Lower brachyceran flies are abundant in the Late Mesozoic of China.Many extant and extinct members of that have been found in Inner Mongolia,Liaoning,Hebei and Shandong provinces. A new family,Origoasilidae fam.nov.,b...Lower brachyceran flies are abundant in the Late Mesozoic of China.Many extant and extinct members of that have been found in Inner Mongolia,Liaoning,Hebei and Shandong provinces. A new family,Origoasilidae fam.nov.,belonging to the lower Brachycera,is built based on a new specimen from the Yixian Formation and is a representative of the Jehol Biota.The new endemic Mesozoic family possesses several unique characters in the wing.The relationship among the Origoasilidae fam.nov.and relative known lower brachyceran flies has been discussed.展开更多
Despite extensive studies on the morphology of holometabolous insects and their larvae,the morphological transformations of internal structures during metamorphosis have been rarely documented.Here,we used micro-compu...Despite extensive studies on the morphology of holometabolous insects and their larvae,the morphological transformations of internal structures during metamorphosis have been rarely documented.Here,we used micro-computed tomography to investigate the developmental transformations of thoracic structures in the green lacewing Chrysopa pallens(Rambur,1838)(Neuroptera:Chrysopidae),with emphasis on the development of the digestive,tracheal,and thoracic skeleto-muscular system.All the adult organs were modified during the prepupal or early pupal stage.The histolysis and remodeling began with the skeletal elements,followed by changes in the digestive system before it concluded with modifications of the musculature.Similar to the tracheal system’s development,the digestive system did not disappear completely throughout metamorphosis but underwent a dramatic morphological change,which included the midgut significantly decreasing in size during the pupal stage.Our results provide important evidence for understanding the evolutionary pattern of developmental transformations in different major lineages of Holometabola.展开更多
基金supported by the National Natural Science Foundation of China(No.41102006,30430100,30225009)Nature Science Foundation of Beijing(No.5082002)the Funding Project for Academic Human Resources under the Jurisdiction of Beijing Municipality
文摘Lower brachyceran flies are abundant in the Late Mesozoic of China.Many extant and extinct members of that have been found in Inner Mongolia,Liaoning,Hebei and Shandong provinces. A new family,Origoasilidae fam.nov.,belonging to the lower Brachycera,is built based on a new specimen from the Yixian Formation and is a representative of the Jehol Biota.The new endemic Mesozoic family possesses several unique characters in the wing.The relationship among the Origoasilidae fam.nov.and relative known lower brachyceran flies has been discussed.
基金This study was supported by the National Natural Science Foundation of China(32100359,32130012)the Technological Innovation Programs of Higher Education Institutions in Shanxi(2021L430)the China Scholarship Council,which enabled CJZ to spend 12 months as a joint student at the National University of Singapore,hosted by RM.
文摘Despite extensive studies on the morphology of holometabolous insects and their larvae,the morphological transformations of internal structures during metamorphosis have been rarely documented.Here,we used micro-computed tomography to investigate the developmental transformations of thoracic structures in the green lacewing Chrysopa pallens(Rambur,1838)(Neuroptera:Chrysopidae),with emphasis on the development of the digestive,tracheal,and thoracic skeleto-muscular system.All the adult organs were modified during the prepupal or early pupal stage.The histolysis and remodeling began with the skeletal elements,followed by changes in the digestive system before it concluded with modifications of the musculature.Similar to the tracheal system’s development,the digestive system did not disappear completely throughout metamorphosis but underwent a dramatic morphological change,which included the midgut significantly decreasing in size during the pupal stage.Our results provide important evidence for understanding the evolutionary pattern of developmental transformations in different major lineages of Holometabola.
