Cretaceous Research最新文献_第3页

Integrated astrochronology, isotope and biostratigraphy of the Albian-Cenomanian transition and expression of the OAE 1d in an expanded record of a rapidly subsiding Tethyan synorogenic basin (Core Jásd-42, Transdanubian range, Hungary) 快速沉降特提斯同造盆地扩展记录中Albian-Cenomanian过渡的综合天文年代学、同位素和生物地表学及OAE 1d的表达（核心Jásd-42，跨多瑙河山脉，匈牙利）

IF 1.7 3区地球科学 Q1 GEOLOGY

Cretaceous Research

Pub Date : 2026-05-01 Epub Date: 2026-01-07 DOI: 10.1016/j.cretres.2025.106311

Zsolt Vallner , Tamás Müller , Dávid Bajnai , Ottilia Szives , Lajos Ádám Csicsek , Gábor Héja , Bernát Heszler , Norbert Zajzon , József Pálfy

The OAE 1d is one of the oceanic anoxic events that punctuate the Cretaceous and represent Earth system-wide changes prominently captured by carbon isotope excursions (CIE). Although the positive CIE near the Albian/Cenomanian boundary (ACB) is known from multiple localities, many of these records disagree in the shape of the δ¹³C curve. Interpretations of OAE 1d and a broader ACB Event (ACBE) remain ambiguous, and their duration is insufficiently constrained. Here we present new analyses on high-resolution samples from Core Jásd-42. The >450 m thick Pénzeskút Marl Fm. provides an expanded record across the ACBE. We generated elemental and stable isotope geochemical data and used these time series for cyclostratigraphic analyses. The derived astrochronologic age model establishes a depositional duration of 4.4–4.83 Myr and is integrated with ammonite and planktonic foraminifera biostratigraphy. This high-resolution chemostratigraphy provides a new, calibrated record of OAE 1d and the ACBE that we correlate with other reference sections, including the GSSP. A minimum estimate of 1.23 Myr and 2.28 Myr is obtained for OAE 1d and the ACBE, respectively. For the latter, a minimum of 602 kyr is assigned to the rising limb, 748 kyr to the culminating interval, and 931 kyr to the falling limb in the δ¹³C_carb curve. The δ¹³C record through OAE 1d appears orbitally controlled, where the positive peaks are paced by long eccentricity. Considering the differences between seasonality extremes, we suggest a model for depositional cyclicity in a synorogenic basin with a high sedimentation rate of 9–15 cm/kyr.

OAE 1d是白垩纪期间的海洋缺氧事件之一，代表了由碳同位素漂移（CIE）显著捕获的地球系统范围的变化。虽然在Albian/Cenomanian边界（ACB）附近的正CIE从多个位置已知，但这些记录中的许多δ13C曲线的形状不一致。对OAE 1d和更广泛的ACB事件（ACBE）的解释仍然不明确，它们的持续时间也没有足够的限制。在这里，我们对来自核心Jásd-42的高分辨率样本进行了新的分析。450米厚Pénzeskút沼泽Fm。提供跨ACBE的扩展记录。我们生成了元素和稳定同位素地球化学数据，并使用这些时间序列进行旋回地层分析。建立的星象年代学模型建立了4.4 ~ 4.83 Myr的沉积时间，并结合了鹦鹉螺和浮游有孔虫生物地层。这种高分辨率的化学地层学提供了一种新的、校准的OAE 1d和ACBE记录，我们将其与其他参考剖面（包括GSSP）相关联。OAE 1d和ACBE的最小估计值分别为1.23和2.28马币。对于后者，δ13Ccarb曲线上升段最小值为602 kyr，峰值段最小值为748 kyr，下降段最小值为931 kyr。通过OAE 1d的δ13C记录显示出轨道控制，其中正峰以长偏心率为节奏。考虑到季节极值之间的差异，我们提出了一个高沉积速率为9-15 cm/kyr的同造盆地沉积旋回模型。

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引用次数: 0

Reply to comment made by Suarez-Gonzalez et al. on “Latest Jurassic-Early Cretaceous synrift evolution of the Torrelapaja Subbasin (Cameros Basin): Implications for Northeast Iberia palaeogeography” by Aurell et al. (Cretaceous Research 128 (2021) 104997) 回复Suarez-Gonzalez等人对Aurell等人“Torrelapaja次盆地（Cameros盆地）的晚侏罗世-早白垩世syng裂化演化：对伊比利亚东北古地理的启示”的评论（白垩纪研究128 (2021)104997）

IF 1.7 3区地球科学 Q1 GEOLOGY

Cretaceous Research

Pub Date : 2026-05-01 Epub Date: 2025-11-27 DOI: 10.1016/j.cretres.2025.106274

Marcos Aurell , Beatriz Bádenas , Diego Castanera , José M. Gasca , José I. Canudo , Elisa Laita , Carlos L. Liesa

Aurell et al. (2021) documented the Tithonian-Albian evolution of the Torrelapaja Subbasin (Cameros Basin, Spain) by defining three synrift sequences (SS), and highlighting new paleogeographic implications for northeast Iberia. The comment by Suarez-Gonzalez et al. (2025) expresses concern that our work challenges several established assumptions and interpretations by their research group. This Reply systematically addresses the three main points of scientific controversy raised in that comment: (1) The correlation between the Torrelapaja Formation (SS-2) and the Enciso Group of the Hauterivian-Barremian, further supported by recent cyclostratigraphic results that contradict the traditionally accepted Aptian age; (2) The mid-Albian age of the oyster-rich beds of the Torrelapaja Subbbasin (SS-3) and its assignment to the Escucha Formation, an interpretation consistent with regional stratigraphic and structural data; (3) The only northern source to explain the marine incursions in the Torrelapaja Subbasin, which best fits the facies distribution observed in the northern marginal zones of the Maestrazgo Basin during the Aptian-Albian. In particular, we show that the alternative proposal of a seaway connecting the Cameros and Maestrazgo basins during the early Aptian emphasized in Suarez-Gonzalez et al. (2025) is not supported by the available data.

Aurell等人（2021）通过定义三个共裂谷序列（SS）记录了Torrelapaja次盆地（西班牙Cameros盆地）的Tithonian-Albian演化，并强调了伊比利亚东北部新的古地理意义。Suarez-Gonzalez等人（2025）的评论表达了他们的担忧，认为我们的工作挑战了他们研究小组的几个既定假设和解释。本答复系统地解决了该评论中提出的科学争议的三个主要问题：(1)Torrelapaja组（SS-2）与Hauterivian-Barremian的Enciso群之间的相关性，最近的旋回地层结果进一步支持了这一相关性，该相关性与传统上接受的Aptian年龄相矛盾；(2) Torrelapaja亚盆地（SS-3）富牡蛎层的中阿尔别世时代及其归属于Escucha组，这一解释与区域地层和构造资料一致；(3)是解释Torrelapaja次盆地海相入侵的唯一北部物源，与马埃斯特拉兹戈盆地北缘在阿普提亚-阿尔比安时期观测到的相分布最为吻合。特别是，我们表明Suarez-Gonzalez等人（2025）所强调的在阿普tian早期建立一条连接Cameros和Maestrazgo盆地的海道的替代建议没有得到现有数据的支持。

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引用次数: 0

Paleoenvironmental evolution and Tethyan transgression during the Valanginian: Insights from the Tonalá and San Miguel Papalutla Formations, Tlaxiaco Basin, Mexico 瓦兰吉尼亚期古环境演化与特提斯海侵：来自墨西哥特拉西科盆地tonal<e:1>组和San Miguel Papalutla组的启示

IF 1.7 3区地球科学 Q1 GEOLOGY

Cretaceous Research

Pub Date : 2026-05-01 Epub Date: 2025-12-10 DOI: 10.1016/j.cretres.2025.106293

Salatiel Díaz-Lara , Claudia Cristina Mendoza-Rosales , Gilberto Silva-Romo , Josep Anton Moreno-Bedmar , Miquel Company , Orestes Antonio de la Rosa-Mora

The Tlaxiaco Basin, located in southern Mexico within the Mixteca Terrane, preserves one of the most complete records of the breakup of Pangea. While its Jurassic units have been extensively studied in the context of rifting, this study focuses on the overlying Lower Cretaceous sedimentary succession, corresponding to the newly defined Tonalá Formation and the San Miguel Papalutla Formation.

Through facies and microfacies analysis, gamma-ray spectroscopy, detrital zircon geochronology, and ammonite biostratigraphy, we reconstruct the paleoenvironmental evolution and sea-level fluctuations in the Tlaxiaco Basin during the Early Cretaceous. These formations document a transition from a carbonate platform to deeper marine basin environments, allowing for the precise identification of facies shifts associated with marine transgression events.

One such transgression, recorded within the Neocomites neocomiensiformis ammonite Zone, correlates with the global third-order sequence KVa2 and reflects a Tethyan affinity. Sedimentological and U–Th geochemical data suggest warm, humid to tropical climatic conditions in the Tlaxiaco Bay during the Valanginian. The development of both formations occurred during a phase of thermal subsidence, resulting in a transgressive depositional pattern influenced by marine currents from the Tethys Sea.

This refined stratigraphic and paleoenvironmental framework supports the interpretation of the Tlaxiaco Basin as a passive-margin system, contributing to broader models of Early Cretaceous eustatic dynamics and continental margin evolution.

特拉西亚科盆地位于墨西哥南部的米斯特卡地体内，保存着盘古大陆分裂最完整的记录之一。虽然在裂谷作用背景下对其侏罗纪单元进行了广泛的研究，但本次研究的重点是上覆的下白垩统沉积演替，对应于新定义的tonal组和San Miguel Papalutla组。通过相微相分析、伽玛能谱、碎屑锆石年代学、鹦鹉螺生物地层学等方法，重建了早白垩世特拉斯夏古盆地的古环境演化和海平面波动。这些地层记录了从碳酸盐岩台地到更深的海相盆地环境的转变，从而可以精确识别与海侵事件相关的相转变。其中一次海侵记录在新奥氏统新奥氏统鹦鹉螺岩带内，与全球三级层序KVa2有关，具有特提斯亲缘关系。沉积学和U-Th地球化学数据表明，在瓦兰吉尼亚时期，特拉西亚科湾的气候条件是温暖、潮湿到热带的。这两个地层的发育都发生在热沉降阶段，形成了受特提斯海海流影响的海侵沉积模式。这一精细的地层和古环境格架支持了对特拉斯夏古盆地作为被动边缘系统的解释，有助于建立更广泛的早白垩世上升动力学和大陆边缘演化模式。

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引用次数: 0

Upper Cretaceous flora of the Gosau Group of Kainach, Styria, Austria 奥地利施蒂里亚Kainach地区Gosau群的上白垩纪植物区系

IF 1.7 3区地球科学 Q1 GEOLOGY

Cretaceous Research

Pub Date : 2026-04-01 Epub Date: 2025-12-31 DOI: 10.1016/j.cretres.2025.106310

Jiří Kvaček , Fritz Messner , Franz Bernhard

Upper Cretaceous flora (upper Santonian - lower Campanian) is described from the Kainach Gosau Group sediments in Styria, Austria, in the Central Eastern Alps. The flora is associated with thin coal seams. It consists of angiosperms dominated by monocotyledon foliage Pandanites trinervis, which is typical for coal-bearing strata of Gosau. The second most abundant angiosperm foliage in the locality of Geistthal is platanoid foliage Ettingshausenia geistthalensis sp. nov. Twelve dicotyledon leaves are described from the area of Kainach Gosau, including three new species Juglandiphyllites kainachensis sp. nov., J. graefii sp. nov. and J. roemaskogelensis sp. nov. Ferns and conifers (Geinitzia reichenbachii) are present, but in a distinct minority. The preserved flora is interpreted as vegetation of three types: 1) alluvial plain vegetation dominated by platanoids, 2) coal swamp vegetation dominated by pandanoids, 3) upland vegetation dominated by probable juglandoids. The terrestrial vegetation grew on the tectonically driven orogenic island, a part of the Adriatic Plate, in the northern part of the Tethys Sea. The massive occurrence of the Pandanites monocot is important not only as a palaeoecological indicator, but also for phytogeographical interpretations. As a thermophilous plant, it was tectonically delivered from the African coast to the southern coast of Europe by tectonic plate movement.

在阿尔卑斯山中东部奥地利施蒂里亚的Kainach Gosau群沉积物中描述了上白垩纪植物区系（上圣东纪-下坎帕纪）。该植物群与薄煤层有关。它由被子植物组成，以单子叶叶的三棱蕨为主，是戈索煤系地层的典型植物。盖斯塔地区第二丰富的被子植物叶片是平叶类植物Ettingshausenia geistthalensis sp. 11 . 11 .在盖纳奇古索地区发现了12片双子叶，包括3个新种Juglandiphyllites kainachensis sp. nov.、J. graefii sp. nov.和J. roemaskogelensis sp. 11 . 11 .蕨类植物和针叶树（Geinitzia reichenbachii），但明显占少数。保存的植物区系可划分为3种植被类型：1)以高原类植物为主的冲积平原植被，2)以熊猫类植物为主的煤沼泽植被，3)以可能的核桃类植物为主的高地植被。陆地植被生长在构造驱动的造山岛上，是亚得里亚海板块的一部分，位于特提斯海北部。单斑岩的大量出现不仅是一个重要的古生态指标，而且对植物地理解释具有重要意义。作为一种嗜热植物，它是通过构造板块运动从非洲海岸转移到欧洲南部海岸的。

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引用次数: 0

Late Albian floras of eastern Iberia: Insights into the palaeoenvironments and palaeoecology of fossil plant communities associated with amber-bearing sedimentary successions 伊比利亚东部的晚阿尔巴尼亚植物群：与含琥珀沉积演替有关的化石植物群落的古环境和古生态的见解

IF 1.7 3区地球科学 Q1 GEOLOGY

Cretaceous Research

Pub Date : 2026-04-01 Epub Date: 2025-12-27 DOI: 10.1016/j.cretres.2025.106308

Carlos A. Bueno-Cebollada , Jiří Kvaček , Eduardo Barrón

Late Albian floras from eastern Iberia are mainly dominated by conifers with xeromorphic adaptations and include well-diversified fern and angiosperm communities. Some of these coniferous taxa are believed to be related to a global mass resin production period known as the Cretaceous Resin Interval (CREI), which ultimately led to the development of amber sites.

This research presents a study of late Albian macro- and mesofloras of eastern Iberia from descriptive, palaeoecological, and palaeoclimatological perspectives. The studied material was collected from four outcrops: the Cañada del Hoyo outcrop, located in the Cuenca Basin; and the Arroyo de la Pascueta, Cortes de Arenoso, and San Just outcrops, located in the Maestrazgo Basin. The collected taxa were grouped into four palaeoecological associations (PA-1 to PA-4), representing different biocoenoses from the coastline to the hinterland: Supra-to intertidal vegetal communities (PA-1), Nearshore woodlands with Araucariaceae (PA-2), Drought-adapted hinterland vegetation (PA-3), and Local riparian vegetal communities (PA-4). The dominance of taxa assigned to the genera Frenelopsis, Dammarites, and Eretmophyllum indicates that most of the assemblages are related to supratidal plant communities, a typical feature of the mid-Cretaceous Tethyan coast.

Furthermore, we reinforce the hypothesis of an Araucariaceae affinity for some of the upper Albian amber of the Maestrazgo Basin based on the presence of Brachyphyllum cf. obesum Heer (1881) and Rabagostrobus cf. hispanicus Kvaček et al. (2018). We also relate the lack of upper Albian amber-bearing strata in the Cuenca Basin to the sedimentary environment dynamics rather than to the nature of the palaeobotanical assemblages.

来自伊比利亚东部的晚阿尔巴尼亚植物区系主要以适应旱形的针叶树为主，包括多样化的蕨类和被子植物群落。其中一些针叶分类群被认为与白垩纪树脂间隔（CREI）的全球大规模树脂生产时期有关，该时期最终导致了琥珀遗址的发展。本研究从描述、古生态和古气候学的角度对伊比利亚东部的晚阿尔巴尼亚宏观和中型植物区系进行了研究。研究材料收集自四个露头：位于昆卡盆地的Cañada del Hoyo露头；以及位于Maestrazgo盆地的Arroyo de la Pascueta、Cortes de arennoso和San Just露头。将收集到的分类群划分为4个古生态群落（PA-1 ~ PA-4），代表了从海岸线到内陆不同的生物群落：超潮至潮间带植被群落（PA-1）、近岸带龙葵科林地（PA-2）、适应干旱的内陆植被群落（PA-3）和当地河岸植被群落（PA-4）。其中，Frenelopsis属、Dammarites属和Eretmophyllum属占主导地位，表明大多数组合与潮上植物群落有关，这是中白垩世特提斯海岸的典型特征。此外，基于Brachyphyllum cf. obesum Heer（1881）和Rabagostrobus cf. hispanicus kva eket al.（2018）的存在，我们加强了Araucariaceae与Maestrazgo盆地上部Albian琥珀的亲和性假设。我们还将昆卡盆地上亚系琥珀地层的缺乏与沉积环境动力学联系起来，而不是与古植物组合的性质有关。

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引用次数: 0

A new upper Cretaceous bramble shark from central Chile reveals austral diversity among Weddellian echinorhinids 在智利中部发现的一种新发现的上白垩纪黑刺鲨揭示了威德尔棘爪类动物在南方的多样性

IF 1.7 3区地球科学 Q1 GEOLOGY

Cretaceous Research

Pub Date : 2026-04-01 Epub Date: 2025-12-31 DOI: 10.1016/j.cretres.2025.106309

Rodrigo A. Otero , Sergio Soto-Acuña , Raúl Ugalde , Patricio Sepúlveda , Alexander O. Vargas , Guillermo Aguirrezabala , Héctor Ortiz

Teeth of bramble sharks (Echinorhinidae) are one of the scarcest chondrichthyan elements reported to date in the Upper Cretaceous of central Chile and in general, South America. Prior to this research, its local record was restricted to only four available specimens, previously considered to be equivalent to teeth from the upper Maastrichtian of Argentinean Patagonia, being these referred to the species Echinorhinus maremagnum. This contribution presents two new elements, including the first complete large tooth from central Chile, showing the presence of a distally projected basal cusplet and a complex mesial, serrated cutting edge with the primordium of two clear cusplets, this last being a trait commonly present in several Cenozoic species. These new features remained unnoticed in the previous material from central Chile, either due to informative portions missing or the immature growth stage of the smaller known sample. The dental features of the new specimen are unique among known species of the genus Echinorhinus; moreover, the crown traits represent an ancestral condition with respect to those features commonly present in Cenozoic species. With the new evidence, all the known Echinorhinus teeth from the lower Maastrichtian of central Chile are now referred to Echinorhinus taverai sp. nov. The occurrence of the studied material directly associated with an elasmosaur skeleton is consistent with other findings of the genus in the Southern Hemisphere, suggesting that Upper Cretaceous austral Echinorhinus spp. were opportunistic scavengers in the shallow coastal waters of southern South America.

刺鲨的牙齿是迄今为止在智利中部和南美洲的上白垩纪报道的最稀有的软骨鱼类元素之一。在这项研究之前，它的当地记录仅限于四个可用的标本，以前被认为相当于阿根廷巴塔哥尼亚上马斯特里赫特人的牙齿，因为这些被称为棘猴。这一贡献提供了两个新的元素，包括来自智利中部的第一颗完整的大牙齿，显示出一个远端突出的基齿和一个复杂的中端锯齿状切削刃，其原始基具两个清晰的齿，这是几个新生代物种中普遍存在的特征。这些新特征在先前来自智利中部的材料中没有被注意到，要么是由于信息部分缺失，要么是由于较小的已知样本的未成熟生长阶段。新标本的牙齿特征在已知棘猴属物种中是独一无二的；此外，相对于那些在新生代物种中普遍存在的特征，冠状特征代表了一种祖先的条件。有了新的证据，在智利中部马斯特里赫特地区的下马斯特里赫特地区发现的所有已知的棘龙牙齿现在都被归为棘龙（echinhinus taverai sp. 11 .）。与依拉丝龙骨架直接相关的研究材料的出现与南半球该属的其他发现一致，这表明上白垩世南方棘龙是南美洲南部浅海水域的机会主义食腐动物。

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引用次数: 0

A new species of Pahasapasaurus (Plesiosauria: Polycotylidae) from the upper Cretaceous (lower Turonian) Tropic Shale of southern Utah, U.S.A. 美国犹他州南部上白垩世（下Turonian）热带页岩中的一新种（蛇颈龙目：多子龙科）

IF 1.7 3区地球科学 Q1 GEOLOGY

Cretaceous Research

Pub Date : 2026-04-01 Epub Date: 2025-11-25 DOI: 10.1016/j.cretres.2025.106269

Rebecca L. Schmeisser McKean

The Tropic Shale is an Upper Cretaceous (Cenomanian–Turonian) formation that was deposited along the western side of the Cretaceous Western Interior Seaway. The biodiversity within the Tropic Shale is high, with marine organisms including ammonoids, bivalves (clams, oysters), gastropods, actinopterygians, chondrichthyans, turtles, mosasaurs, and plesiosaurs. This paper describes a new polycotylid plesiosaur, Pahasapasaurus gillettei sp. nov., based on a well-preserved, partial skeleton from the Tropic Shale of southern Utah, U.S.A. Several characteristics from this specimen are shared with the genus Pahasapasaurus, including the morphology of the palate (lack of an anterior interpterygoid vacuity, a robust parasphenoid with ventral keel), an elongated temporal fenestra, a low tooth count in the mandibular symphysis, and the lack of a posterodistal expansion of the humerus. Pahasapasaurus gillettei is distinct in possessing teeth with smooth enamel, a posterior extension of the squamosals along the midline, a low maxillary tooth count, a small posterolateral extension of the coracoid, as well as a unique combination of characters. Pahasapasaurus was previously known from a single species (P. haasi) from the upper Cenomanian Greenhorn Limestone of South Dakota, U.S.A., deposited along the eastern side of the Western Interior Seaway. The discovery of P. gillettei extends the known range of the genus Pahasapasaurus into slightly younger (lower Turonian) sediments along the opposite side of the seaway and has implications for the evolutionary history of polycotylid plesiosaurs. Pahasapasaurus gillettei also adds a sixth species of short-neck plesiosaur to the Tropic Shale, expanding the known biodiversity of this productive formation.

热带页岩是沿白垩纪西部内陆海道西侧沉积的上白垩统（塞诺曼—turonian）组。热带页岩的生物多样性很高，海洋生物包括菊石类、双壳类（蛤蜊、牡蛎）、腹足类、放光鳍类、软骨鱼类、海龟、沧龙和蛇颈龙。本文描述了一种新的多子叶蛇颈龙，Pahasapasaurus gillettei sp. nov.，基于美国犹他州南部热带页岩中保存完好的部分骨骼，该标本的几个特征与Pahasapasaurus属相同，包括上颚的形态（缺乏前翼状间隙，具有腹侧龙骨的粗大副骨），延长的颞窗，下颌联合中的低齿数，而且肱骨后远端没有扩张。gilletepahasapasaurus的独特之处在于牙齿釉质光滑，鳞片沿中线向后延伸，上颌牙齿数量少，喙后外侧延伸小，以及独特的特征组合。在此之前，人们从美国南达科塔州沿西部内陆海道东侧沉积的上切诺曼尼亚格林霍恩石灰岩中发现了一种Pahasapasaurus （P. haasi）。P. gillettei的发现将Pahasapasaurus属的已知范围扩展到沿海道对面的稍微年轻的（下Turonian）沉积物中，并对多子叶蛇颈龙的进化史具有启示意义。吉列帕萨龙还为热带页岩增加了第六种短颈蛇颈龙，扩大了这一多产地层的已知生物多样性。

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引用次数: 0

Blooming under the shadow of Patagotitan mayorum: Early Cretaceous tiny flowers from Patagonia, Argentina 在巴塔哥尼亚的阴影下绽放：早白垩世的小花，来自阿根廷巴塔哥尼亚

IF 1.7 3区地球科学 Q1 GEOLOGY

Cretaceous Research

Pub Date : 2026-02-01 Epub Date: 2025-10-14 DOI: 10.1016/j.cretres.2025.106254

Giovanni C. Nunes , Ignacio H. Escapa , Luis M. Sender , N. Rubén Cúneo , Maria A. Gandolfo

The fossil record of angiosperm reproductive remains from Lower Cretaceous deposits is critical for understanding angiosperm early evolution and rapid radiation. The fossil record of early flowers from the Southern Hemisphere is still extremely scarce compared to the Northern Hemisphere, particularly from outcrops located south of the Tropic of Capricorn. Here, we describe flowers from Upper Albian (101 Ma; Cerro Barcino Formation) deposits of Patagonia, Argentina, found in association with Patagotitan mayorum, the largest known dinosaur in the world at present. The flowers are pistillate, less than 10 mm in diameter, actinomorphic, pentamerous, and perigynous, with a tepaloid perianth, and are assigned to the new genus and species Patagoflora minima. This discovery represents the first Albian record of flowers for southern South America and one of the best-dated ones for Gondwana. Patagoflora minima is also one of the very few examples of flowers preserved along with dinosaurs. Its association with abundant and diverse angiosperm leaves and dinosaur remains provides significant data for understanding the ecosystems inhabited by the largest terrestrial animals that ever lived.

下白垩世被子植物生殖遗存的化石记录对了解被子植物的早期演化和快速辐射具有重要意义。与北半球相比，南半球早期花朵的化石记录仍然极其稀少，特别是在南回归线以南的露头。在这里，我们描述了来自阿根廷巴塔哥尼亚上Albian （101 Ma； Cerro Barcino组）矿床的花，这些花与目前世界上已知的最大的恐龙巴塔哥提龙mayorum有关。该花具雌蕊，直径小于10mm，辐射对称，五分生，周生，花被被片状，属于新属和新种Patagoflora minima。这一发现代表了南美洲南部的第一个阿尔比亚花记录，也是冈瓦纳最准确的时间记录之一。Patagoflora minima也是为数不多的与恐龙一起保存下来的花朵之一。它与丰富多样的被子植物叶片和恐龙遗骸的联系为了解曾经生活过的最大陆生动物所居住的生态系统提供了重要的数据。

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引用次数: 0

New ephialtitid wasps (Hymenoptera) of the Early Cretaceous Jehol Biota from NE China 中国东北早白垩世热河生物群中蜂类新种（膜翅目）

IF 1.7 3区地球科学 Q1 GEOLOGY

Cretaceous Research

Pub Date : 2026-02-01 Epub Date: 2025-09-13 DOI: 10.1016/j.cretres.2025.106234

Ning Jia , Qi Zhang , Haichun Zhang

The Jurassic-Early Cretaceous family Ephialtitidae is considered as one of the most basal lineages of Apocrita, one of two suborders of the insect order Hymenoptera. Herein three genera and three species, of which one genus and three species are recognized as new to science, are described and illustrated from the Jianshangou Bed of the lower Yixian Formation of western Liaoning, NE China, including Tuphephialtites wangi sp. nov., Crephanogaster beipiaoensis sp. nov., and Chorephialtites longispinus gen. et sp. nov. So far a total of three genera and five species within the subfamily Ephialtitinae are known from the middle Jehol Biota in NE China, suggesting a high morphological disparity of Ephialtitidae during the Early Cretaceous in NE China. Occurrence of Crephanogaster Rasnitsyn, 1990 in both the Turga Formation of Transbaikalia, Russia and the Yixian Formation of NE China confirms these two formations are of coeval deposits. Additionally, a key to the genera of Ephialtitinae is given.

叶蜂科是膜翅目昆虫的两个亚目之一，是膜翅目昆虫中最基础的分支之一。这里3属3种,其中一个属和三个物种被认为是新的科学,描述和插图尖山沟黟县形成西方的辽宁、东北中国,包括Tuphephialtites不多sp. 11月,Crephanogaster beipiaoensis sp. 11月,和Chorephialtites longispinus将军等sp. 11月到目前为止共3属5种亚科内Ephialtitinae被从中间热河生物群在中国东北,表明早白垩世在中国东北地区有很高的形态差异。1990年在俄罗斯外贝加尔湖图尔加组和中国东北义县组均发现拉斯尼琴Crephanogaster Rasnitsyn，证实了这两个组为同时期沉积。此外，还给出了一种属的钥匙。

引用次数: 0

A continental record of the late Campanian negative carbon isotopic excursion (LCE, late Campanian event) in the Dinosaur Park Formation, Alberta, Canada 加拿大阿尔伯塔省恐龙公园组晚坎帕尼亚负碳同位素漂移（LCE，晚坎帕尼亚事件）的大陆记录

IF 1.7 3区地球科学 Q1 GEOLOGY

Cretaceous Research

Pub Date : 2026-02-01 Epub Date: 2025-11-10 DOI: 10.1016/j.cretres.2025.106263

Muditha Goonetilleke, Ricardo L. Silva, Paul R. Durkin

The Campanian was the longest stage of the Late Cretaceous and witnessed multiple global carbon cycle disruption episodes, including the negative carbon isotope excursion (CIE) known as the Late Campanian Event (LCE). However, Campanian-aged δ¹³C perturbations are primarily documented in marine environments, raising questions about their record in terrestrial settings and the potential use of terrestrial stable carbon isotope records from the Campanian as a chemostratigraphic tool. In this study, we present a stable carbon isotope record from fossil organic matter preserved in the alluvial floodplains of the Dinosaur Park Formation, which is radiometrically dated to the time interval containing the LCE. Results reveal a ∼0.8 ‰ negative CIE recorded in floodplain fossil organic matter. We show that the negative CIE is not a result of changing organic matter or diagenesis and that it likely reflects the global atmospheric δ¹³C signal during the Campanian. We interpreted the identified negative CIE as a continental record of the LCE. When we couple our δ¹³C_TOC record with the Dinosaur Park Formation's age model, we can correlate our section with other well-dated European marine stratigraphic sections. Our findings demonstrate that Campanian carbon cycle perturbations are preserved in terrestrial environments. For the first time, we recognize that the deposition of the world-famous dinosaur-bearing Dinosaur Park Formation in Alberta was contemporaneous with a major global carbon cycle perturbation episode. Our findings contribute to contextualizing ongoing research and re-evaluating previous studies on dinosaur evolution and other contemporary groups, within the framework of planetary-scale Earth system disturbances.

坎帕纪是晚白垩纪最长的阶段，经历了多次全球碳循环中断事件，包括被称为晚坎帕纪事件的负碳同位素偏移（CIE）。然而，坎帕尼亚期δ13C扰动主要记录在海洋环境中，这对它们在陆地环境中的记录以及坎帕尼亚期陆地稳定碳同位素记录作为化学地层学工具的潜力提出了质疑。在这项研究中，我们从恐龙公园组冲积洪泛平原中保存的化石有机质中获得了稳定的碳同位素记录，该记录的放射性年代可追溯到包含LCE的时间间隔。结果表明，河漫滩化石有机质的CIE值为- 0.8‰。结果表明，负的CIE值不是有机质变化或成岩作用的结果，它可能反映了坎帕纪全球大气δ13C信号。我们将确定的负CIE解释为LCE的大陆记录。当我们将δ13CTOC记录与恐龙公园组的年龄模型相结合时，我们可以将我们的剖面与其他确定年代的欧洲海相地层剖面相关联。我们的研究结果表明，坎帕尼亚碳循环的扰动在陆地环境中得到了保存。我们第一次认识到，世界著名的艾伯塔省恐龙公园组的沉积与一次重大的全球碳循环扰动事件是同时发生的。我们的发现有助于在行星尺度地球系统扰动的框架内，对正在进行的恐龙进化和其他当代类群的研究进行背景分析和重新评估。

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