Cretaceous Research最新文献_第9页

New information on the anatomy and paleobiogeographic and stratigraphic distributions of the British basal turtle Plastremys lata (Helochelydridae) based on its most complete skeleton (lower Albian, Spain) 基于最完整骨架的英国底龟lata Plastremys （Helochelydridae）解剖学、古地理和地层分布的新资料（西班牙Albian下游）

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2025-12-01 Epub Date: 2025-06-06 DOI: 10.1016/j.cretres.2025.106179

A. Pérez-García , E. Espílez , L. Mampel , A. Cobos

{"title":"New information on the anatomy and paleobiogeographic and stratigraphic distributions of the British basal turtle Plastremys lata (Helochelydridae) based on its most complete skeleton (lower Albian, Spain)","authors":"A. Pérez-García , E. Espílez , L. Mampel , A. Cobos","doi":"10.1016/j.cretres.2025.106179","DOIUrl":"10.1016/j.cretres.2025.106179","url":null,"abstract":"<div><div>The synchronous and sympatric presence of two helochelydrids is reported here for the first time for the Spanish Municipality of Ariño (Teruel Province), where the most complete skeletons from that group had been found for the European record. The presence of two members of this lineage of basal turtles has been documented in very few localities worldwide, and until now consisted of isolated and fragmented remains. Although the lower Albian <em>Aragochersis lignitesta</em> is exclusively documented in this Spanish paleontological area, the new material from Ariño is identified as the oldest occurrence for the British <em>Plastremys lata</em>, extending the paleobiogeographic distribution range for that taxon. The new fossils include a partial skeleton, as well as isolated remains of several individuals. Their analysis not only shows intraspecific variability, but also documents several anatomical elements previously unknown for <em>Plastremys lata</em>, which was only known from shell remains. Furthermore, the status of the first Mesozoic turtle taxon defined for the Spanish record (i.e., the hitherto problematic ‘<em>Trachyaspis turbulensis</em>’, also from the lower Albian of Teruel) is examined and its holotype, whose original anatomical attribution is here revised, is reattributed to <em>Plastremys lata</em>.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"176 ","pages":"Article 106179"},"PeriodicalIF":1.9,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144322606","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 rare plioplatecarpine mosasaur Latoplatecarpus in Europe as further evidence of a semi-global Campanian marine vertebrate fauna 欧洲罕见的ploplatecarpine翼龙是半全球性坎帕尼亚海洋脊椎动物动物群的进一步证据

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2025-12-01 Epub Date: 2025-02-23 DOI: 10.1016/j.cretres.2025.106102

Dmitry V. Grigoriev , Maxim S. Arkhangelsky , Nikolay G. Zverkov , Denis I. Gubarev

{"title":"The rare plioplatecarpine mosasaur Latoplatecarpus in Europe as further evidence of a semi-global Campanian marine vertebrate fauna","authors":"Dmitry V. Grigoriev , Maxim S. Arkhangelsky , Nikolay G. Zverkov , Denis I. Gubarev","doi":"10.1016/j.cretres.2025.106102","DOIUrl":"10.1016/j.cretres.2025.106102","url":null,"abstract":"<div><div>The study of mosasaurid materials from the Campanian Rybushka Formation of the Beloe Ozero locality (Saratov Region, Russia) revealed that the only plioplatecarpine taxon identifiable at genus level is <em>Latoplatecarpus</em>. Among other abundant North American plioplatecarpines, this rare genus is known from only a few specimens. New plioplatecarpine material from Russia comprises isolated but exceptionally well preserved cranial and postcranial elements including maxilla, dentary, frontals, pterygoid, quadrates, fragment of braincase, elements of pectoral girdle and vertebrae, from which most cranial remains can be referred to <em>Latoplatecarpus</em> cf<em>. willistoni</em>. Considering that Campanian fossil record of plioplatecarpines is extremely scarce in Europe compared to that from North America, specimens from the Beloe Ozero locality shed new light on paleogeography of the group. The record of <em>Latoplatecarpus</em> outside of North America demonstrates that this genus had a significantly wider geographic and stratigraphic distribution. This augments previous evidence that many mosasaurid taxa had cosmopolitan distribution across the Atlantic, and that Campanian marine vertebrate faunas of the Western Interior Seaway and European epicontinental seas had many taxa in common.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"176 ","pages":"Article 106102"},"PeriodicalIF":1.9,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144314278","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

Side by side with titans: A new rebbachisaurid dinosaur from the Huincul Formation (upper Cenomanian) of Patagonia, Argentina 与泰坦并排：阿根廷巴塔哥尼亚Huincul组（上塞诺曼尼亚）发现的一种新的雷巴奇龙

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2025-12-01 Epub Date: 2025-06-13 DOI: 10.1016/j.cretres.2025.106188

Flavio Bellardini , Leonardo S. Filippi , José L. Carballido , Alberto C. Garrido , Mattia A. Baiano

{"title":"Side by side with titans: A new rebbachisaurid dinosaur from the Huincul Formation (upper Cenomanian) of Patagonia, Argentina","authors":"Flavio Bellardini , Leonardo S. Filippi , José L. Carballido , Alberto C. Garrido , Mattia A. Baiano","doi":"10.1016/j.cretres.2025.106188","DOIUrl":"10.1016/j.cretres.2025.106188","url":null,"abstract":"<div><div>Rebbachisaurids are medium to large-sized, non-selective and ground-level browser diplodocoid sauropods, and they are characterised by highly specialised skulls, widely pneumatized axial elements and gracile appendicular skeletons. Known from the Early Cretaceous to the early Late Cretaceous, the rebbachisaurid fossil record is particularly diversified in Gondwana, with several specimens found in North Africa and South America. Notably, Patagonia has yielded over more than half of all known Rebbachisauridae, including the most basal forms and the youngest rebbachisaurid remains to date. Herein, we describe a new species of Rebbachisauridae from the Huincul Formation (upper Cenomanian) of the Neuquén Basin (Patagonia, Argentina): <em>Astigmasaura genuflexa</em> gen. et sp. nov. New laboratory work provided the complete osteology of the specimen MAU-Pv-EO-629, complementing the previously published hind limb anatomy. Thus, the type material of <em>Astigmasaura</em> comprises the posterior portion of an articulated, postcranial skeleton of a single, morphologically adult individual. <em>Astigmasaura</em> shares different conditions with other Rebbachisauridae, including anterior caudal vertebrae with tall neural spines and tetraradiate neural laminae, asymmetric middle haemal arches, mediolaterally compressed proximal tibiae, and femur with medially inclined distal condyles. Furthermore, <em>Astigmasaura</em> shows a unique combination of diagnostic features that distinguish it from all other sauropods. This new record not only provides new morphological information about the caudal and pelvic girdle anatomy of Rebbachisauridae, which is poorly known to date, and suggests a greater taxonomic diversification within the family during the last stages of its evolutionary history than known before.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"176 ","pages":"Article 106188"},"PeriodicalIF":1.9,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144480260","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 last non-avian theropods of Europe: Palaeoecology and biogeography inferred from dental records from the uppermost Maastrichtian of Catalonia, Spain 欧洲最后的非鸟类兽脚亚目动物：从西班牙加泰罗尼亚马斯特里赫特人的牙齿记录推断的古生态学和生物地理学

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2025-12-01 Epub Date: 2025-07-03 DOI: 10.1016/j.cretres.2025.106199

Oscar Castillo-Visa , Mattia Antonio Baiano , Stephen L. Brusatte , Àngel Galobart , Bernat Vila

{"title":"The last non-avian theropods of Europe: Palaeoecology and biogeography inferred from dental records from the uppermost Maastrichtian of Catalonia, Spain","authors":"Oscar Castillo-Visa , Mattia Antonio Baiano , Stephen L. Brusatte , Àngel Galobart , Bernat Vila","doi":"10.1016/j.cretres.2025.106199","DOIUrl":"10.1016/j.cretres.2025.106199","url":null,"abstract":"<div><div>Non-avian theropods were essential components of terrestrial ecosystems during the Mesozoic, were highly diverse in size and lifestyles across different regions of the planet. Here we assess the composition and diversity of the theropod fauna of the Ibero-Armorican island (the ancient region that encompassed present-day areas of Spain, Portugal, and France) during the final few hundred thousand years of the Cretaceous, by reviewing the theropod teeth assemblage from the locality of Molí del Baró-1 (upper Maastrichtian, C29r, Catalonia, Spain). Our study indicates a diverse fauna of small non-avian theropods with different feeding strategies and ecological niches. The tooth assemblage is significantly more diverse than previously thought and includes dental elements referred to dromaeosaurines, velociraptorines, troodontids, and an undetermined Dromaeosauridae tooth with similarities to microraptorines, as well as previously-referred teeth of cf. ?<em>Richardoestesia</em> and aff. <em>Paronychodon</em>. Microwear analysis reveals diverse feeding styles among these theropods, and particularly indicates that the troodontid had an omnivorous diet heavy in plant consumption. The assemblage of small-sized non-avian theropods and medium-to large-sized abelisaurids from the uppermost Maastrichtian of Ibero-Armorica differs from others from the European archipelago and worldwide, illustrating the high regional variability of theropod faunas around the time the asteroid impact ended the Cretaceous.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"176 ","pages":"Article 106199"},"PeriodicalIF":1.9,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144670733","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 potential of fossil primary feather in taxonomic and ecological prediction 原始羽毛化石在分类学和生态学预测中的潜力

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2025-12-01 Epub Date: 2025-06-13 DOI: 10.1016/j.cretres.2025.106191

Jing Zhang , Baoxia Du , Jing Peng , Yiqiao Fu , Mingzhen Zhang , Jingjing Cai , Mingyang Wei , Aijing Li

{"title":"The potential of fossil primary feather in taxonomic and ecological prediction","authors":"Jing Zhang , Baoxia Du , Jing Peng , Yiqiao Fu , Mingzhen Zhang , Jingjing Cai , Mingyang Wei , Aijing Li","doi":"10.1016/j.cretres.2025.106191","DOIUrl":"10.1016/j.cretres.2025.106191","url":null,"abstract":"<div><div>Feathers, shaped by the interplay of phylogenetic factors and environmental behaviors, serve not only as critical indicators for avian classification but also as carriers of information regarding flight patterns and ecological habitats. Although isolated fossil feathers are frequently undervalued due to the lack of direct skeletal associations, their well-preserved outline and microstructure can provide critical insights into key issues such as feather evolution, the origin of flight behavior, and taxonomic diversity. In this study, we discovered an exceptionally well-preserved distal primary feather from the Lower Cretaceous in the Jiuquan Basin of northwest China. We extracted the morphological outlines of modern primary feathers for elliptic Fourier analysis and combined microstructural data to test whether feather morphology can be used to distinguish taxonomic groups, orders, and habitats. The results indicate that the flight feather morphology in modern birds is predominantly shaped by flight-related adaptations, with significant morphospace differentiation across flight types and taxonomic orders, while habitat exerts minimal influence on feather architecture. Furthermore, multivariate statistical analyses that incorporate fossil data into modern datasets suggest that the primary feather fossil occupies a morphospace position associated with terrestrial ecological and flight mode similar to that of modern passerine type, indicating a potential association between the fossil feather and enantiornithines. However, accurate identification of fossil feather information requires expanded fossil data collection to uncover further insights embedded within the fossilized feathers.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"176 ","pages":"Article 106191"},"PeriodicalIF":1.9,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144491865","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

Vertebrate coprolites from the marine Upper Cretaceous of Coimbra (west-central Portugal): Palaeoenvironmental and palaeoecological significance 科英布拉（葡萄牙中西部）海相上白垩纪脊椎动物粪化石：古环境和古生态意义

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2025-12-01 Epub Date: 2025-06-13 DOI: 10.1016/j.cretres.2025.106190

Ricardo J. Pimentel , Pedro Callapez , Fernando Barroso-Barcenilla , Mélani Berrocal-Casero , Vanda Faria Santos

{"title":"Vertebrate coprolites from the marine Upper Cretaceous of Coimbra (west-central Portugal): Palaeoenvironmental and palaeoecological significance","authors":"Ricardo J. Pimentel , Pedro Callapez , Fernando Barroso-Barcenilla , Mélani Berrocal-Casero , Vanda Faria Santos","doi":"10.1016/j.cretres.2025.106190","DOIUrl":"10.1016/j.cretres.2025.106190","url":null,"abstract":"<div><div>A collection of 123 non-spiral vertebrate coprolites collected in the Tentúgal Formation from the middle Cenomanian, near Casais dos Carecos (Coimbra, west-central Portugal) is classified into eight different morphotypes (A to H) based on their morphology, size, poles shape, structure, and surface texture. The coprolites are autochthonous or parautochthonous, usually well-preserved without signs of abrasion or significant deformation. Each displays a uniform colouration, with hues ranging smoothly from yellow to reddish-yellow across the assemblage, and show low prevalence of surface traces, reflecting fast burial and a fossilization process under consistent environmental conditions. The calcium-phosphate composition of the coprolites, along with the presence of macro inclusions of bone elements in some specimens, indicates that they were produced by carnivores. The larger coprolites with circumferential constriction could be related to the crocodylomorphs. Other possible producers were marine squamates and teleosts. This study provides more insights into the Cretaceous marine and marginal marine ecosystems of the Aptian-Turonian West Portuguese Carbonate Platform, contributing to our understanding of the palaeoenvironmental conditions and food web interactions within this shallow epicontinental sea from the south European branch of the Tethyan realm.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"176 ","pages":"Article 106190"},"PeriodicalIF":1.9,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144480261","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

Crocodyliform remains from the Upper Cretaceous (Turonian) Tamagawa Formation, northeastern Japan with preliminary dietary reconstruction through dental microwear texture analysis 日本东北部上白垩世（Turonian） Tamagawa组鳄鱼形化石，通过牙齿微磨损结构分析初步重建饮食结构

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2025-12-01 Epub Date: 2025-06-29 DOI: 10.1016/j.cretres.2025.106197

Kubo Tai , Kodai Usami , Ren Hirayama , Masaya Iijima , Daniela E. Winkler , Ai Ito , Hikaru Uno , Shinya Miyata , Mugino O. Kubo

{"title":"Crocodyliform remains from the Upper Cretaceous (Turonian) Tamagawa Formation, northeastern Japan with preliminary dietary reconstruction through dental microwear texture analysis","authors":"Kubo Tai , Kodai Usami , Ren Hirayama , Masaya Iijima , Daniela E. Winkler , Ai Ito , Hikaru Uno , Shinya Miyata , Mugino O. Kubo","doi":"10.1016/j.cretres.2025.106197","DOIUrl":"10.1016/j.cretres.2025.106197","url":null,"abstract":"<div><div>Here we describe recently recovered crocodyliform remains from the Tamagawa Formation of Kuji Group, Kuji city, northeastern Japan. The material comprises osteoderms, vertebrae, a frontal bone, and isolated teeth. The dorsal paravertebral osteoderms bear a sagittal keel on the posterior half of the element, extending to its caudal margin, which indicates the presence of paralligatorids within the Kuji crocodyliform assemblage. Further, the Kuji crocodyliform assemblage may have consisted of multiple taxa, as the frontal bone lacks the sagittal keel characteristic of paralligatorids. Contemporaneous paralligatorids have been reported from Northeastern China, Mongolia, and Uzbekistan. The discovery of a potential paralligatorid from Kuji, Japan, suggests that paralligatorids were widely distributed across Asia, from coastal to inland regions, during the Late Cretaceous. Furthermore, potential diets of taxa included in the crocodyliform assemblage from Kuji were estimated through dental microwear texture analysis. The dental microwear texture observed in Kuji specimens is distinct from that of piscivorous and small crocodylians (skull length <20 cm), while comparable to that of large crocodylians consuming hard-objects (skull length >20 cm). Considering the existence of a medium-sized species (3 m total length) in the crocodyliform assemblage from Kuji, their diet probably included mid to large sized tetrapods, such as turtles and dinosaurs.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"176 ","pages":"Article 106197"},"PeriodicalIF":1.9,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144605456","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 new armored crocodyliform from the Upper Cretaceous of Catalonia (Spain): new insight into the evolution of the eusuchian postcranial and dermal skeleton 西班牙加泰隆尼亚上白垩纪新发现的一种带甲鳄鱼形：对尤苏奇动物颅后和真皮骨骼进化的新认识

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2025-12-01 Epub Date: 2025-06-06 DOI: 10.1016/j.cretres.2025.106178

Francesco Della Giustina , Riccardo Rocchi , Bernat Vila

{"title":"A new armored crocodyliform from the Upper Cretaceous of Catalonia (Spain): new insight into the evolution of the eusuchian postcranial and dermal skeleton","authors":"Francesco Della Giustina , Riccardo Rocchi , Bernat Vila","doi":"10.1016/j.cretres.2025.106178","DOIUrl":"10.1016/j.cretres.2025.106178","url":null,"abstract":"<div><div>The origin and early radiation of Crocodylia have shifted attention to the Upper Cretaceous of Europe, where numerous new taxa have recently been discovered. Particularly abundant are the remains associated with allodaposuchids, a controversial and recently established eusuchian clade whose postcranial record is rarely documented. Here, we describe a new allodaposuchid specimen from the Fontllonga-6 fossil locality (Àger Basin, NE Spain) in the Fontllonga Group (lower upper Maastrichtian). The specimen consists of cranial, postcranial, and dermal skeleton remains, making it the most complete crocodyliform from the Upper Cretaceous of Europe. It exhibits massive vertebrae and a large ribcage, while the numerous recovered osteoderms show diverse morphologies, providing insight into their position within the dermal skeleton. It presents peculiar teeth ornamentation only observed in <em>Allodaposuchus palustris</em> in the Ibero-Armorican domain<em>.</em> However, confident taxonomic assignment remains challenging due to the lack of other diagnostic traits. Including anatomical information provided by the specimen in phylogenetic analyses underscores the significance of postcranial characters in reconstructing relationships within Eusuchia. This new finding fills a data gap in the postcranial anatomy of eusuchians and allodaposuchids, offering insights into the ecology of this successful clade from the Upper Cretaceous of Europe.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"176 ","pages":"Article 106178"},"PeriodicalIF":1.9,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144307230","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

Detrital zircon provenance of the Lower Cretaceous Shahezi Formation in the Songliao Basin, Northeast China: Insights from LA-ICP-MS U-Pb geochronology 松辽盆地下白垩统沙河子组碎屑锆石物源：LA-ICP-MS U-Pb年代学的启示

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2025-12-01 Epub Date: 2025-07-04 DOI: 10.1016/j.cretres.2025.106200

Xin Gao , Tiegang Li

{"title":"Detrital zircon provenance of the Lower Cretaceous Shahezi Formation in the Songliao Basin, Northeast China: Insights from LA-ICP-MS U-Pb geochronology","authors":"Xin Gao , Tiegang Li","doi":"10.1016/j.cretres.2025.106200","DOIUrl":"10.1016/j.cretres.2025.106200","url":null,"abstract":"<div><div>The Songliao Basin, located in northeastern China, is one of the largest continental rift basins in East Asia. It preserves a nearly complete record of Cretaceous continental sedimentary records, providing insights into paleoclimatic, geodynamical, and tectonic processes in terrestrial systems during the Cretaceous Period. The Lower Cretaceous Shahezi Formation, deposited during the syn-rift stage of the Songliao Basin, consists of thick sequences of terrestrial clastic sediments. However, the provenance of the sediments and tectonic background during the deposition of the Shahezi Formation remain poorly understood. This study utilises U–Pb geochronology of detrital zircons from six sandstone samples collected from the Shahezi Formation as part of the International Continental Drilling Project SK-2 borehole in the Songliao Basin. The zircon age distributions reveal three dominant age clusters: ∼128–113 Ma, ∼184–159 Ma, and ∼247–216 Ma, indicating that the primary sediment source remained stable throughout deposition. These results suggest that the northern Great Xing’an Range was a significant sediment source, contributing to the Shahezi Formation at approximately 118–113 Ma.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"176 ","pages":"Article 106200"},"PeriodicalIF":1.9,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144633064","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 new theropod dinosaur lek in the Cretaceous Dakota Sandstone (Dinosaur Ridge, Colorado, USA) 美国科罗拉多州达科他砂岩（dinosaur Ridge, Colorado， USA）中一新的兽脚亚目恐龙化石

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2025-12-01 Epub Date: 2025-06-04 DOI: 10.1016/j.cretres.2025.106176

Rogers C.C. Buntin , Tom Moklestad , Neffra A. Matthews , Brent Breithaupt , Paul C. Murphey , Ian Kapinos , Nora Noffke

{"title":"A new theropod dinosaur lek in the Cretaceous Dakota Sandstone (Dinosaur Ridge, Colorado, USA)","authors":"Rogers C.C. Buntin , Tom Moklestad , Neffra A. Matthews , Brent Breithaupt , Paul C. Murphey , Ian Kapinos , Nora Noffke","doi":"10.1016/j.cretres.2025.106176","DOIUrl":"10.1016/j.cretres.2025.106176","url":null,"abstract":"<div><div>High-resolution aerial imagery captured by drones document new non-avian theropod mating display scrapes (<em>Ostendichnus</em>) along two stratigraphic levels of the Upper Cretaceous (Cenomanian) Dakota Sandstone at Dinosaur Ridge, Colorado, USA. We describe and identify their morphologies, orientations, and patterns of clustering that include overprinting. Twenty-five additional scrapes are documented on 2 stratigraphic surfaces (24 on surface 2b, colloquially the “Dinosaur Courtship” surface; and 1 on surface 2h). The additional scrapes on surface 2b elevates its status to a fossilized nest display arena or lek. Most of the scrapes have the diagnostic “bilobate” shape, but some are bowl-shaped consistent with the description of <em>Ostendichnus</em>-like traces and contain well-detectable toe claw marks in all but one of the structures. A new means to determine the direction the trace maker faced while creating the scrapes (azimuth) is proposed for <em>Ostendichnus</em> lacking footprints, anterior divergence of claw marks, posterior tapering of troughs, and a sand crescent pile of excavated sediment at the posterior of the trace. Analysis of the Dinosaur Ridge sites and of 3 previously known lek sites in western Colorado—Club Gulch (<em>n</em> = 2) and Roubideau Creek— permit insight into the social behavior of the trace making theropods by comparisons to modern avian analogs, particularly those of lekking, nest scrape display, a combined nest building and display activity, and nest building that involves digging, and― in some cases― reconfiguration using available materials.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"176 ","pages":"Article 106176"},"PeriodicalIF":1.9,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280325","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}

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