Cretaceous Research最新文献_第5页

Persistence of a shallow-marine environment in the western Kunlun area (northwestern Tibet) until the early Maastrichtian: Evidence from radiolitid rudist bivalves 昆仑西部地区（西藏西北部）浅海环境一直持续到马斯特里赫特早期：来自放射虫类原生双壳类的证据

IF 1.9 3区地球科学 Q1 GEOLOGY

Cretaceous Research

Pub Date : 2024-11-08 DOI: 10.1016/j.cretres.2024.106035

Bintao Gao , Qinghai Zhang , Xin Rao , Lin Ding

The closing of the Tethys Ocean during the Mesozoic and Cenozoic dramatically affected the palaeogeography, palaeoenvironment and biotic evolution of the Tibetan Plateau and surrounding areas. The timing of closure of the Tethys Ocean in different areas is recorded by the youngest marine deposits. In the western Kunlun area of northwestern Tibet, the Tielongtan Group represents the youngest marine deposits, and is rich in rudist bivalves; however, its depositional age, particularly the age of final deposition, is poorly constrained. Systematic and palaeobiogeographic analyses were conducted on rudists from the Tielongtan Group in the eastern Loqzung Mountains. Four genera and two species were identified: Biradiolites boldjuanensis, Gorjanovicia acuticostata, Durania sp. and Radiolites sp. The occurrence of the lower Maastrichtian index fossil, Biradiolites boldjuanensis, indicates that deposition of the Tielongtan Group continued until the early Maastrichtian. Therefore, the results of this and previous studies indicate that deposition of the Tielongtan Group spanned from at least the Turonian to the early Maastrichtian. Palaeobiogeographical analyses show that B. boldjuanensis was endemic in Central Asia, whereas G. acuticostata might have extended beyond the Mediterranean region. During the Late Cretaceous, the shallow ocean in the western Kunlun area contained both cosmopolitan and endemic rudists.

中生代和新生代特提斯洋的关闭对青藏高原及其周边地区的古地理、古环境和生物演化产生了巨大影响。特提斯洋在不同地区的关闭时间由最年轻的海相沉积记录下来。在西藏西北部的昆仑西部地区，铁龙滩组是最年轻的海相沉积，富含芦管双壳类，但其沉积年龄，尤其是最终沉积年龄，尚不明确。研究人员对来自东罗经山铁龙潭组的裸贝进行了系统学和古生物地理学分析。共鉴定出 4 属 2 种：马斯特里赫特下统指标化石 Biradiolites boldjuanensis 的出现表明，铁龙潭组的沉积一直持续到马斯特里赫特早期。因此，本研究和之前的研究结果表明，铁龙潭组的沉积至少从都龙纪一直延续到马斯特里赫特早期。古生物地理学分析表明，B. boldjuanensis 是中亚地区的特有种，而 G. acuticostata 则可能延伸到了地中海地区以外。在晚白垩世，昆仑西部的浅海中既有世界性的鲁德鱼，也有地方性的鲁德鱼。

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引用次数: 0

A beetle-like minute litter bug trapped in 99 million-year-old Kachin amber (Hemiptera, Dipsocoromorpha, Schizopteridae) 被困在距今 9,900 万年前的克钦琥珀中的甲虫状微小垃圾虫（半翅目，二角目，裂翅虫科）

IF 1.9 3区地球科学 Q1 GEOLOGY

Cretaceous Research

Pub Date : 2024-11-07 DOI: 10.1016/j.cretres.2024.106034

Jun Chen , De Zhuo , Guangying Ren , Fei Yang , Baizheng An

Minute litter bugs (Dipsocoromorpha) constitute one of the most ancient and specialized lineages of Heteroptera. This infraorder displays an array of deviant body structures, such as dramatically varying tarsal formula, asymmetrical male abdominal terminal segments, and beetle-like appearance with elytriform tegmina. Most these unusual morphological traits have been reported in early dipsocoromorphans, except the stunning coleopteroid wings. Herein, a new minute litter bug, Qiaoia menghaoae Chen and Zhuo, gen. et sp. nov. is described from middle Cretaceous Kachin amber, northern Myanmar, representing the first beetle-like dipsocoromorphan in the Mesozoic. The new genus and species is characterized by three pairs of extremely strong spine-like trichobothria on vertex and pronotum, thoracic legs densely covered with tiny setae and long spines, hemelytra generally dark-stained and with a narrow bright transverse stripe in middle. Our new find further confirms that the grotesque morphological characteristics displayed in modern minute litter bugs have evolved and likely prevalent in their Cretaceous ancestors. Additionally, morphological analyses suggest some Mesozoic dipsocoromorphans including Qiaoia menghaoae Chen and Zhuo, gen. et sp. nov. probably lived in relatively open areas like arboreal habitats and were more mobile and active than their recent descendants, which are commonly with cryptic life style.

微小垃圾虫（Dipsocoromorpha）是异翅目中最古老、最特化的种类之一。该亚纲显示出一系列奇特的身体结构，如跗骨式的显著变化、雄性腹部末节的不对称以及甲虫般的外观和椭圆形的蜕膜。除了令人惊叹的鞘翅外，大多数这些不寻常的形态特征都曾在早期的二翅目中被报道过。本文描述了缅甸北部中白垩世克钦琥珀中发现的一种新的微小垃圾虫--Qiaoia menghaoae Chen and Zhuo, gen.新属、新种的特征是：顶点和前胸有三对极强的刺状三齿，胸腿密布细小刚毛和长刺，半甲壳一般呈暗色，中间有一条窄而明亮的横纹。我们的新发现进一步证实，现代微小垃圾虫所表现出的怪异形态特征是进化而来的，很可能在其白垩纪祖先中就已普遍存在。此外，形态学分析表明，中生代的一些双角虫，包括陈和卓（Qiaoia menghaoae Chen and Zhuo，gen. et sp. nov.），可能生活在树栖等相对开阔的地区，与它们的近代后代相比，它们的活动能力更强，更活跃，而它们的生活方式通常是隐蔽的。

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引用次数: 0

Early Aptian development and OAE 1a-linked demise of a carbonate platform in the western Tethys: Lower Cretaceous of Sierra Mariola (South Iberian Paleomargin, SE Spain) 特提斯西部早白垩世碳酸盐平台的发展和与 OAE 1a 有关的消亡：马里奥拉山脉（西班牙东南部，南伊比利亚古陆）下白垩统

IF 1.9 3区地球科学 Q1 GEOLOGY

Cretaceous Research

Pub Date : 2024-10-30 DOI: 10.1016/j.cretres.2024.106032

Rafael Martínez-Rodríguez , José M. Castro , Ginés A. de Gea , Luis M. Nieto , Pedro A. Ruiz-Ortiz , Peter W. Skelton

A carbonate platform succession of early Aptian age is described from the Sierra Mariola, which is located within the Prebetic Zone of the Betic External Zones (BEZ) of the Southern Iberian Palaeomargin, in SE Spain. The facies and stratigraphic architecture of the studied succession are described and analysed from multiple logged sections to characterize different depositional environments.

The cyclic stacking of facies observed suggests a possible orbital forcing of climate transmitted to sedimentation. Superbundles are recognized describing two sequences of Regressive-Transgressive (R-T) evolution. Analysis of carbon-isotope data identifies both the interval before the hyperthermal event of the early Aptian Oceanic Anoxic Event (OAE 1a) and the onset of the latter event, with an abrupt change in sedimentation marking the demise of the carbonate platform. The field outcrop thus preserves a record of the transition from a greenhouse world to a hothouse event.

研究描述了位于西班牙东南部伊比利亚古大陆南贝蒂奇外带（BEZ）预贝蒂奇区（Prebetic Zone）的马里奥拉山脉（Sierra Mariola）早万古纪碳酸盐岩平台演替。通过多个测井剖面描述和分析了所研究演替的地层面貌和地层结构，以确定不同沉积环境的特征。超基性构造描述了两个递变-横变（R-T）演化序列。碳同位素数据分析确定了早安普世大洋缺氧事件（OAE 1a）高热事件之前的时间段以及后一事件开始的时间段，沉积的突然变化标志着碳酸盐平台的消亡。因此，野外露头保留了从温室世界向暖房事件过渡的记录。

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引用次数: 0

A new oviraptorosaur from the Lower Cretaceous Miaogou Formation of western Inner Mongolia, China 中国内蒙古西部白垩纪下统庙沟地层出土的新卵盗龙

IF 1.9 3区地球科学 Q1 GEOLOGY

Cretaceous Research

Pub Date : 2024-10-24 DOI: 10.1016/j.cretres.2024.106023

Mingze Hao , Zhiyu Li , Zhili Wang , Shuqiong Wang , Feimin Ma , Qinggele , J. Logan King , Rui Pei , Qi Zhao , Xing Xu

A new oviraptorosaur, Yuanyanglong bainian gen. et sp. nov. is described based on two specimens recovered from the Lower Cretaceous Miaogou Formation of the Maortu locality in Chilantai, Inner Mongolia, China. This new species is intermediate in morphology between the earliest-diverging and late-diverging oviraptorosaurs, and our phylogenetic analysis supports it as a sister taxon to the clade formed by Avimimidae and Caenagathoidea. Notably, this new early-diverging oviraptorosaur has an ilium with an extremely short postacetabular process and hindlimbs with proportionally elongate and fused lower segments, a character combination unknown among other oviraptorosaurs but common in wading birds, suggesting a potential ecology involving wading. Preserved gastroliths similar to Caudipteryx suggest a gastric mill function in our new species, and our preliminary observations indicate potential discrepancies in the digestion mode of early- and late-diverging oviraptorosaurs.

根据在中国内蒙古奇兰台毛尔图地层下白垩统庙沟地层中发现的两件标本，描述了一种新的卵翼龙--元阳龙白年属等新种。这个新物种在形态上介于最早分化的卵翼龙和晚分化的卵翼龙之间，我们的系统发育分析表明，它是阿维米亚科（Avimidae）和卡那卡托亚科（Caenagathoidea）所形成的支系的姊妹类群。值得注意的是，这种新的早期分化卵翼龙的髂骨具有极短的后髋臼突，后肢下节按比例拉长并融合，这种特征组合在其他卵翼龙中并不常见，但在涉水鸟类中却很常见，这表明它可能具有涉水的生态学特征。我们的初步观察结果表明，早期和晚期卵翼龙的消化模式可能存在差异。

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引用次数: 0

Eolian-fluvial succession in the Early Cretaceous from the Ordos Basin 鄂尔多斯盆地早白垩世的风化-流积演替

IF 1.9 3区地球科学 Q1 GEOLOGY

Cretaceous Research

Pub Date : 2024-10-22 DOI: 10.1016/j.cretres.2024.106031

Dawei Qiao , Nan Peng , Hongwei Kuang , Yongqing Liu , Yanxue Liu , Liwei Cui , Yuchong Wang

Cretaceous eolian deposits are widely developed in North China, among which the Lower Cretaceous eolian (erg) sedimentary strata in the Ordos Basin are the most representative. Many studies have been conducted on eolian deposits in the Ordos Basin, especially the Luohe Formation; however, there is a lack of systematic sedimentology research and the corresponding research on the evolution of sedimentary facies. Therefore, to explore the Mesozoic drought events and the systematic evolution of the sub-tropical erg zone, this study reports the fluvial–eolian sedimentary sequences of the Early Cretaceous Luohe and Yijinhuoluo Formations in the Ordos Basin. Spatially, through detailed sedimentary lithofacies and structural analysis of different outcrops, the combination law of sedimentary facies can be determined. Based on this, a three-dimensional sedimentary model of erg is reconstructed. The erg environment is divided into three sub-environments: erg margin, erg margin–centre transition and erg centre. According to the evolution of the sedimentary facies, the sedimentary evolution from the Latef Jurassic to the Early Cretaceous in the Ordos Basin is divided into five stages. The Ordos Basin has experienced the delta, erg formation, erg deposition, erg shrinkage and evaporating salt-lake stages. The vertical sedimentary evolution indicates climatic oscillation in North China from the Late Jurassic to the Early Cretaceous. Under the control of the sub-tropical high belt, the Ordos Basin experienced a hot and arid climate during the Cretaceous, forming a widely distributed erg belt in the region. During this period, a small-scale climate shock occurred under the hot and arid background, changing the sedimentary environment.

华北地区白垩纪沉积广泛发育，其中以鄂尔多斯盆地下白垩统沉积地层最具代表性。关于鄂尔多斯盆地沉积，尤其是漯河地层的研究很多，但缺乏系统的沉积学研究和相应的沉积面演化研究。因此，为探讨中生代干旱事件和亚热带糜棱带的系统演化，本研究报告了鄂尔多斯盆地早白垩世漯河地层和伊金霍洛旗地层的河流-风化沉积序列。在空间上，通过对不同露头的详细沉积岩相和构造分析，确定了沉积面的组合规律。在此基础上，重建了鄂尔多斯盆地的三维沉积模型。尔格环境被划分为三个子环境：尔格边缘、尔格边缘-中心过渡带和尔格中心。根据沉积面的演化，将鄂尔多斯盆地晚侏罗世至早白垩世的沉积演化划分为五个阶段。鄂尔多斯盆地经历了三角洲期、额尔古纳形成期、额尔古纳沉积期、额尔古纳收缩期和盐湖蒸发期。垂直沉积演化显示了华北地区从晚侏罗世到早白垩世的气候震荡。在亚热带高原带的控制下，鄂尔多斯盆地在白垩纪经历了炎热干旱的气候，在该地区形成了分布广泛的鄂尔浑带。这一时期，在炎热干旱的背景下发生了小规模的气候震荡，改变了沉积环境。

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引用次数: 0

New dance flies from Burmese amber providing the new insight to early evolution of feeding habits in Atelestidae (Diptera: Empidoidea) 缅甸琥珀中发现的新舞蝇，为了解Atelestidae（双翅目：Epidoidea）的早期食性进化提供了新的视角

IF 1.9 3区地球科学 Q1 GEOLOGY

Cretaceous Research

Pub Date : 2024-10-20 DOI: 10.1016/j.cretres.2024.106025

Haoqiang Zhang , Yifan Hong , Chungkun Shih , Dong Ren , Yongjie Wang

The superfamily Empidoidea is a megadiverse group of Diptera that exhibits abundant morphological specializations for predatory feeding habits, with the mouthparts unequivocally representing the core apparatus and are highly associated with feeding behaviors. Nevertheless, the evolution of feeding habits in Empidoidea was not well documented especially due to the rarity of fossil evidence at the early stage. We describe a new genus with two new species of Atelestidae, namely Promeghyperus muricicaudatus Zhang, Shih, Ren et Wang gen. et sp. nov. and P. hirtus Zhang, Shih, Ren et Wang sp. nov. from the mid-Cretaceous Burmese amber. Details of mouthparts were well-preserved in the specimens of P. muricicaudatus gen. et sp. nov. that allows for a morphological functional analysis. The results reveal that these two mid-Cretaceous atelestid species retain the well-defined epipharyngeal blades and evolve a predaceous feeding habit in contrast to their extant relatives. The evolution of epipharyngeal blades in Empidoidea is summarized under the current phylogenetic framework. This finding not only enhanced the knowledge of species diversity of Empidoidea during the mid-Cretaceous but also provided the key evidence to document the evolution of feeding habits among Empidoidea. Based on the analysis of palaeogeographic occurrences of fossil and extant lineages, the evolutionay history of Atelestidae is outlined.

双翅目栉水母超科（Epidoidea）是一个种类繁多的双翅目昆虫类群，具有丰富的捕食习性形态特化，其中口器明确地代表着核心器官，与捕食行为高度相关。然而，由于早期化石证据的稀缺性，食蚁兽的进化习性并没有得到很好的记录。我们描述了来自白垩纪中期缅甸琥珀中的一个新属和两个新种，即Promeghyperus muricicaudatus Zhang, Shih, Ren et Wang gen.P. muricicaudatus gen. et sp. nov.的口器细节保存完好，可以进行形态功能分析。研究结果表明，这两个白垩纪中期的无尾类物种保留了清晰的会咽叶片，并进化出一种捕食习性，与现生的亲缘物种形成鲜明对比。在目前的系统发育框架下，对尾蜥目会厌咽叶片的演化进行了总结。这一发现不仅增进了对白垩纪中期帝皮目物种多样性的了解，而且为记录帝皮目之间摄食习性的演化提供了关键证据。基于对化石和现生品系的古地理出现的分析，勾勒出黄口蝠科的演化历史。

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引用次数: 0

Classostrobus doylei, a new cheirolepidiaceous cone with in situ pollen from the Figueira da Foz Formation (lower Aptian – upper Albian), western Portugal Classostrobus doylei，葡萄牙西部 Figueira da Foz Formation（下古生代 - 上阿尔比统）出土的一种带有原位花粉的新栉水母圆锥体

IF 1.9 3区地球科学 Q1 GEOLOGY

Cretaceous Research

Pub Date : 2024-10-18 DOI: 10.1016/j.cretres.2024.106028

Mário Miguel Mendes , Maria Tekleva , Jiří Kvaček , Pedro Callapez

The genus Classostrobus was established to accommodate unattached Classopollis-containing cones. It is noteworthy that Classopollis as a whole shows significant variation in morphological structure, and male cones bearing Classopollis pollen grains are rarer than vegetative organs of cheirolepidiaceous conifers. A new cheirolepidiaceous microsporangiate cone, Classostrobus doylei, containing Classopollis triangulus pollen grains is described for the first time based on a single specimen from sedimentary rocks exposed in the Carregueira open-cast clay pit complex close to the small village of Juncal, in the Estremadura region(Lusitanian Basin, western Portugal). The plant-bearing horizon from Carregueira is included in the basal part of the Famalicão Member of the Figueira da Foz Formation, considered to be of late Aptian – early Albian age. The new microsporangiate cone is small, about 2.0 mm long and 1.5 mm wide, ovoid in shape and of typically coniferous structure, probably belonging to Pseudofrenelopsis zlatkoi. The male cone consists of about 16 peltate, imbricated microsporophylls of deltoid shape. Each sporophyll is composed of a stalk and deltoid head showing abaxially 4–5 ovoid pollen sacs. The marginal parts of the sporophylls display long and unicellular trichomes. The observed in situ pollen grains are triangular to subcircular in outline, 16–28 μm in diameter, with an equatorial girdle, subequatorial rimula, proximal trilete scar and a distal cryptopore. The pollen ultrastructure is typical for Classopollis, except for the destroyed condition of the exine. The in situ pollen grains under study are consistent with the data on known dispersed Classopollis triangulus.

Classostrobus属的建立是为了容纳未附着的含Classopollis的球果。值得注意的是，Classopollis 作为一个整体在形态结构上表现出显著的差异，而且带有 Classopollis 花粉粒的雄球果比螯针叶树的无性器官更为罕见。本报告首次描述了一种新的螯合鳞茎微孢子锥--Classostrobus doylei，它含有Classopollis triangulus花粉粒，该标本来自葡萄牙西部埃斯特雷马杜拉地区（葡萄牙西部卢西坦盆地）Juncal小村附近的Carregueira露天粘土矿坑群中出露的沉积岩。来自 Carregueira 的含植物的地层属于 Figueira da Foz Formation 的 Famalicão 成员的基底部分，被认为是始新世晚期-阿尔卑斯早期。新发现的微孢子囊锥体较小，长约 2.0 毫米，宽约 1.5 毫米，呈卵圆形，具有典型的针叶结构，可能属于 Pseudofrenelopsis zlatkoi。雄球果由约 16 个盾状、交错的小孢子叶组成，呈正三角形。每个孢子叶由柄和正三角形头状花序组成，背面有 4-5 个卵圆形花粉囊。孢子叶的边缘部分长有单细胞毛状体。观察到的原位花粉粒轮廓呈三角形至近圆形，直径为 16-28 μm，有赤道束带、近赤道瓣膜、下端三裂痕和远端隐孔。花粉的超微结构是 Classopollis 的典型特征，只是外皮被破坏了。所研究的原位花粉粒与已知散布的三角花粉块（Classopollis triangulus）的数据一致。

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引用次数: 0

Cicada nymph trace fossils from South American Maastrichtian paleosols 南美洲马斯特里赫特古溶岩中的蝉蛹痕量化石

IF 1.9 3区地球科学 Q1 GEOLOGY

Cretaceous Research

Pub Date : 2024-10-17 DOI: 10.1016/j.cretres.2024.106029

Diego Luciano Nascimento , Éverton Vinicius Valezio , Marcelo Krause

The Cretaceous was a pivotal Period in the evolution of major insect groups, including cicadas. Insect diversification led to an increased complexity in the paleosol ichnofabrics due to the emergence of chambers associated with reproductive and feeding behaviors. Therefore, any new record of trace fossils attributed to cicadas from the Cretaceous period represent a significant advancement in understanding the diversification of this group and the emergence of insect feeding chambers, throughout the geological record. This work describes the record of the ichnogenus Feoichnus attributed to feeding chambers of cicada nymphs (Hemiptera: Cicadidae) from Maastrichtian paleosols developed in floodplain deposits of The Marília Formation (Bauru Basin, Brazil). The described Feoichnus chambers are elongated, hemispherical, and upwardly concave, with a lining covering the inner surface of the wall. The inner surface exhibits thin, irregular ridges and grooves, likely associated with fine roots. Feoichnus occurs in association with Beaconites antarcticus and root traces found within the feeding chamber, it could be indicating the movement of the trace maker and the feeding chamber from one root to another. These characteristics indicate the xylem-feeding behavior of Feoichnus trace maker in accordance with extant cicada nymph ecology. The presence of Beaconites antarcticus associated with Feoichnus and rhizoliths probably represents the foraging behavior of cicada nymphs and the displacement of feeding chambers in well-drained, rooted soils. Therefore, the cicada nymph could be the trace maker of both traces representing feeding and locomotion behavior. This contribution expands the knowledge about plant–insect interactions and insect groups that compose the Cretaceous paleosols ichnofabrics from South America.

白垩纪是包括蝉在内的主要昆虫类群进化的关键时期。由于出现了与繁殖和进食行为相关的腔室，昆虫的多样化导致了古沉积层昆虫化石的复杂性增加。因此，白垩纪时期蝉的痕迹化石的任何新记录，都代表着在整个地质记录中，在了解蝉类的多样化和昆虫食室的出现方面取得了重大进展。这项研究描述了蝉若虫（半翅目：蝉科）哺育室的昆虫Feoichnus的记录，这些哺育室来自马里利亚地层（巴西包鲁盆地）洪积平原沉积物中发育的马斯特里赫特古溶胶。所描述的 Feoichnus 腔室呈拉长的半球形，向上凹陷，内壁表面覆盖着一层衬里。内表面呈现出不规则的细脊和凹槽，很可能与细根有关。Feoichnus 与北极喙藻和饲养室内发现的根部痕迹一起出现，这可能表明痕迹制造者和饲养室从一个根部转移到另一个根部。这些特征表明迹器蝉的木质部取食行为与现存蝉若虫生态学相符。Beaconites antarcticus 与 Feoichnus 和根瘤的存在可能代表了蝉若虫的觅食行为以及在排水良好的根系土壤中觅食室的迁移。因此，蝉若虫可能是代表取食和运动行为的两种痕迹的制造者。这一贡献扩展了有关植物与昆虫之间的相互作用以及构成南美洲白垩纪古溶岩昆虫织物的昆虫群的知识。

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引用次数: 0

New investigations on Cretaceous woods from the Jiaolai Basin, Shandong Province and their palaeoclimate relevance 山东省胶莱盆地白垩纪林木新调查及其与古气候的相关性

IF 1.9 3区地球科学 Q1 GEOLOGY

Cretaceous Research

Pub Date : 2024-10-16 DOI: 10.1016/j.cretres.2024.106030

Ruiying Hao , Zikun Jiang , Kemin Xu , Zhenguo Ning , Ning Tian , Yongdong Wang

The Jiaolai Basin of China is the southernmost edge of the distribution of the northern Jehol Biota and an important area which bears both the northern and southern palaeogeographical fauna representative species. The Laiyang flora in the Jiaolai Basin is located in the transitional region between the Early Cretaceous southern and northern flora of China. Currently, research on the plants in the transitional region between the northern and southern flora are relatively weak. Our study of specimens has enriched our understanding of the floral landscape in the transitional region between the north and south flora. Cretaceous wood fossils are well preserved in China and 66 species of 29 genera have been reported up to now, which are widely distributed in China. However, in the Cretaceous Shandong Province, there are few records of wood fossils. So far, only one genus and two species have been reported. In this paper a new material of fossil wood is described from the Early Cretaceous Zhifengzhuang Formation of Laiyang Group in Jingzhi area of Anqiu City, Jiaolai Basin, Shandong Province. The present specimen has uniseriate to triseriate pits on the radial walls of tracheids, taxodioid cross-field pitting and other characters. This discovery contributes to a better understanding of fossil wood diversity in Jiaolai Basin during the Cretaceous. Through the well preserved growth rings of the specimens, it can be inferred that the environmental paleoclimate of the Early Cretaceous in Shandong Province was generally arid, with some areas being humid.

中国胶莱盆地是热河生物群北部分布的最南端，也是同时拥有南北古地理动物群代表物种的重要地区。胶莱盆地的莱阳植物区系位于早白垩世中国南方植物区系与北方植物区系的过渡区。目前，对南北植物区系过渡区植物的研究相对薄弱。我们对标本的研究丰富了我们对南北植物区系过渡区植物景观的认识。我国白垩纪木化石保存较好，目前已报道有 29 属 66 种，在我国分布广泛。但在白垩纪的山东省，木化石的记录却很少。迄今为止，仅有 1 属 2 种的报道。本文描述了来自山东省安丘市蛟莱盆地景芝地区早白垩世莱阳组芝罘庄地层的木化石新材料。该标本在气管的径向壁上具有单列至三列凹坑、类鸟类横向凹坑等特征。这一发现有助于更好地了解白垩纪胶莱盆地木材化石的多样性。通过标本保存完好的生长年轮，可以推断山东省早白垩世的古气候环境总体干旱，部分地区湿润。

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引用次数: 0

Discovery of supposedly “Gondwanan” myrmeleontoids (Neuroptera) in the Lower Cretaceous of South Korea 在韩国下白垩统发现所谓的 "冈瓦纳 "岩浆虫（神经龙类

IF 1.9 3区地球科学 Q1 GEOLOGY

Cretaceous Research

Pub Date : 2024-10-16 DOI: 10.1016/j.cretres.2024.106024

Alexander V. Khramov , Gi-Soo Nam

Two new species of myrmeleontoid neuropterans are described from the Lower Cretaceous (Albian) of the Jinju formation (South Korea), Araripenymphes koreicus sp.nov. (Cratosmylidae) and Araripeneura asiatica sp.nov. (Araripeneuridae). This is the first Mesozoic record of Myrmeleontoidea from the Korean Peninsula. Genera Araripeneura Martins-Neto and Vulcano, 1989 and Araripenymphes Menon et al., 2005 have long been known only from the Lower Cretaceous of Brazil. Recently Araripenymphes was discovered in middle Cretaceous Burmese amber, which was considered as evidence for its Gondwanan origin. However, new records of these genera from the Lower Cretaceous of South Korea indicate that their distribution was in fact not Gondwanan, but cross-continental, contrary to initial suggestions.

本文描述了来自韩国晋州地层下白垩统（白垩世）的两个新种：Araripenymphes koreicus sp.nov.（Cratosmylidae）和Araripeneura asiatica sp.nov.。(Cratosmylidae) 和 Araripeneura asiatica sp.nov.(Araripeneuridae）。这是朝鲜半岛中生代的第一个Myrmeleontoidea记录。Araripeneura Martins-Neto and Vulcano, 1989 和 Araripenymphes Menon et al.最近，Araripenymphes 在中白垩世的缅甸琥珀中被发现，这被认为是其冈瓦纳起源的证据。然而，这些属在韩国下白垩统的新记录表明，它们的分布实际上不是贡得瓦纳，而是跨洲的，这与最初的观点相反。

引用次数: 0