Cretaceous Research最新文献

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

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

Bintao Gao , Qinghai Zhang , Xin Rao , Lin Ding

{"title":"Persistence of a shallow-marine environment in the western Kunlun area (northwestern Tibet) until the early Maastrichtian: Evidence from radiolitid rudist bivalves","authors":"Bintao Gao , Qinghai Zhang , Xin Rao , Lin Ding","doi":"10.1016/j.cretres.2024.106035","DOIUrl":"10.1016/j.cretres.2024.106035","url":null,"abstract":"<div><div>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: <em>Biradiolites boldjuanensis</em>, <em>Gorjanovicia acuticostata</em>, <em>Durania</em> sp. and <em>Radiolites</em> sp. The occurrence of the lower Maastrichtian index fossil, <em>Biradiolites boldjuanensis</em>, 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 <em>B</em>. <em>boldjuanensis</em> was endemic in Central Asia, whereas <em>G</em>. <em>acuticostata</em> 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.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"167 ","pages":"Article 106035"},"PeriodicalIF":1.9,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658854","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 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

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

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

{"title":"A beetle-like minute litter bug trapped in 99 million-year-old Kachin amber (Hemiptera, Dipsocoromorpha, Schizopteridae)","authors":"Jun Chen , De Zhuo , Guangying Ren , Fei Yang , Baizheng An","doi":"10.1016/j.cretres.2024.106034","DOIUrl":"10.1016/j.cretres.2024.106034","url":null,"abstract":"<div><div>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, <em>Qiaoia menghaoae</em> 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 <em>Qiaoia menghaoae</em> 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.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"167 ","pages":"Article 106034"},"PeriodicalIF":1.9,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658855","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 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

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

{"title":"A new oviraptorosaur from the Lower Cretaceous Miaogou Formation of western Inner Mongolia, China","authors":"Mingze Hao , Zhiyu Li , Zhili Wang , Shuqiong Wang , Feimin Ma , Qinggele , J. Logan King , Rui Pei , Qi Zhao , Xing Xu","doi":"10.1016/j.cretres.2024.106023","DOIUrl":"10.1016/j.cretres.2024.106023","url":null,"abstract":"<div><div>A new oviraptorosaur, <em>Yuanyanglong bainian</em> 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 <em>Caudipteryx</em> 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.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"167 ","pages":"Article 106023"},"PeriodicalIF":1.9,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658853","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

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

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

{"title":"Eolian-fluvial succession in the Early Cretaceous from the Ordos Basin","authors":"Dawei Qiao , Nan Peng , Hongwei Kuang , Yongqing Liu , Yanxue Liu , Liwei Cui , Yuchong Wang","doi":"10.1016/j.cretres.2024.106031","DOIUrl":"10.1016/j.cretres.2024.106031","url":null,"abstract":"<div><div>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.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"166 ","pages":"Article 106031"},"PeriodicalIF":1.9,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554278","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

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

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

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

{"title":"New dance flies from Burmese amber providing the new insight to early evolution of feeding habits in Atelestidae (Diptera: Empidoidea)","authors":"Haoqiang Zhang , Yifan Hong , Chungkun Shih , Dong Ren , Yongjie Wang","doi":"10.1016/j.cretres.2024.106025","DOIUrl":"10.1016/j.cretres.2024.106025","url":null,"abstract":"<div><div>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 <em>Promeghyperus muricicaudatus</em> Zhang, Shih, Ren et Wang gen. et sp. nov. and <em>P. hirtus</em> Zhang, Shih, Ren et Wang sp. nov. from the mid-Cretaceous Burmese amber. Details of mouthparts were well-preserved in the specimens of <em>P</em>. <em>muricicaudatus</em> 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.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"166 ","pages":"Article 106025"},"PeriodicalIF":1.9,"publicationDate":"2024-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571655","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

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

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

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

{"title":"Classostrobus doylei, a new cheirolepidiaceous cone with in situ pollen from the Figueira da Foz Formation (lower Aptian – upper Albian), western Portugal","authors":"Mário Miguel Mendes , Maria Tekleva , Jiří Kvaček , Pedro Callapez","doi":"10.1016/j.cretres.2024.106028","DOIUrl":"10.1016/j.cretres.2024.106028","url":null,"abstract":"<div><div>The genus <em>Classostrobus</em> was established to accommodate unattached <em>Classopollis</em>-containing cones. It is noteworthy that <em>Classopollis</em> as a whole shows significant variation in morphological structure, and male cones bearing <em>Classopollis</em> pollen grains are rarer than vegetative organs of cheirolepidiaceous conifers. A new cheirolepidiaceous microsporangiate cone, <em>Classostrobus doylei</em>, containing <em>Classopollis triangulus</em> 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 <em>Pseudofrenelopsis zlatkoi</em>. 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 <em>in situ</em> 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 <em>Classopollis</em>, except for the destroyed condition of the exine. The <em>in situ</em> pollen grains under study are consistent with the data on known dispersed <em>Classopollis triangulus</em>.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"166 ","pages":"Article 106028"},"PeriodicalIF":1.9,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554276","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

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

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

Diego Luciano Nascimento , Éverton Vinicius Valezio , Marcelo Krause

{"title":"Cicada nymph trace fossils from South American Maastrichtian paleosols","authors":"Diego Luciano Nascimento , Éverton Vinicius Valezio , Marcelo Krause","doi":"10.1016/j.cretres.2024.106029","DOIUrl":"10.1016/j.cretres.2024.106029","url":null,"abstract":"<div><div>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 <em>Feoichnus</em> 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 <em>Feoichnus</em> 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. <em>Feoichnus</em> occurs in association with <em>Beaconites antarcticus</em> 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 <em>Feoichnus</em> trace maker in accordance with extant cicada nymph ecology. The presence of <em>Beaconites antarcticus</em> associated with <em>Feoichnus</em> 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.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"166 ","pages":"Article 106029"},"PeriodicalIF":1.9,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142537852","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

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

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

{"title":"New investigations on Cretaceous woods from the Jiaolai Basin, Shandong Province and their palaeoclimate relevance","authors":"Ruiying Hao , Zikun Jiang , Kemin Xu , Zhenguo Ning , Ning Tian , Yongdong Wang","doi":"10.1016/j.cretres.2024.106030","DOIUrl":"10.1016/j.cretres.2024.106030","url":null,"abstract":"<div><div>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.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"166 ","pages":"Article 106030"},"PeriodicalIF":1.9,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142531016","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

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

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

Alexander V. Khramov , Gi-Soo Nam

引用次数: 0

A small sauropod trackway from the Upper Cretaceous Jindong Formation (Cenomanian), Goseong County, South Korea 韩国高城郡上白垩世金洞地层（震旦纪）出土的小型蜥脚类足迹

IF 1.9 3区地球科学

Cretaceous Research Pub Date : 2024-10-16 DOI: 10.1016/j.cretres.2024.106022

Han Sang Yoon, Yuong-Nam Lee, Euijun Park, Sungjin Lee

{"title":"A small sauropod trackway from the Upper Cretaceous Jindong Formation (Cenomanian), Goseong County, South Korea","authors":"Han Sang Yoon, Yuong-Nam Lee, Euijun Park, Sungjin Lee","doi":"10.1016/j.cretres.2024.106022","DOIUrl":"10.1016/j.cretres.2024.106022","url":null,"abstract":"<div><div>In 2000, a small sauropod trackway was discovered in the Upper Cretaceous Jindong Formation (Cenomanian) at Eosin-ri, Goseong County, South Korea. This quadrupedal trackway consists of 34 very small sauropod footprints, with an average manus width of 10.0 cm and pes length of 12.8 cm, showing low heteropody (mean IPS/IMS: 1.38). The manus tracks are oval to kidney-shaped, while the pes tracks are generally subcircular to V-shaped, lacking distinct claw marks. The trackway shows a medium to wide gauge (mean PTR: 38.8 %; WAP/PL: 1.18). The small footprint size and estimated trackmaker body size suggest that the trackmaker was an early juvenile titanosauriform sauropod based on the contemporaneous sauropod taxa of East Asia. Sauropod trackways reported from the Jindong Formation, including the Eosin-ri trackway, exhibit a tendency for narrower trackway gauges as pes length increases. This negative correlation between trackmaker size and trackway gauge may imply ontogenetic or behavioral variations within the same clade of sauropods or differences in gait or body plan amongst different sauropod taxa.</div></div>","PeriodicalId":55207,"journal":{"name":"Cretaceous Research","volume":"166 ","pages":"Article 106022"},"PeriodicalIF":1.9,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554388","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