检索结果-南通市图书馆

functional morphology and Bending Characteristics of the Honeybee Forewing

Journal of Bionic Engineering 2017年第1期14卷 111-118页

作者： Yun Ma Huilan Ren Jianguo Ning Pengfei Zhang State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology Beijing 100081 China

The present work aimed to reveal the functional morphology and bending characteristics of the worker honeybee （Apis mellifera） forewing. Honeybee wings including the forewing and hindwing, which are mainly composed of veins and membranes, are a kind of typical hierarchical biomaterials. We investigated the cross-sections of membranes, veins and wing hairs through Scanning Electron Microscopy （SEM）. Based on the microscopic observation, it was found that the vein is a thick-walled cylinder, and the membrane possesses multilayered structure and so does the wing hair which shows the thread surface. At the vein-membrane conjunctive position, membranes and veins are assembled seamlessly and veins are packed smoothly and tightly by membranes into a whole, allowing honeybees to perform excellent flapping flight. In such a case, we also conducted the cantilevered bending experiment of honeybee forewing to explore their bending characteristics using a MTS Tytron 250 micro force tester. Experiment results indicate that the anti-bending capacity of the forewing along the spanwise direction is higher than that along the chordwise direction which is partly caused by the wing corrugation along the wing span detected by the micro-Computed Tomography （micro-CT）, and ventral load bearing ability is better than dorsal one along the spanwise and chordwise direction of the wing which is due to the stress-stiffening of membranes. It could be concluded that the structural configuration of the wing is closely relevant to wing biomechanical behaviors. All results above would provide a significant support for the design of bioinspired wings for Flapping Micro Aerial Vehicles （FMAV）.

关键词： honeybee forewing functional morphology hierarchical structure bending stiffness

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Affinities and functional morphology of the Middle Cambrian ornamented tubules from West Hunan,China

引用

Progress in Natural Science:Materials International 2004年第10期14卷 67-71页

作者： ZHU Caifa 1,2 and DONG Xiping 1 (1.School of Earth and Space Sciences,Peking University,Beijing100871,China 2.University of Petroleum,Beijing102249,China) Peking Univ Sch Earth & Space Sci Beijing 100871 Peoples R China Univ Petr Beijing 102249 Peoples R China

Problematic phosphatic tubular microfossils with ornamented sculptures are documented to exist in limestones of the up-per Middle Cambrian Huaqiao Formation at the Paibi section and the Wangcun section in West Hunan,*** morphological pat-terns,including Ornamented Tube Form I and Ornamented Tube Form II are *** on the analysis of the preservation,wall structure and composition of the fossils,it is deduced that these ornamented tubes may represent carapace spines of some Cambrian arthro-pods with phosphatic carapaces,such as bradoriid *** of functional morphology indicates that the sclerites may rather be considered of a defensive than grasping function on the original organism body.

关键词： Middle Cambrian ornamented tubes affinities functional morphology West Hunan

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Phosphatized rare star-like mouth disc of Punctatus and its functional morphology from the earliest Cambrian of the South Shaanxi China

引用

Frontiers in Biology 2008年第1期3卷 106-112页

作者： Yunhuan LIU Yong LI Tiequan SHAO Zhixin ZHU Wanqian ZHANG Zhuo WANG Weixian YANG Rongxi LI Earth Science Faculty Chang’an UniversityXi’an 710054China Chinese Academy of Geological Sciences Beijing100037China

The Meishucun stage is the prelude in decipher-ing the Cambrian *** this prominent stage,rapid radioactive evolution and body-plan innovation have taken place and different associations of organism have been *** this paper we report several 3D-preserved rare star-like fossils with finely preserved soft tissues which were recovered from the Kuanchuanpu Member of the Dengying Formation in South Shaanxi,China in *** studying on functional morphology and analogy with mouthpart of Punctatus,there are evidences that this star-like organism approaches the coelenterates in systematic classification and the centre of star-like organism is its *** appearance of coelenterates marks the real beginning of metazoan ***,it has the prominent position in the origin and evolutionary history of *** the star-like organism represents the early types of coelenterate with original *** new materials provide new evidence for the origin,evolution and the functional evolution of the metazoan during the early stage of the Cambrian Explosion.

关键词： rare star-like mouth disc Punctatus coelenterat functional morphology Kuanchuanpu Member of the Dengying Formation Ningqiang Shaanxi

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Postcranial disparity of galeaspids and the evolution of swimming speeds in stem-gnathostomes

引用

National Science Review 2023年第7期10卷 81-90页

作者： Zhikun Gai Xianghong Lin Xianren Shan Humberto G.Ferrón Philip C.J.Donoghue Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences Institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences University of Chinese Academy of Sciences Bristol Palaeobiology Group School of Earth Sciences University of Bristol Instituto Cavanilles de Biodiversidad i Biología Evolutiva Universitat de València

Galeaspids are extinct jawless relatives of living jawed vertebrates whose contribution to understanding the evolutionary assembly of the gnathostome bodyplan has been limited by absence of postcranial ***,we describe Foxaspis novemura *** ***.,based on complete articulated remains from a newly discovered Konservat-Lagerstatte in the Early Devonian(Pragian,～410 Ma) of Guangxi,South China.F,novemura had a broad,circular dorso-ventrally compressed headshield,slender trunk and strongly asymmetrical hypochordal tail fin comprised of nine ray-like scale-covered *** tail morphology contrasts with the symmetrical hypochordal tail fin of Tujiaaspis vividus,evidencing disparity in galeaspid postcranial *** of swimming speed reveals galeaspids as moderately fast swimmers,capable of achieving greater cruising swimming speeds than their more derived jawless and jawed *** analyses reject the hypothesis of a driven trend towards increasingly active food acquisition which has been invoked to characterize early vertebrate evolution.

关键词： Galeaspida jawed vertebrates evolution functional morphology phylogenetics modelling

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Myological variation in the hindlimb of three raptorial birds in relation to foraging behavior

引用

Avian Research 2022年第3期13卷 390-397页

作者： Xinxin Liang Mingjie Liu Chenxi Ying Zihui Zhang College of Life Sciences Capital Normal UniversityBeijing100048China

Raptors share a common predatory lifestyle,but are different in food preferences and hunting *** grip force and talons’grasping capabilities are fundamentally crucial for subduing and killing their prey to feed,but the abilities and differences to generate force are less *** this study,the entire pelvic muscles were dissected with the muscle mass and fibre length measured and physiological cross-sectional area counted in the Common Kestrel(Falco tinnunculus),Eurasian Sparrowhawk(Accipiter nisus),and Long-eared Owl(Asio otus).Statistical tests were performed to explore the possible differences in architectural parameters among *** species were same in distributing the greatest proportion of muscle mass to the shank region and the digital flexor functional group,allocating more than 60%muscle mass in relation to total single leg muscle mass to the same seven individual muscles including flexor digitorum longus(FDL),flexor hallucis longus(FHL),and tibialis cranialis(TC)which are three major muscles responsible for talon *** differentiations were most present in the shank and tarsus instead of other regions of the leg,which might reflect their difference in hunting mode and foot *** force-generation capacity of FHL and some anatomical features suggest that digits 1and 2 work together as an efficiently vise-like set,playing more critical role than digits 3–4 in foraging of diurnal raptors but to a different *** accordance with zygodactyl foot morphology,each digit of the Long-eared Owl plays a subequal role when hunting,evidenced by anatomical and architectural *** of its unique insertion to the base of the pygostyle,the striking numerical difference in the development of *** was possibly related to raptors’flight behavior and feeding *** from anatomical and architectural aspects,the similarities and differences of the hindlimb musculature were correlated to common predatory li

关键词： Architecture Birds of prey functional morphology Grip force Pelvic muscles Talon closure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A new chelonibiid from the Miocene of Zanzibar (Eastern Africa) sheds light on the evolution of shell architecture in turtle and whale barnacles (Cirripedia: Coronuloidea)

引用

Integrative Zoology 2022年第1期17卷 24-43页

作者： Alberto COLLARETA William A.NEWMAN Giulia BOSIO Giovanni COLETTI Dipartimento di Scienze della Terra Universitàdi PisaPisaItaly Museo di Storia Naturale Universitàdi PisaCalciItaly MBRD Scripps Institution of OceanographyLa JollaCaliforniaUSA Dipartimento di Scienze dell’Ambiente e della Terra Universitàdegli Studi di Milano-BicoccaMilanoItaly

The fossil history of turtle and whale barnacles(Coronuloidea:Chelonibiidae,Platylepadidae,Coronulidae and†Emersoniidae)is fragmentary and has only been investigated in *** inferences and molecular phylogenetic analyses on extant specimens suggest that the roots of whale barnacles(Coronulidae)are to be found among the chelonibiid turtle barnacles,but the hard-part modifications that enabled early coronuloids to attach to the cetacean skin are still largely to be ***,we reappraise a fossil chelonibiid specimen from the Miocene of insular Tanzania that was previously referred to the living species Chelonibia *** largely forgotten specimen is here described as the holotype of the new species†Chelonibia *** similar to ***,†*** exhibits obvious external longitudinal parietal canals occurring in-between external longitudinal parietal septa that abut outwards to form T-shaped flanges,a character so far regarded as proper of the seemingly more derived Coronulidae and *** with these features,the presence of a substrate imprint on the shell exterior indicates that†*** grasped its host’s integument in much the same way as coronulids and platylepadids,albeit without the development of macroscopic parietal buttresses and *** section analyses of the inner parietal architecture of some extant and extinct coronuloids conclusively demonstrate that vestiges of comparable external parietal microstructures are present in some living members of *** observation strengthens the unity of Coronuloidea while significantly contributing to our understanding of the evolution of the coronuloid shell structure in adapting to a diverse spectrum of hosts.

关键词： †Chelonibia zanzibarensis sp.nov. epibiosis evolution functional morphology systematics

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Morphological responses of three persistent native anuran species after forest conversion into monoculture pine plantations:tolerance or prosperity?

引用

Integrative Zoology 2020年第5期15卷 428-440页

作者： Elena GANGENOVA Mariano IGIOMBINI Gustavo AZURITA Federico MARANGONI Instituto de Biología Subtropical Universidad Nacional de Misiones–CONICETPuerto IguazúMisionesArgentina Facultad de Ciencias Forestales Universidad Nacional de MisionesEldoradoMisionesArgentina Departamento de Biología Facultad de Ciencias ExactasNaturales y AgrimensuraUniversidad Nacional del Nordeste(UNNE)CorrientesArgentina

Species loss by habitat replacement operating as an ecological filter is a well-known consequence of modern human activities. In contrast, the ecological and evolutionary response of species overcoming those filters in convertedhabitats has not been thoroughly explored. Species that persist are subject to novel and potentially stressful conditions that may induce certain morphological changes. We evaluated changes in the functional morphology of threeanuran species persisting after the conversion of areas of the Atlantic Forest into pine plantations. We specificallyevaluated differences in body size and body condition indices, head width, and hind legs’ length between adultindividuals from both habitats and sexes. Habitat conversion and sexual dimorphism affected the morphology ofthe three anurans, with varying effects upon species and traits. Regarding the effect of habitat conversion, Elachistocleis bicolor increased body condition in plantations with no changes in the other traits, Physalaemus cuvierishowed only a marginal increment in residual body mass in plantations, and Odontophrynus americanus exhibiteda substantial increment in body size while maintaining its body condition in plantations. Remarkably, none of theresults suggested these persistent anurans were stressed by forest conversion. This study shows that habitat conversion may induce intraspecific morphological changes in ecologically relevant traits of persistent species, andthat disturbed areas do not necessarily imply stressful, low quality habitats affecting all persistent native speciesnegatively.

关键词： amphibian Atlantic forest body condition functional morphology habitat replacement phenotypic plasticity

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

functional correlates of skull shape in Chiroptera:feeding and echolocation adaptations

引用

Integrative Zoology 2022年第3期17卷 430-442页

作者： Giada GIACOMINI Anthony HERREL Gloriana CHAVERRI Richard P.BROWN Danilo RUSSO Dino SCARAVELLI Carlo MELORO Research Centre in Evolutionary Anthropology and Palaeoecology School of Biological and Environmental SciencesLiverpool John Moores UniversityUK Département d’Ecologie et de Gestion de Paris C.N.R.S/M.N.H.N.ParisFrance Recinto de Golfito Universidad de Costa RicaGolfitoCosta Rica Smithsonian Tropical Research Institute BalboaAncónRepública de Panamá Wildlife Research Unit Dipartimento di AgrariaUniversitàdegli Studi di Napoli Federico IIPorticiItaly School of Biological Sciences Life Sciences BuildingUniversity of BristolBristolUK Department of Veterinary Medical Sciences University of BolognaOzzano dell’EmiliaItaly

Morphological,functional,and behavioral adaptations of bats are among the most diverse within mammals.A strong association between bat skull morphology and feeding behavior has been suggested ***,morphological variation related to other drivers of adaptation,in particular echolocation,remains *** assessed variation in skull morphology with respect to ecology(diet and emission type)and function(bite force,masticatory muscles and echolocation characteristics)using geometric morphometrics and comparative *** study suggests that variation in skull shape of 10 bat families is the result of adaptations to broad dietary categories and sound emission types(oral or nasal).Skull shape correlates with echolocation parameters only in a subsample of insectivorous species,possibly because they(almost)entirely rely on this sensory system for locating and capturing *** emitting low frequencies are characterized by a ventrally tilted rostrum,a trait not associated with feeding *** result questions the validity of a trade-off between feeding and echolocation *** study advances understanding of the relationship between skull morphology and specific features of echolocation and suggests that evolutionary constraints due to echolocation may differ between different groups within the Chiroptera.

关键词： diet echolocation functional morphology geometric morphometrics macroevolution

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A superarmoured lobopodian from the Cambrian Stage 4 of southern China

引用

Science Bulletin 2016年第17期61卷 1372-1376页

作者： De-Guang Jiao Jie Yang Xi-Guang Zhang Key Laboratory for Palaeobiology Yunnan University Kunming 650091 China Yunnan Vocational College of Land and Resources Kunming 650217 China

A superarmoured lobopodian Collinsium *** the Cambrian(Stage 4) Wulongqing Formation in Kunming clearly exhibits dorsal sets of sclerotized spines,suspension feeding appendages with spiniform setae,and annulated walking limbs with a terminal *** distinctive body configuration reinforces the remarkable appendage specialization associated with feeding and locomotion and overall morphological disparity in lobopodians during the Cambrian *** finding extends the geographic and stratigraphic ranges of "Collins' monster"-like lobopodians,and provides additional information for a better understanding of the cryptic stemgroup Onychophora.

关键词： Lobopodians Body architecture functional morphology Cambrian Stage 4 Onychophora Evolution

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：