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Oldest Known Bony Fish Fossils Uncover Early Vertebrate Evolution 认领 引用
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《Bulletin of the Chinese Academy of Sciences》 2026年第1期62-64,共3页
A research team led by Profs.ZHU Min, LU Jing, and ZHU You’an from the Institute of Vertebrate Paleontology and Paleoanthropology (IVPP) of the Chinese Academy of Sciences published two back-to-back cover stories in ... A research team led by Profs.ZHU Min, LU Jing, and ZHU You’an from the Institute of Vertebrate Paleontology and Paleoanthropology (IVPP) of the Chinese Academy of Sciences published two back-to-back cover stories in the journal Nature on March 4, reporting new discoveries about the origin of bony fishes. 展开更多
关键词 journal nature institute vertebrate paleontology paleoanthropology bony fishes chinese academy sciences oldest known bony fish fossils early vertebrate evolution vertebrate paleontology paleoanthropology research team
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Career of Chang Meemann and her contributions to vertebrate paleontology 认领 引用
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作者 ZHU Min ZHU You-An 《古脊椎动物学报（中英文）》 CSCD 北大核心 2026年第2期125-136,共12页
Over more than six decades of dedicated research,Chang Meemann’s career has spanned a critical era marked by a paradigm shift in vertebrate evolution studies.Beginning in the 1950s,inspired by the pioneering ichthyol... Over more than six decades of dedicated research,Chang Meemann’s career has spanned a critical era marked by a paradigm shift in vertebrate evolution studies.Beginning in the 1950s,inspired by the pioneering ichthyologists of the older generation,including Wu Xianwen,O.P.Obrucheva,and E.Stensiö,she conducted systematic investigations of fish fossils preserved in Paleozoic,Mesozoic,and Cenozoic strata across China.Her work yielded landmark achievements across multiple research domains:the evolution of early vertebrates,the phylogeny of sarcopterygians(lobe-finned fishes),the biostratigraphy and faunal evolution of Mesozoic-Cenozoic fishes,and the Cenozoic paleoecology of the Qinghai-Tibet Plateau as inferred from fish evolutionary patterns.A strong advocate for integrating new technologies and methodologies into fossil vertebrate research,Chang Meemann founded the“Chinese School”of early vertebrate studies,which has since gained international recognition.Her meticulous anatomical analyses of a series of Early Devonian lobe-finned fishes reshaped the classical understanding of tetrapod origins.She played a pivotal role in introducing cladistics,a then-controversial new paradigm in systematic biology,into China.Serving two terms as the director of the Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Academy of Sciences,she led the institute’s internationalization during China’s Era of Reform and Opening-up.Under her leadership,a new generation of scientists was guided into the study of some of the world’s most significant fossil biotas,such as the Jehol Biota.Through her lifelong dedication,Chang Meemann elevated China’s fossil vertebrate research to a world-leading level. 展开更多
关键词 Chang Meemann paleoichthyology vertebrate evolution cladistics Qinghai-Tibet Plateau uplift Jehol Biota
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Stratigraphy and Geochronology of Vertebrate Fossil-Bearing Jurassic Strata from Linglongta,Jianchang County,Western Liaoning,Northeastern China 认领 引用 被引量：8
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作者 PENG Nan LIU Yongqing +2 位作者 KUANG Hongwei JIANG Xiaojun XU Huan 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2012年第6期1326-1339,共14页
Northeastern China contains widely distributed Jurassic terrestrial strata that have yielded many spectacular mammal and pterosaur fossils, in addition to feathered dinosaur fossils and more recent discoveries from Ji... Northeastern China contains widely distributed Jurassic terrestrial strata that have yielded many spectacular mammal and pterosaur fossils, in addition to feathered dinosaur fossils and more recent discoveries from Jianchang, particularly from western Liaoning. However, the fossil-bearing stratigraphic succession, regional correlation, and age estimates of the fossils found in Jianchang County and nearby areas have been contentious. Here, we report on the vertebrate fossil-bearing Jurassic stratigraphy from Linglongta, Jianchang County, western Liaoning, including a SHRIMP U-Pb zircon date unambiguously associated with the fossil horizons. The primary goal was to determine the vertebrate fossil-bearing succession. A further aim was to provide age estimations for the fossil-bearing horizon as well as the earliest appearance of feathered dinosaurs, the eutherian-placental clade, and transitional pterosaurs. Field investigations showed that the vertebrate fossil-bearing stratigraphic succession in Jianchang County mainly consists of basal andesites overlain by rhythmic tufts and tuffaceous lacustrine sediments, with the upper intermediate or acidic lavas interbedded with laminated more or less tuffaceous lacustrine deposits. This sequence correlates well with the Middle Jurassic Lanqifl＇iaojishan Formation in northeastern China. Detailed and accurate field observations showed that the well- preserved vertebrate fossils were buried in either the middle or the upper fine-grained laminated lacustrine deposits. Previous and current SHRIMP U-Pb zircon dates provide an age estimation of 161- 159 Myr for the fossil-bearing horizon and vertebrates. This indicates that the earliest appearance of feathered dinosaurs here was more than 159 Myr ago and unquestionably older than Archaeopteryx from Germany, making these the earliest known feathered dinosaurs in the world. Furthermore, the eutherian-placental clade and the known transitional pterosaurs first emerged no later than 161 Myr. The vertebrate assemblage unearthed recently from Linglongta and neighboring areas in Jianchang County belongs to the Daohugou Biota. In addition to feathered dinosaurs, this biota was characterized by mammals, primitive pterosaurs, insects, and plants and was present in Inner Mongolia, western Liaoning, and northern Hebei in northeastern China during the Middle-Late Jurassic. 展开更多
关键词 Jurassic vertebrates stratigraphy geochronology northeastern China
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Biochemical regulation of pigment motility in vertebrate chromatophores: a review of physiological color change mechanisms 认领 引用 被引量：10
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作者 Russell A. LIGON Kristen L. MCCARTNEY 《Current Zoology》 SCIE CAS CSCD 2016年第3期237-252,共16页
The fundamental unit of rapid, physiological color change in vertebrates is the dermal chromato- phore unit. This unit, comprised of cellular associations between different chromatophore types, is relatively conserved... The fundamental unit of rapid, physiological color change in vertebrates is the dermal chromato- phore unit. This unit, comprised of cellular associations between different chromatophore types, is relatively conserved across the fish, amphibian, and reptilian species capable of physiological color change and numerous attempts have been made to understand the nature of the four major chro- matophore types （melanophores, erythrophores, xanthophores, and iridophores） and their bio- chemical regulation. In this review, we attempt to describe the current state of knowledge regard- ing what classifies a pigment cell as a dynamic chromatophore, the unique characteristics of each chromatophore type, and how different hormones, neurotransmitters, or other signals direct pig- ment reorganization in a variety of vertebrate taxa. 展开更多
关键词 chromatophore hormone neurotransmitter physiological color change pigment vertebrate.
How did Jawed Vertebrates Originate and Rise? 认领 引用 被引量：2
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作者 Min Zhu Youan Zhu +3 位作者 Zhikun Gai Wenjin Zhao Tuo Qiao Jing Lu 《Journal of Earth Science》 SCIE CAS CSCD 2023年第4期1299-1301,共3页
99.8%of extant vertebrate species on Earth,including humans,possess jaws(maxilla and mandible).The group which we belong to is accordingly referred to as jawed vertebrates or gnathostomes.The origin and rise of our gr... 99.8%of extant vertebrate species on Earth,including humans,possess jaws(maxilla and mandible).The group which we belong to is accordingly referred to as jawed vertebrates or gnathostomes.The origin and rise of our group is undoubtedly one of the most critical evolutionary milestones in the history of vertebrates from fish to humans. 展开更多
关键词 Vertebrate fish doubt
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Molecular Evolutionary Rate Calculation of Hemoglobin α Chain and γ Chain at Different Stages in Vertebrate Evolution Process 认领 引用 被引量：2
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作者 龙承星 张波 马绍宾 《Agricultural Science & Technology》 CAS 2010年第9期101-104,220,共4页
Pseudogene and fibrin peptide which has rapid evolve speed and good stability are used in this study to determine the divergence date among groups.Through calculating the evolutionary rate of hemoglobin α chain,γ ch... Pseudogene and fibrin peptide which has rapid evolve speed and good stability are used in this study to determine the divergence date among groups.Through calculating the evolutionary rate of hemoglobin α chain,γ chain in vertebrate（including birds and mammals）,it is concluded that the evolutionary rate of hemoglobin α chain,γ chain is not invariable.It shows different evolutionary rates in different periods,that is,faster in early evolution stage and relatively slow in later stage. 展开更多
关键词 Molecular clock Evolutionary rate Hemoglobin Vertebrate Fibrin peptide
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New early Eocene vertebrate assemblage from western India reveals a mixed fauna of European and Gondwana affinities 认领 引用 被引量：2
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作者 Thierry Smith Kishor Kumar +6 位作者 Rajendra S.Rana Annelise Folie Floreal Sole Corentin Noiret Thomas Steeman Ashok Sahni Kenneth D.Rose 《Geoscience Frontiers》 SCIE CAS CSCD 2016年第6期969-1001,共33页
The Ypresian Cambay Shale Formation at Vastan and Mangrol lignite mines in Gujarat, western India, has yielded a rich vertebrate fauna with numerous taxa of European affinities. Here we report a new, approximately con... The Ypresian Cambay Shale Formation at Vastan and Mangrol lignite mines in Gujarat, western India, has yielded a rich vertebrate fauna with numerous taxa of European affinities. Here we report a new, approximately contemporary vertebrate assemblage from two fossiliferous layers in the nearby mine of Tadkeshwar. These layers have yielded a similar mammal fauna with the co-occurrence of the perissodactyl-like cambaytheriid Cambaytherium thewissi, the adapoid primates Marcgodinotius indicus and cf. Asiadapis cambayensis, and the hyaenodontid lndohyaenodon raoi. The presence of these species in both Vastan and Tadkeshwar mines and at different levels suggests that the deposits between the two major lignite seams represent a single land mammal age. Apart from the aforementioned species there is a new, smaller species of Cambaytherium, and a new genus and species of esthonychid tillodont. This fauna also contains the first large early Eocene vertebrates from India, including an unidentified Coryphodon-like pantodont, a dyrosaurid crocodyliform and a new giant madtsoiid snake. Among the Tadkeshwar vertebrates several taxa are of Gondwana affinities, such as Pelomedusoides turtles, dyr- osaurids, and large madtsoiids, attesting that the early Eocene was a crucial period in India during which Laurasian taxa of European affinities co-existed with relict taxa from Gondwana before the India-Asia collision. Our results suggest that terrestrial faunas could have dispersed to or from Europe during episodes of contact between the Indian subcontinent and different island blocks along the northern margin of the Neotethys, such as the Kohistan Ladakh island-arc system. Gondwana taxa might represent remnants of ghost lineages shared with Madagascar, which reached the Indian subcontinent during the late Cretaceous; alternatively they might have come from North Africa and passed along the southern margin of the Neotethys to reach the Indian subcontinent. These dispersals would have been possible as a result of favourable paleogeographic conditions such as the particular Neotethys conformation during the beginning of the early Eocene. 展开更多
关键词 Vertebrates Snakes Mammals Primates Cambay Shale Formation Ypresian
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Functional origins of the vertebrate cerebellum from a sensory processing antecedent 认领 引用 被引量：1
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作者 John MONTGOMERY David BODZNICK 《Current Zoology》 SCIE CAS 北大核心 2010年第3期277-284,共8页
The structure of the cerebellar cortex is remarkably similar across vertebrate phylogeny. It is well developed in basaljawed fishes, such as sharks and rays with many of the same cell types and organizational features... The structure of the cerebellar cortex is remarkably similar across vertebrate phylogeny. It is well developed in basaljawed fishes, such as sharks and rays with many of the same cell types and organizational features found in other vertebrategroups, including mammals. In particular, the lattice-like organization of cerebellar cortex (with a molecular layer of parallel fibres,interneurons, spiny Purkinje cell dendrites, and climbing fires) is a common defining characteristic. In addition to the cerebellarcortex, fishes and aquatic amphibians have a variety of cerebellum-like structures in the dorso-lateral wall of the hindbrain.These structures are adjacent to, and in part, contiguous with, the cerebellum. They derive their cerebellum-like name from thepresence of a molecular layer of parallel fibers and inhibitory interneurons, which has striking organizational similarities to themolecular layer of the cerebellar cortex. However, these structures also have characteristics which differ from the cerebellum. Forexample, cerebellum-like structures do not have climbing fibres, and they are clearly sensory. They receive direct afferent inputfrom peripheral sensory receptors and relay their outputs to midbrain sensory areas. As a consequence of this close sensory association,and the ability to characterise their signal processing in a behaviourally relevant context, good progress has been made indetermining the fundamental processing algorithm in cerebellar-like structures. In particular, we have come to understand thecontribution to signal processing made by the molecular layer, which provides an adaptive filter to cancel self-generated noise inelectrosensory and lateral line systems. Given the fundamental similarities of the molecular layer across these structures, coupledwith evidence that cerebellum-like structures may have been the evolutionary antecedent of the cerebellum, we address the question:do both share the same functional algorithm? [Current Zoology 56 (3): 277-284, 2010]. 展开更多
关键词 Origin Vertebrate Cerebellum
The role of Islet-1 in cell specification,differentiation,and maintenance of phenotypes in the vertebrate neural retina 认领 引用 被引量：1
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作者 Gervasio Martín-Partido Javier Francisco-Morcillo 《Neural Regeneration Research》 SCIE CAS CSCD 2015年第12期1951-1952,共2页
Many blinding diseases,such as retinitis pigmentosa,age-related macular degeneration,and glaucoma involve the permanent loss of retinal neurons,especially photoreceptors or the centrally projecting retinal ganglion ce... Many blinding diseases,such as retinitis pigmentosa,age-related macular degeneration,and glaucoma involve the permanent loss of retinal neurons,especially photoreceptors or the centrally projecting retinal ganglion cells.Stem cells have been proposed as a potential source of cells for neuronal transplantation. 展开更多
关键词 cell RGCs The role of Islet-1 in cell specification,differentiation,and maintenance of phenotypes in the vertebrate neural retina
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Meta-analysis reveals that reproductive strategies are associated with sexual differences in oxidative balance across vertebrates 认领 引用 被引量：2
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作者 David COSTANTINI 《Current Zoology》 SCIE CAS CSCD 2018年第1期1-11,共11页
Oxidative stress is a key physiological mechanism underlying life-history tradeoffs. Here, I use meta-analytic techniques to test whether sexual differences in oxidative balance are common in vertebrates and to identi... Oxidative stress is a key physiological mechanism underlying life-history tradeoffs. Here, I use meta-analytic techniques to test whether sexual differences in oxidative balance are common in vertebrates and to identify which factors are associated with such differences. The dataset included 732 effect size estimates from 100 articles （82 species）. Larger unsigned effect size （meaning larger sexual differences in a given marker） occurred in： reptiles and fish; those species that do not pro- vide parental care; and oviparous species. Estimates of signed effect size （positive values meaning higher oxidative stress in males） indicated that females were less resistant to oxidative stress than males in： reptiles while males and females were similar in fish, birds, and mammals; those species that do not provide parental care; and oviparous species. There was no evidence for a significant sexual differentiation in oxidative balance in fish, birds, and mammals. Effect size was not associ- ated with： the number of offspring; whether the experimental animals were reproducing or not; biomarker （oxidative damage, non-enzymatic, or enzymatic antioxidant）, the species body mass; the strain （wild vs. domestic）; or the study environment （wild vs. captivity）. Oxidative stress tended to be higher in females than males across most of the tissues analyzed. Levels of residual heterogeneity were high in all models tested. The findings of this meta-analysis indicate that diversification of reproductive strategies might be associated with sexual differences in oxidative balance. This explorative meta-analysis offers a starting platform for future research to investigate the rela-tionship between sex and oxidative balance further. 展开更多
关键词 antioxidants oviparity oxidative damage parental care vertebrates viviparity.
Antarctic Paleontological Heritage:Late Cretaceous–Paleogene vertebrates from Seymour(Marambio)Island,Antarctic Peninsula 认领 引用 被引量：1
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作者 Marcelo A.REGUERO 《Advances in Polar Science》 CSCD 2019年第3期328-355,共28页
Antarctica has significant environmental,scientific,historic,and intrinsic values,all of which are worth protecting into the future.This continent has a discrete number of places of scientific interest that exhibit gr... Antarctica has significant environmental,scientific,historic,and intrinsic values,all of which are worth protecting into the future.This continent has a discrete number of places of scientific interest that exhibit great potential as natural heritage sites;its geodiversity is of fundamental importance to scientific values of the continent,and the pursuit of geological and paleontological knowledge has had a strong influence on its historical values.Seymour Island was once called the‘Rosetta Stone’of Southern Hemisphere paleobiology,because this small island provides the most complete and richly fossiliferous Late Cretaceous–Paleogene sequence in Antarctica.In particular,fossil vertebrates form part of the evidence used in reconstructing the history of life on Antarctica.Paleontological heritage is considered a subset of geo-heritage that embodies both natural and historical components which has received only indirect recognition.Seymour Island is an outstanding paleontological area with high heritage value of its Late Cretaceous/Paleogene vertebrates and should be considered for geo-conservation and protection.This paper reviews vertebrate fossil occurrences and outcrops on Seymour Island and discusses some threats to these fossil sites. 展开更多
关键词 fossil vertebrates geo-heritage geo-conservation Late Cretaceous-Paleogene Seymour Island Antarctica
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The First Vertebrate Assemblage Dominated by Fishes and Turtles of the Jehol Biota in Jilin Province, NE China 认领 引用
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作者 WU Wenhao ZHOU Changfu +1 位作者 SUN Wei SUN Chunlin 《Acta Geologica Sinica(English Edition)》 SCIE CAS CSCD 2018年第5期2028-2029,共2页
Objective The Early Cretaceous sediments are well-exposed in southern Jilin Province,and yield abundant invertebrate and plant fossils,including the typical EosestheriaEphemeropsis trisetalis-Lycoptera（E-E-L）assembl... Objective The Early Cretaceous sediments are well-exposed in southern Jilin Province,and yield abundant invertebrate and plant fossils,including the typical EosestheriaEphemeropsis trisetalis-Lycoptera（E-E-L）assemblage of the Jehol Biota（Shao Tiequan et al.,2017）.However,vertebrate fossils,especially tetrapods,are extremely rare and there is no formal documents on these fossils.Recently,a new fossil site dominated by fishes and turtles has been discovered in the middle part of the 展开更多
关键词 NE China The First Vertebrate Assemblage Dominated by Fishes and Turtles of the Jehol Biota in Jilin Province
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Evidence for the independent divergence of vertebrate and high C/G ratio invertebrate mitochondria from the same origin 认领 引用 被引量：2
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作者 Kenji Sorimachi Teiji Okayasu +2 位作者 Shuji Ohhira Ichio Fukasawa Nobuhide Masawa 《Natural Science》 2012年第7期479-483,共5页
The examination of organelle nucleotide contents across a range of groups can provide insight into evolutionary history. We compared the nucleotide contents of a large number of vertebrate and high C/G ratio invertebr... The examination of organelle nucleotide contents across a range of groups can provide insight into evolutionary history. We compared the nucleotide contents of a large number of vertebrate and high C/G ratio invertebrate mitochondria in both codingon-coding regions and complete strands. For most nucleotides tested, high regression coefficients were obtained;when plotted with lines of best fit, G and T contents formed a cuneiform, and C and A contents overlapped. These findings suggest that vertebrate and high C/G ratio invertebrate mitochondria descended independently from the same origin. 展开更多
关键词 Evolution Genome Mitochondria Nucleotide Contents Vertebrate Invertebrate
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A COMPARATIVE RESEARCH OF ZYMOGRAMS OF LACTATE DEHYDROGENASE IN DIFFERENT TISSUES 0F 25 SPECIES OF VERTEBRATES 认领 引用
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作者 Chen Fengying Zeng Kewen +1 位作者 Pan Shi Yang Mingfei 《Journal of Northeast Forestry University》 1991年第1期56-64,共9页
The distribution and characteristics of LDH isoenzymes in different tissues of 25spe-cies of vertebrats were comparativety analysed by discontinuous polyacrylamide gel diskelectrophoresis,combined with experiments on ... The distribution and characteristics of LDH isoenzymes in different tissues of 25spe-cies of vertebrats were comparativety analysed by discontinuous polyacrylamide gel diskelectrophoresis,combined with experiments on heat and urea inhibition.The result showed that indifferent tissues of Cienopharyngodon idellus,Carassius,ayratus,Trichiurus haumete and Miichihysmiiuy in addition to the distribution of LDH isoenzymes,composed of A and B subuits,a E4isoenzyme band,moving very fast to the positive pole,was detectedin the eye tissue of Trichiurushaumele and a F4 isoenzyme hand,moving very slow to the positive pole,was found in liver andkidney of Cienopharyngodon idellus.The A4 isoenzyme band was found in different tisseues ofPleuronichlhys cornulus,inhabiting on the bottom of the ocean.From the amphition to the mammal,with the exception of Hyta arboreu immaculata,Chinnemys reevesii,Trioyx sinensis,Gallus gallusdomeslicus and Corvus macrorhynchos,which have special electrophoretic behaviours.In 展开更多
关键词 Vertebrate Polyacrylamide gel disk elcctrophorcsis LDH isocnzyme Tissue specificity
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Increased complexity of gene structure and base composition in vertebrates 认领 引用 被引量：1
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作者 Ying Wu Huizhong Yuan +3 位作者 Shengjun Tan Jian-Qun Chen Dacheng Tian Haiwang Yang 《Journal of Genetics and Genomics》 SCIE CAS CSCD 2011年第7期297-305,共9页
How the structure and base composition of genes changed with the evolution of vertebrates remains a puzzling question.Here we analyzed 895 orthologous protein-coding genes in six multicellular animals:human,chicken,ze... How the structure and base composition of genes changed with the evolution of vertebrates remains a puzzling question.Here we analyzed 895 orthologous protein-coding genes in six multicellular animals:human,chicken,zebrafish,sea squirt,fruit fly,and worm.Our analyses reveal that many gene regions,particularly intron and 3~UTR,gradually expanded throughout the evolution of vertebrates from their invertebrate ancestors,and that the number of exons per gene increased.Studies based on all protein-coding genes in each genome provide consistent results.We also find that GC-content increased in many gene regions(especially 5'UTR)in the evolution of endotherms,except in coding-exons.Analysis of individual genomes shows that 3t UTR demonstrated stronger length and GC-content correlation with intron than 5~UTR,and gene with large intron in all six species demonstrated relatively similar GC-content.Our data indicates a great increase in complexity in vertebrate genes and we propose that the requirement for morphological and functional changes is probably the driving force behind the evolution of structure and base composition complexity in multicellular animal genes. 展开更多
关键词 GC-content Gene structure Intron UTR Vertebrate Endotherm
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The Palestinian Terrestrial Vertebrate Fauna Preserved at the Biology Exhibitions of the Universities of the Gaza Strip 认领 引用 被引量：3
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作者 Abdel Fattah N Abd Rabou Nour J Musallam +18 位作者 Eman J Musallam Kamal E Elkahlout Kamal J Elnabris Tarek A El-Bashiti Ismail I Abdel Aziz Reham M Ishneiwra Eqbal S Radwan Hana S Saada Ashraf A Shafei Nedal A Fayyad Saleh N Mwafy Huda E Abu Amra Ramy A Abu Alajeen Mohammed F Abu Owda Randa N Alfarra Haifaa A Hassouna Reem A Hassouna Mohammed R Al-Agha Mohammed A Abd Rabou 《Research in Ecology》 CAS 2020年第4期9-21,共13页
The Gaza Strip(365 km2)of Palestine(27,000 km2)is home to a wealth of terrestrial vertebrate fauna.Some of these faunistic species find their ways to preservation at the local universities.Hence,the current stud... The Gaza Strip(365 km2)of Palestine(27,000 km2)is home to a wealth of terrestrial vertebrate fauna.Some of these faunistic species find their ways to preservation at the local universities.Hence,the current study comes to document the Palestinian terrestrial vertebrate fauna acquired by the biology exhibitions(BEs)of Al-Azhar University,Islamic University of Gaza and Al-Aqsa University that are located at the Gaza City of the Gaza Strip.The amphibians,reptiles,birds and mammals preserved at BEs of the universities in question were surveyed and scientifically classified during a three-month period extending from January to March,2012.The study showed that all BEs of local universities are underdeveloped,lacking attention and suffer from specimen scarcity and good preservation.The BE at Al-Azhar University is the best in the arrangement and preservation of bird specimens.A total number of 200 specimens belonging to 54 terrestrial vertebrate fauna species,39 families and 17 orders was recorded at BEs.Reptiles constituted 40.7%of the total species recorded,followed by birds(38.9%),mammals(14.8%)and amphibians(5.6%).The Islamic University of Gaza was considered the best in terms of the number of preserved species(39.8%),followed by Al-Azhar University(36.3%)and Al-Aqsa University(23.9%).The Common Toad(Bufo viridis)was the most preserved among the amphibian species recorded.Squamata was the biggest reptilian order,comprising 20 species(8 lizards and 12 snakes),with the Syrian Black Snake(Coluber jugularis asianus)was the commonest.The Palestine Viper(Vipera palaestinae)is endemic to Palestine and most venomous and dangerous to human health.The Great White Pelican(Pelecanus onocrotalus)was the largest Palestinian bird preserved at BE of Al-Azhar University.The Egyptian Mongoose(Herpestes ichneumon)and the Common Badger(Meles meles)were the biggest mammalian specimens preserved,while the Palestine Mole-rat(Spalax leucodon ehrenbergi)was the only Palestine endemic species encountered among the preserved mammals.Finally,the improvement of BEs of local universities and the construction of a Central Museum of Natural History is highly recommended in order to change the Palestinians’attitudes toward a sustainable ecological conservation in the Gaza Strip. 展开更多
关键词 Terrestrial vertebrate fauna Preservation Biology exhibitions Gaza universities Gaza Strip Palestine
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The inverted retina and the evolution of vertebrates:an evo-devo perspective 认领 引用 被引量：1
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作者 Francisco Javier Carreras 《Annals of Eye Science》 2018年第1期121-131,共11页
The inverted retina is a basic characteristic of the vertebrate eye.This implies that vertebrates must have a common ancestor with an inverted retina.Of the two groups of chordates,cephalochordates have an inverted re... The inverted retina is a basic characteristic of the vertebrate eye.This implies that vertebrates must have a common ancestor with an inverted retina.Of the two groups of chordates,cephalochordates have an inverted retina and urochordates a direct retina.Surprisingly,recent genetics studies favor urochordates as the closest ancestor to vertebrates.The evolution of increasingly complex organs such as the eye implies not only tissular but also structural modifications at the organ level.How these configurational modifications give rise to a functional eye at any step is still subject to debate and speculation.Here we propose an orderly sequence of phylogenetic events that closely follows the sequence of developmental eye formation in extant vertebrates.The progressive structural complexity has been clearly recorded during vertebrate development at the period of organogenesis.Matching the chain of increasing eye complexity in Mollusca that leads to the bicameral eye of the octopus and the developmental sequence in vertebrates,we delineate the parallel evolution of the two-chambered eye of vertebrates starting with an early ectodermal eye.This sequence allows for some interesting predictions regarding the eyes of not preserved intermediary species.The clue to understanding the inverted retina of vertebrates and the similarity between the sequence followed by Mollusca and chordates is the notion that the eye in both cases is an ectodermal structure,in contrast to an exclusively(de novo)neuroectodermal origin in the eye of vertebrates.This analysis places cephalochordates as the closest branch to vertebrates contrary to urochordates,claimed as a closer branch by some researchers that base their proposals in a genetic analysis. 展开更多
关键词 Cameral eye ectodermaleuroectodermal origin direct and inverted retina vertebrate/invertebrate eye evo-devo
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Vertebrated图的Hosoya指数和Merrifield指数 认领 引用
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作者 李霞丽 任海珍 《东北师大学报（自然科学版）》 CAS CSCD 北大核心 2013年第1期31-34,共4页
Pn表示n个顶点的路,在Pn的每个顶点上都悬挂m条边所得到的图称为Vn(m)图,也称为Vertebrated图,Vn(m)图是一类Gutman树.给出了Vn(m)图的Hosoya指数和Merrifield指数的递推关系及其值,这些结论可用于研究链状六角系统的完美匹配数.
关键词 Hosoya指数 Merrifield指数 Vertebrated图
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Comparative analysis of mitochondrial fragments transferred to the nucleus in vertebrate 认领 引用
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作者 Hongying Qu Fei Ma Qingwei Li 《Journal of Genetics and Genomics》 SCIE CAS 北大核心 2008年第8期485-490,共6页
Mitochondrial DNA sequences transferred to the nucleus give rise to the so-called nuclear mitochondrial DNA （numt）. In the GenBank database, 244 numts have been found in six orders of birds （Anseriformes, Columbifo... Mitochondrial DNA sequences transferred to the nucleus give rise to the so-called nuclear mitochondrial DNA （numt）. In the GenBank database, 244 numts have been found in six orders of birds （Anseriformes, Columbiformes, Falconiformes, Charadriiformes, Galliformes and Passeriformes）. Sequences alignment （NCBI-BLASTN） was carded out with mitochondrial and corresponding nuclear genome sequences in nine vertebrate species. The sequences with high homology were considered as numts. The number of numts ranged from 15 in chicken to 159 in chimpanzee. The sequences of numts in macaque, chimpanzee, and human spanned 100% of the entire mammalian mitochondrial genome. The reconstructed frequency of the mitochondrial gene transferred to the nucleus demonstrated that the rRNA genes had high frequencies than other mitochondrial genes. Using the RepeatMasker program, the transposable elements were detected in the flanking regions of each numt. The results showed that less than 5% of the flanking sequences were made up of repetitive elements in chicken. The GC content of 5＇- and 3＇-flanking regions of numts in nine species was less than 44%. The analysis of the flanking sequences provided a valuable understanding for future study on mechanism of mitochondrial gene transfer to the nucleus and the site of numt integration. 展开更多
关键词 mitochondrial DNA numts nuclear insertion flanking sequence vertebrate
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Effect of vertebrate hormones and prostaglandins on growth, silk quality and metabolic activities of Bombyx mori L 认领 引用
20
作者 Bharathi,D. 缪云根 《Journal of Zhejiang University Science》 2002年第3期344-347,共4页
The economic importance of silkworm has moved biologists to explore various intricate mechanisms of the action of vertebrate hormones. The dietary administration of several vertebrate hormones and prostaglandins enhan... The economic importance of silkworm has moved biologists to explore various intricate mechanisms of the action of vertebrate hormones. The dietary administration of several vertebrate hormones and prostaglandins enhanced both developmental and metabolic processes of silkworm, Bombyx mori L. The main objective of sericulture research is to apply the results to achieve superior quality silk and greater output, to apply lab findings to achieve desirable ecenomic results. 展开更多
关键词 Bombyx mori L Vertebrate homones Prostaglanding
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