morphologically.</p><p>In the bioherms, a large number of fossil CLCs stacked orderly, with a conical shape perpendicular to the stratum distribution. The bioherms were deposited in a semi-enclosed saline lake in hot and dry paleoclimate, and they were mainly formed during the periods when the evaporation increased, the water body became shallower, and the supply of terrestrial material increased.</p></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"165 ","pages":"Article 105973"},"PeriodicalIF":1.9,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141992581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Palynological evidence for the Late Cretaceous lake transgression event in the Songliao Basin, NE China 中国东北松辽盆地晚白垩世湖泊横断事件的古植物学证据

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2024-08-05 DOI: 10.1016/j.cretres.2024.105971

Qun Yang , Qiaoer Ying , Liqin Li , Jian Zhang , Fanhao Gong , Shouliang Sun , Hongshan Wang , Xiao Tan , Fei Liang

{"title":"Palynological evidence for the Late Cretaceous lake transgression event in the Songliao Basin, NE China","authors":"Qun Yang , Qiaoer Ying , Liqin Li , Jian Zhang , Fanhao Gong , Shouliang Sun , Hongshan Wang , Xiao Tan , Fei Liang","doi":"10.1016/j.cretres.2024.105971","DOIUrl":"10.1016/j.cretres.2024.105971","url":null,"abstract":"<div><p>The lake transgression event (LTE) associated with a lake anoxic event (LAE) has been reported previously from the Cretaceous Nenjiang Formation in the Songliao Basin, NE China. Detailed studies based on sedimentology, dinoflagellates, ostracods, and biomarkers have provided important evidence for this LTE in Member 1 of the Nenjiang Formation (K<sub>2</sub>n<sup>1</sup>). However, the related floristic record has not received enough attention. In this paper, palynological data of borehole Ji Tao Di-1 (JTD-1) from the western slope of the Songliao Basin were analyzed to investigate vegetation and climate changes associated with this Cretaceous LTE. Three palynological sub-assemblages reflect significant paleovegetation and paleoclimate changes through this LTE and reveal ecosystem fluctuations related to the global Cretaceous oceanic anoxic event (OAE3). A significant increase in the relative abundance of <em>Schizaeoisporites</em> and <em>Cyathidites</em> spores may represent the LTE in the Nenjiang Formation. Principal Components Analysis (PCA) and Sporomorph EcoGroup (SEG) model indicate that climate changed from cool and humid subtropical before the LTE, to relatively warm temperate during the LTE and temperate after the LTE in this area. The relatively warmer and drier climate during the later period of the LTE may be influenced by the contemporaneous OAE3. After the LTE, the highland mixed forests were dominant, and a large number of angiosperms (i.e., members of the Proteaceae) occupied the ecological niches of the middle canopy, indicating that the flourishing of angiosperms in the late Santonian may be closely related to environmental disturbances resulted from the LTE and OAE.</p></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"165 ","pages":"Article 105971"},"PeriodicalIF":1.9,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141932635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Calibrating the Jehol Biota in the Baiwan Basin of the North Qinling Orogenic Belt, central China 中国中部北秦岭造山带白湾盆地热河生物群的校准

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2024-08-03 DOI: 10.1016/j.cretres.2024.105972

Siyu Song , Xiao Teng , Xin Zhang , Haichun Zhang , Daran Zheng

引用次数: 0

Encrusting bryozoan attached to terrestrial plant leaves from brackish deposits of the Lefipán Formation (Patagonia, Argentina), close to the K/Pg boundary 莱菲潘地层咸水沉积物（阿根廷巴塔哥尼亚）中附着在陆生植物叶片上的包壳贝类，接近 K/Pg 边界

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2024-08-02 DOI: 10.1016/j.cretres.2024.105970

César Augusto Taboada, María Alejandra Pagani, Rubén Cúneo

{"title":"Encrusting bryozoan attached to terrestrial plant leaves from brackish deposits of the Lefipán Formation (Patagonia, Argentina), close to the K/Pg boundary","authors":"César Augusto Taboada, María Alejandra Pagani, Rubén Cúneo","doi":"10.1016/j.cretres.2024.105970","DOIUrl":"10.1016/j.cretres.2024.105970","url":null,"abstract":"<div><p>Cretaceous bryozoans from South America have received limited attention despite their sporadic documentation. The K/Pg boundary has been identified in numerous fossil-rich basins in Patagonia, where bryozoans are frequent components of the faunas. Material recovered from upper Maastrichtian outcrops of the Lefipán Formation in the Cañadón Asfalto Basin (Patagonia, Argentina) includes a unique species of cheilostome bryozoan, <em>Conopeum foliorum</em> n. sp., attached to leaf remains of terrestrial plants and associated with scarce euryhaline bivalves. It likely thrived in a warm climate, shallow, well-lit brackish environment influenced by tides, located along the northwest margin of the Paso del Sapo embayment. <em>Conopeum foliorum</em> n. sp. is currently among the earliest known bryozoans from brackish water environments, and the second oldest documented instance of a bryozoan encrusting leaves of terrestrial plants, representing the first of such finding in South America. Based on our findings and available sedimentological and paleoecological data from previous studies, we interpreted <em>Conopeum foliorum</em> n. sp. as a fast-growing opportunistic taxon displaying euryhaline habits and prone to colonize terrestrial plant leaves deposited in a brackish-water nearshore environment.</p></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"164 ","pages":"Article 105970"},"PeriodicalIF":1.9,"publicationDate":"2024-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141932636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0