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Evolutionary and paleobiological implications of Coleoptera (Insecta) from Tethyan-influenced Cretaceous ambers

Geoscience Frontiers 2016年第4期7卷 695-706页

作者： David Peris Enrico Ruzzier Vincent Perrichot Xavier Delclos Departament de Dinamica de la Terra i de l'Ocea and lnstitut de Recerca de la Biodiversitut (IRBio) Facultat de Geologia Universitat de Barcelona Marti i Franques s/n 08071 Barcelona Spain Department of Life Science Natural History Museum Cromwell Rd SW7 5BD London UK UMR CNRS 6118 Geosciences & OSUR Universite de Rennes 1 35042 Rennes cedex France

The intense study of coleopteran inclusions from Spanish （Albian in age） and French （Albian-Santonian in age） Cretaceous ambers, both of laurasian origin, has revealed that the majority of samples belong to the Polyphaga suborder and, in contrast to the case of the compression fossils, only one family of Archostemata, one of Adephaga, and no Myxophaga suborders are represented. A total of 30 families from Spain and 16 families from France have been identified （with almost twice bioinclusions identified in Spain than in France）; 13 of these families have their most ancient representatives within these ambers. A similar study had previously only been performed on Lebanese ambers （Barremian in age and Gondwanan in origin）, recording 36 coleopteran families. Few lists of taxa were available for Myanmar （Burmese） amber （early Cenomanian in age and laurasian in origin）. Coleopteran families found in Cretaceous ambers share with their modern relatives mainly saproxylic and detritivorous habits in the larval or adult stages, rather than wood-boring behavior. Fifteen of the coleopteran families occur in both the Lebanese and Spanish ambers; while only five are present in both Spanish and French. Considering the paleogeographic proximity and similarity of age of the Spanish and French ambers, the small number of taxa found in common at both areas is surprising. The ancient origin for the Lebanese and Spanish ambers, the paleogeography （including some barriers for terrestrial biota） and the local paleohabitats are factors that may explain the dissimilarity with the French specimens. Wildfires are believed to be a more likely cause of resin production during the Cretaceous than infestation by beetles. Current knowledge of the beetle species found in the Cretaceous ambers is introduced.

关键词： Beetle Fossil laurasia Gondwana Resin production

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Herbaceous eudicot Fairlingtonia from Lower Cretaceous of Yumen,Northwest China,and its paleogeographic significance

Herbaceous eudicot Fairlingtonia from Lower Cretaceous of Yu...

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中国古生物学会古植物学分会、江苏省古生物学会2021年学术年会

作者： DU Baoxia ZHANG Mingzhen ZHANG Jing ZHANG Mingchen LI Aijing HUI Jianguo MA Guorong Key Laboratory of Western China's Mineral Resources of Gansu Province Lanzhou University Key Laboratory of Petroleum Resources of Gansu Province Northwest Institute of EcoEnvironment and ResourcesChinese Academy of Sciences School of Arts Lanzhou University

A new species,Fairlingtonia microgynum,was reported from the upper Lower Cretaceous Zhonggou Formation,Hanxia Section,Yumen City,western Gansu Province,Northwest *** is characterized by stoloniferous,multibranched stems bearing deeply dissected leaves,basally syncarpous fruits with 2 carpels,and fibrous adventitious roots;as such,it was supposed as a herbaceous eudicot similar to Papaveroideae on leaf morphology and reproductive structures,while TNT analysis can not place the present species within any raordern *** morphological characters of *** indicated that it is a colonizer of lakeshore environments under wet and bright conditions and possesses fast-growing and rapid propagation habitats,which can reproduce both sexually and ***,the fossil records of Fairlingtonia from contemporaneous sediments(late Aptian to early Albian) in Northwest China and eastern North America provide evidence of the radiative evolution of Fairlingtonia on laurasia.

关键词： eudicot Fairlingtonia late Early Cretaceous Northwest China laurasia

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