Cretaceous Research最新文献_第5页

Torreites milovanovici Grubić, 1979 in the Iranian Upper Cretaceous succession: Paleoenvironmental characteristics Torreites milovanovici Grubić, 1979 年，伊朗上白垩世演替：古环境特征

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2025-01-13 DOI: 10.1016/j.cretres.2025.106082

Mehdi Ghaedi

{"title":"Torreites milovanovici Grubić, 1979 in the Iranian Upper Cretaceous succession: Paleoenvironmental characteristics","authors":"Mehdi Ghaedi","doi":"10.1016/j.cretres.2025.106082","DOIUrl":"10.1016/j.cretres.2025.106082","url":null,"abstract":"<div><div>Genus <em>Torreites</em> shows different features in comparison to other types of rudists, making them important to interpret paleoenvironmental circumstances. In the study area which is located north of Shiraz (Zagros Basin, Interior Fars) (i.e. the northwesternmost section of <em>Torreites</em>-bearing sections of the Middle East) about 40 specimens from the Iranian section were analyzed to interpret the paleoecological characteristics of the Campanian monospecific layer. At first sight, their morphotypes reveal the substrate, hydrodynamic energy, and other factors. Except for a limited number of specimens, they predominantly function as elevators, indicating a relatively quiet surrounding environment. There are minor organisms, including corals, gastropods, sponges, other non-rudist bivalve groups, and polychaeta, helping for more precise interpretations. The <em>Torreites</em>-bearing carbonate layer is situated on a soft shaly and marly siliciclastic bed, and other organisms colonized a considerable proportion of the surface of <em>Torreites</em> specimens. As they are photosymbiont-bearing bivalves, they may play a significant role in interpreting environmental characteristics such as trophic conditions. In addition, as surface bioerosion increases in response to elevated nutrient levels, the prevailing trophic condition is supposed to be oligotrophic to mesotrophic. Also, based on marine constituents, and previous studies, the studied interval must be deposited in a tropical environment. Based on various interpretations, hydrodynamic energy has transitioned from low to moderate levels. Besides, bioerosion rates observed on different sides and coupled specimens imply that <em>Torreites</em> samples should have preferred directions.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"169 ","pages":"Article 106082"},"PeriodicalIF":1.9,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182273","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

Multiple lines of evidence support anagenesis in Daspletosaurus and cladogenesis in derived tyrannosaurines 多种证据支持水龙的发育和派生的暴龙的枝发育

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2025-01-11 DOI: 10.1016/j.cretres.2025.106080

Charlie Roger Scherer

{"title":"Multiple lines of evidence support anagenesis in Daspletosaurus and cladogenesis in derived tyrannosaurines","authors":"Charlie Roger Scherer","doi":"10.1016/j.cretres.2025.106080","DOIUrl":"10.1016/j.cretres.2025.106080","url":null,"abstract":"<div><div>Tyrannosaurines were the dominant predators of Laramidian ecosystems during the Late Cretaceous. An anagenetic hypothesis for the evolution of derived tyrannosaurines in Laramidia has received considerable attention in recent years, although studies disagree on the degree of anagenetic and cladogenetic evolution driving tyrannosaurine evolution. These studies have relied on phylogenetic results of equal weights parsimony analysis and do not consider the impact of alternative phylogenetic methodologies. Here, I build on previous work by applying maximum likelihood Bayesian inference and Extended Implied Weights parsimony analyses to competing datasets and show that both of these methods provide additional support for anagenetic evolution in tyrannosaurines. In species-level and specimen-level analyses, species of the Campanian taxon <em>Daspletosaurus</em> form a paraphyletic grade of tyrannosaurines leading to Tyrannosaurini. However, <em>Daspletosaurus</em> is shown as a distinct lineage from Tyrannosaurini by using multiple lines of evidence including the geochronology and biogeography of tyrannosaurine specimens. A fully-resolved specimen-level topology allows for the application of species delimitation techniques and reveals potentially novel metaspecies of <em>Daspletosaurus</em>, although no new taxa are erected here as a conservative practice. Future detailed description of the specimens analysed by this contribution and previous work may provide justification for establishing novel <em>Daspletosaurus</em> metaspecies. Ongoing work in refining the phylogenetics of tyrannosauroids will also aid in elucidating the true mode of evolution in <em>Daspletosaurus</em>. This study underscores the importance of accounting for homoplasy in specimen-level analyses by differentially weighting homoplastic characters.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"169 ","pages":"Article 106080"},"PeriodicalIF":1.9,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143182274","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

Provenance evolution and drainage reorganization during tectonic inversion of a continental rift basin: Detrital zircon evidence from the Late Cretaceous Songliao Basin, NE China 陆相裂谷盆地构造反转期间物源演化与水系重组：松辽盆地晚白垩世碎屑锆石证据

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2025-01-09 DOI: 10.1016/j.cretres.2024.106077

Zhengxuan Wu , Yuan Gao , Dongzhao An , Liangliang Zhang , Mingang Hao , Yuyin Li

{"title":"Provenance evolution and drainage reorganization during tectonic inversion of a continental rift basin: Detrital zircon evidence from the Late Cretaceous Songliao Basin, NE China","authors":"Zhengxuan Wu , Yuan Gao , Dongzhao An , Liangliang Zhang , Mingang Hao , Yuyin Li","doi":"10.1016/j.cretres.2024.106077","DOIUrl":"10.1016/j.cretres.2024.106077","url":null,"abstract":"<div><div>Since the Mesozoic, Northeast Asia has been profoundly influenced by the complex interactions of multiple tectonic systems. In the Late Cretaceous, subduction of the Pacific Plate beneath the Eurasian continent has caused compression of previous extensional system, called tectonic inversion, and triggered shrinkage of continental basins, such as the Songliao Basin. However, the relationship between the source-sink system and drainage pattern evolution in the Songliao Basin during the tectonic inversion period remains to be further studied, particularly in the late stage of the tectonic inversion, where the source-sink system lacks constraints from detrital zircon data. Based on the core obtained through the International Continental Scientific Drilling Project of the Songliao Basin, this study conducted U–Pb dating of the detrital zircons in the latest Cretaceous (∼70 Ma) Mingshui Formation. The zircon U–Pb data indicate that the most significant age peaks are 100 Ma, 170 Ma, and 267 Ma, while the relatively significant intervals include 220–230 Ma and 1799–1999 Ma. By comparing with the provenance areas, it is found that the provenance of the latest Cretaceous Songliao Basin, which belongs to the tectonic inversion stage, is distinctly different from that of the early Late Cretaceous post-rift stage. This significant change in the provenance system is attributed to the increased subduction rate of the Pacific plate and the shift in subduction direction since ∼84 Ma, which led to uplift and erosion in the southeastern part of the basin and consequently impacted the source-sink system of the basin.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"168 ","pages":"Article 106077"},"PeriodicalIF":1.9,"publicationDate":"2025-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143180238","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

Application of Ostracoda from the Lower Cretaceous Liupanshan group at Pingliang (NW China) – Biostratigraphy and palaeoecology 平凉下白垩统六盘山群介形类的应用——生物地层学与古生态学

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2025-01-08 DOI: 10.1016/j.cretres.2025.106079

Yaqiong Wang , Byung-Do Choi , Robin J. Smith , Deyan Wu

{"title":"Application of Ostracoda from the Lower Cretaceous Liupanshan group at Pingliang (NW China) – Biostratigraphy and palaeoecology","authors":"Yaqiong Wang , Byung-Do Choi , Robin J. Smith , Deyan Wu","doi":"10.1016/j.cretres.2025.106079","DOIUrl":"10.1016/j.cretres.2025.106079","url":null,"abstract":"<div><div>The ostracod fauna from the Liwaxia and Madongshan formations in the Pingliang area of the Liupanshan Basin are investigated in this study. Dominated by <em>Liupanshania typica</em> and <em>Lycopterocypris infantilis</em>, the fauna also includes <em>Ziziphocypris costata</em>, <em>Bisulcocypridea gaodianensis</em>, <em>Cypridea astuta</em>, <em>C. puncticulata</em>, <em>Mongolocypris liupanshanensis</em>, and <em>Limnocythere</em> sp. Our biostratigraphic analysis constrains the age of the Liwaxia Formation to Aptian to Albian and the Madongshan Formation to the Albian. These biostratigraphic findings facilitate the correlation of ostracods from the Liupanshan Group with contemporaneous faunas from adjacent basins in China and Mongolia, supporting the hypothesis of invertebrate faunal exchange within East Asia during the Early Cretaceous. Furthermore, the endemic genus <em>Liupanshania</em> is reassigned to the family Notodromadidae and subfamily Cyproidinae, based on the presence of anterior and posterior striated flanges. A significant radiation of Cyproidinae even Notodromadidae, occurred in Eurasia during the Barremian to Albian. Palaeoecologically, the dominance of the ostracod <em>Liupanshania</em> and its co-occurrence with stromatolites in the Pingliang area of the Liupanshan Basin suggest the presence of a saline lake under evaporative, arid climatic conditions.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"168 ","pages":"Article 106079"},"PeriodicalIF":1.9,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143180237","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

Turonian carbonate succession in central-southern Tunisia: Insights into depositional environments, sequence stratigraphy and south Tethyan margin correlations 突尼斯中南部的Turonian - carbonate succession：对沉积环境、层序地层学和南特提斯边缘对比的认识

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2024-12-28 DOI: 10.1016/j.cretres.2024.106074

Dhouha Jomaa Salmouna , Najeh Ben Chaabane , Ferid Dhahri , Abdellatif Salmouna

{"title":"Turonian carbonate succession in central-southern Tunisia: Insights into depositional environments, sequence stratigraphy and south Tethyan margin correlations","authors":"Dhouha Jomaa Salmouna , Najeh Ben Chaabane , Ferid Dhahri , Abdellatif Salmouna","doi":"10.1016/j.cretres.2024.106074","DOIUrl":"10.1016/j.cretres.2024.106074","url":null,"abstract":"<div><div>New sedimentological studies and sequence stratigraphic framework of the Turonian deposits, in Tunisia, were conducted to facilitate the reading of the local stratigraphic nomenclature by comparing it with the global stratigraphic data. A new sequence stratigraphic subdivision of the Turonian interval has been proposed, based on the lithological and paleontological characteristics from Berda, Chemsi, Orbata and Belkhir sections (Gafsa area).</div><div>A detailed sedimentological investigation of the Bireno carbonates, correlated later on with other sections (northern Chotts, Sidi Bouzid, and Kasserine areas), has allowed to recognize three facies associations. They are distributed along a ramp system, evolving from proximal to distal domain and highlighting a northward deepening, well evidenced by isopach and paleogeographic maps.</div><div>Four 3rd order sequences (S-1 to S-4) have been identified; they correspond to the Bahloul Formation (lowest Turonian), the Gattar and Annaba Members (lower Turonian), the Bireno Member (lower Turonian to upper Turonian), and the Lower Aleg Member (uppermost Turonian). The most transgressive intervals correspond to the Bahloul Formation (mfs1), the Annaba Member (mfs2) and the upper B2 unit (mfs3).</div><div>The regressive ones correspond to the Gattar member, B1, B3 and B4 units. This subdivision has allowed the tracing of reasonable timelines and the correlation of the Tunisian Turonian deposits with their analogues in the southern Tethyan margin.</div><div>This study will significantly help to improve the conception of stratigraphic architecture and the depositional morphology at the scale of the southern Tethyan margin.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"168 ","pages":"Article 106074"},"PeriodicalIF":1.9,"publicationDate":"2024-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143180236","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

First dinosaur ichnofauna from the Bauru Group indicates Cenomanian–Turonian events led to an ‘Ornithischian Hiatus’ in the Upper Cretaceous of Southeast Brazil 来自包鲁群的首个恐龙化石群表明，仙人-土伦事件导致了巴西东南部上白垩世的 "鸟臀目断代 "现象

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2024-12-28 DOI: 10.1016/j.cretres.2024.106075

Bruno A. Navarro , Ariovaldo A. Giaretta , Marcelo A. Fernandes , Alberto B. Carvalho , Hussam Zaher

{"title":"First dinosaur ichnofauna from the Bauru Group indicates Cenomanian–Turonian events led to an ‘Ornithischian Hiatus’ in the Upper Cretaceous of Southeast Brazil","authors":"Bruno A. Navarro , Ariovaldo A. Giaretta , Marcelo A. Fernandes , Alberto B. Carvalho , Hussam Zaher","doi":"10.1016/j.cretres.2024.106075","DOIUrl":"10.1016/j.cretres.2024.106075","url":null,"abstract":"<div><div>The Cenomanian–Turonian interval represents a critical period of faunal change during the Late Cretaceous. Although the main causes of this turnover are contentious, it is undeniable that these global events significantly influenced the last stages of dinosaur evolution. The Bauru Group in southeastern Brazil is known for its rich body-fossil record of crocodyliform and dinosaur remains, representing a key geological unit for understanding the evolution of continental biotas in the Upper Cretaceous of Gondwana. However, the ichnological record in these units are scarce, primarily consisting of invertebrate burrows and rare tetrapod traces. This study focuses on the newly discovered tracksite within the Cenomanian–Turonian Santo Anastácio Formation, marking the first dinosaur ichnofauna identified in the Bauru Group. The new ichnocoenosis includes four theropod morphotypes, a quadrupedal and a small bipedal ornithischian, bipedal and graviportal ornithopods, and a small, narrow-gauged sauropod trackmaker. These tracks provide new insights into the dinosaur faunas during the Cenomanian–Turonian interval and highlight the existence of clades not previously identified in the Bauru Group, particularly ornithischians. The absence of body fossils of these taxa in the younger strata of the Bauru Group indicates that the successive environmental fluctuations during the Cenomanian–Turonian may have been responsible for regional extinctions or migration of these animals to higher latitudes. This ecological shift might have allowed specialized crocodyliforms like sphagesaurians to fill the niches left by small herbivorous dinosaurs in the Bauru Group, while titanosaurians dominate the medium-to-large herbivore roles in these ancient ecosystems.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"168 ","pages":"Article 106075"},"PeriodicalIF":1.9,"publicationDate":"2024-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143181580","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 widely distributed upper Aptian shallow-marine tsunami deposit in the Miyako Group, northeast Japan 日本东北部宫古群中广泛分布的上阿普天浅海海啸沉积

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2024-12-27 DOI: 10.1016/j.cretres.2024.106073

Shigehiro Fujino , Haruyoshi Maeda

{"title":"A widely distributed upper Aptian shallow-marine tsunami deposit in the Miyako Group, northeast Japan","authors":"Shigehiro Fujino , Haruyoshi Maeda","doi":"10.1016/j.cretres.2024.106073","DOIUrl":"10.1016/j.cretres.2024.106073","url":null,"abstract":"<div><div>We report a newly discovered characteristic event deposit of late Aptian age in the Tanohata Formation of the Lower Cretaceous Miyako Group in northeast Japan. The event deposit is 1.5–5.5 m thick and contains internal erosional surfaces that divide the event deposit into multiple sub-layers. Sigmoidal cross-stratification, which is often formed under hydraulic conditions transitional between upper and lower flow regimes, was observed at the top of the deposit. The event deposit lies on an erosional surface cut approximately 4 m into the underlying strata and contains sand rip-up clasts of underlying strata. The presence of sand rip-up clasts reflects the powerful effect of this event on the shallow seafloor, which caused erosion of the cemented substrate and generated boulder-size clasts. On the basis of these sedimentological features, we interpret the event deposit as a tsunami deposit. A previous study reported a tsunami deposit about 20 km away from this study site at exactly the same lithostratigraphic horizon as the tsunami deposit reported in this study. The fact that tsunami deposits were found at the same stratigraphic horizon in two distant areas indicate that sediment transport and deposition by the tsunami was substantial and extensive. We hypothesize that other deposits formed by the same tsunami may be present in other upper Aptian strata across the western Pacific region.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"168 ","pages":"Article 106073"},"PeriodicalIF":1.9,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143181846","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 first record of a predaceous clerid beetle (Coleoptera: Cleridae) from the Cretaceous Taimyr amber 白垩纪泰米尔琥珀中首次发现一种掠食性甲虫（鞘翅目：甲虫科）

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2024-12-26 DOI: 10.1016/j.cretres.2024.106076

Jiří Kolibáč , Evgeny E. Perkovsky

{"title":"The first record of a predaceous clerid beetle (Coleoptera: Cleridae) from the Cretaceous Taimyr amber","authors":"Jiří Kolibáč , Evgeny E. Perkovsky","doi":"10.1016/j.cretres.2024.106076","DOIUrl":"10.1016/j.cretres.2024.106076","url":null,"abstract":"<div><div>Cleroid beetle <em>A</em><em>iy</em><em>tillus agapensis</em> gen. et sp. nov. is described from upper Cenomanian Taimyr amber. This is the first finding of a predatory checkered beetle (Cleridae) in the Cretaceous. Based on the tarsi with equally large tarsomeres 1–4, the fossil is unambiguously assigned to the basal clerid subfamily Tillinae. The fossil was found near the Nizhnyaya Agapa River in the upper horizon of the Dolgan Formation during an expedition in 1973. Although damaged by improper preservation, the fossil exhibits a number of interesting morphological details including extremely small body (less than 3 mm), long serrated antenna, pretarsal claw with denticle, and comb-like protibial structures. The unusually long antenna together with the aforementioned morphological characters resembles another small tilline fossil <em>Bilbotillus glum</em> Kolibáč from Baltic Amber, although the latter is about 60 My younger. The presence of modern looking clerids in the Middle Jurassic of NE China as well as in Taimyr and Baltic ambers, and conversely their absence in burmite, may indicate the origin of the family in temperate rather than tropical conditions.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"168 ","pages":"Article 106076"},"PeriodicalIF":1.9,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143181847","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

Theropod teeth from the Upper Cretaceous of central Spain: Assessing the paleobiogeographic history of European abelisaurids 西班牙中部上白垩纪兽脚亚目恐龙牙齿：评估欧洲阿贝利龙的古生物地理历史

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2024-12-20 DOI: 10.1016/j.cretres.2024.106072

Elisabete Malafaia , Fernando Escaso , Rodolfo A. Coria , Adán Pérez-García , Francisco Ortega

{"title":"Theropod teeth from the Upper Cretaceous of central Spain: Assessing the paleobiogeographic history of European abelisaurids","authors":"Elisabete Malafaia , Fernando Escaso , Rodolfo A. Coria , Adán Pérez-García , Francisco Ortega","doi":"10.1016/j.cretres.2024.106072","DOIUrl":"10.1016/j.cretres.2024.106072","url":null,"abstract":"<div><div>The upper Campanian–lower Maastrichtian site of Poyos (Guadalajara, Spain) has yielded an abundant fossil record of reptiles, including several cranial and postcranial elements of theropod dinosaurs. Here we present a study, based on statistical and cladistic analyses as well as on detailed description, of a sample of isolated theropod teeth collected from this site. The sample comprises twenty relatively complete and well-preserved tooth crowns, belonging to mesial and lateral teeth. The combination of morphological and morphometric features is consistent with the identification of these specimens as belonging to a medium-sized abelisaurid theropod. These specimens resemble the teeth associated with the holotype of <em>Arcovenator escotae</em> (upper Campanian of France) and some isolated teeth assigned to <em>Arcovenator</em> sp. from different temporal correlative localities of Spain. These similarities suggest the presence of an abelisaurid closely related to <em>Arcovenator</em> in Poyos, expanding the fossil record of this lineage of abelisaurids to the upper Campanian-lower Maastrichtian in the Iberian Peninsula. The currently known fossil record shows that abelisaurids were one of the most abundant groups of non-coelurosaurian theropods in the Upper Cretaceous of Europe and possibly the only medium-to large-size carnivorous dinosaurs in the Ibero-Armorican realm from the upper Cenomanian to the upper Maastrichtian. The increasing abundance of abelisaurids during the Late Cretaceous and the vanishing of other large theropods that dominated the Early Cretaceous faunas of Ibero-Armorica seem to be part of a faunistic turnover that can be related to a climate change to semi-arid conditions.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"168 ","pages":"Article 106072"},"PeriodicalIF":1.9,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143181581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Youngest fossil occurrence of ichthyosaurs from the Southern Hemisphere 南半球最年轻的鱼龙化石

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2024-12-18 DOI: 10.1016/j.cretres.2024.106071

Rhys D. Meyerkort , Benjamin P. Kear , Michael J. Everhart , Mikael Siversson

引用次数: 0