搜索到278篇“ ARTHROPODA“的相关文章
节肢动物吐卓虫咬痕化石在云南昆明附近寒武纪早期关山生物群的发现及意义
2024年
本文报道了一块来自云南省昆明市附近寒武纪第二世第四期关山生物群具咬痕的双瓣壳节肢动物吐卓虫(Tuzoia)化石,系吐卓虫咬痕化石在全球范围的首次发现。该发现证实作为主动捕食者的吐卓虫很可能被大型捕食者(如奇虾类或莱德利基虫类三叶虫等)捕食,说明寒武纪早期的海洋生物群落已经具有高度复杂化的食物链,为进一步了解吐卓虫的生态位及深入探讨寒武纪大爆发时期海洋生态系统食物网结构提供了新的信息。
董存治宋子瑜刘旭辉胡世学
关键词:咬痕寒武纪早期食物网
An early Cambrian Sidneyia(Arthropoda) resolves the century-long debate of its head organization
2023年
We report the extraordinarily preserved euarthropod Sidneyia minor sp.nov.from the Cambrian Stage 3 Xiaoshiba Lagerst?tte in Yunnan,South China.So far this is the earliest occurrence of the genus.As with other species of Sidneyia,the new taxon shares similar features such as a crescent-shaped head shield with paired lateral notches for stalked eyes,but more significantly and new,is the presence of three pairs of post-antennal appendages beneath the head shield identified by micro-CT methods.We conclude that Sidneyia is a sister group to other members of Vicissicaudata within the diverse radiation of Artiopoda.
Kunsheng DUDavid L.BRUTONJie YANGXiguang ZHANG
关键词:PHYLOGENETICS
寒武纪早期节肢动物西德尼虫(Sidneyia)争议百年的头部结构得到澄清
2023年
文章报道了产自云南寒武系第三阶小石坝生物群的小西德尼虫新种(Sidneyia minor sp.nov.),为西德尼虫属(Sidneyia)目前所发现的最古老物种.该新种具有其他已知小西德尼虫的一些典型特征,如新月形的头甲两侧后部具眼窝(notches),柄眼从眼窝处伸出,此外,最重要而且从未知晓的是显微-CT检测显示的头甲下3对触角后头部附肢.文章基于小西德尼虫新种和模式种的特征以及谱系分析结果,确认西德尼虫类与其他的异尾虫类(vicissicaudatans)构成姊妹群,归属物种显著分异的类肢动物(Artiopoda).
杜坤省David L.BRUTON杨杰张喜光
Mitochondrial phylogenomics provides insights into the phylogeny and evolution of spiders(Arthropoda:Araneae)
2022年
Spiders are among the most varied terrestrial predators,with highly diverse morphology,ecology,and behavior.Morphological and molecular data have greatly contributed to advances in the phylogeny and evolutionary dynamics of spiders.Here,we performed comprehensive mitochondrial phylogenomics analysis on 78 mitochondrial genomes(mitogenomes)representing 29 families;of these,23 species from eight families were newly generated.Mesothelae retained the same gene arrangement as the arthropod ancestor(Limulus polyphemus),while Opisthothelae showed extensive rearrangement,with 12 rearrangement types in transfer RNAs(tRNAs)and control region.Most spider tRNAs were extremely truncated and lacked typical dihydrouridine or TΨC arms,showing high tRNA structural diversity;in particular,trnS1 exhibited anticodon diversity across the phylogeny.The evolutionary rates of mitochondrial genes were potentially associated with gene rearrangement or truncated tRNAs.Both mitogenomic sequences and rearrangements possessed phylogenetic characteristics,providing a robust backbone for spider phylogeny,as previously reported.The monophyly of suborder,infraorder,retrolateral tibial apophysis clade,and families(except for Pisauridae)was separately supported,and high-level relationships were resolved as(Mesothelae,(Mygalomorphae,(Entelegynae,(Synspermiata,Hypochilidae)))).The phylogenetic positions of several families were also resolved(e.g.,Eresidae,Oecobiidae and Titanoecidae).Two reconstructions of ancestral web type obtained almost identical results,indicating that the common ancestor of spiders likely foraged using a silk-lined burrow.This study,the largest mitochondrial phylogenomics analysis of spiders to date,highlights the usefulness of mitogenomic data not only for providing efficient phylogenetic signals for spider phylogeny,but also for characterizing trait diversification in spider evolution.
Min LiWen-Ting ChenQi-Lin ZhangMin LiuCheng-Wei XingYa CaoFang-Zhen LuoMing-Long Yuan
关键词:PHYLOGENOMICS
First mixopterid eurypterids(Arthropoda:Chelicerata)from the Lower Silurian of South China
2021年
Eurypterids,or sea scorpions,are an important group of midPaleozoic chelicerate arthropods whose evolution and palaeoecological significance have attracted much attention in recent years[1–3].One of the most remarkable eurypterid families is Mixopteridae,whose members are quite large and superficially scorpion-like eurypterids bearing highly specialized anterior appendages.Their second,and especially the third,pair of prosomal limbs are enlarged and very spiny.These limbs were presumably used for prey-capture,and analogies can be drawn with the “catching basket”[4]formed by the spiny pedipalps of whip spiders(Amblypygi)among the arachnids.
Han WangJason DunlopZhikun GaiXiaojie LeiEdmund A.JarzembowskiBo Wang
关键词:捕食能力冈瓦纳大陆附肢化石记录早志留世
陕西洛南龙牙洞发现中更新世马陆化石被引量:1
2021年
马陆,又称千足虫,分布广泛,有时甚至爆发性泛滥[1],给人们的生活造成很大影响。关于这种动物的早期化石信息主要集中在欧美的研究报道[2~3],近年来人们从缅甸、墨西哥琥珀中也发现了一些中、新生代的马陆化石,如现生倍足纲中的Polyxenida(毛马陆目)、Siphonophorida(管马陆目)、Polyzoniida(多板马陆目)、Julida(姬马陆目)、Chordeumatida(泡马陆目)、Stemmiulida(寡眼马陆目)、Polydesmida(带马陆目)、Siphoniulida等[3~5],但晚新生代、第四纪期间很少报道。中国现代马陆动物研究时有报道[6~21],但化石却十分罕见,仅见于20世纪50年代初第四纪周口店猿人洞穴堆积中的一次记录[22]。
李永项胡松梅李冀王社江张云翔谢坤陈宇李兆雨
关键词:中更新世洞穴堆积倍足纲晚新生代
Two new species of Protura(Arthropoda:Hexapoda)from Zhejiang,East China
2020年
Two new species of Protura are described:Baculentulus wenyingae sp.nov.and Pseudanisentomon lishuiensis sp.nov.Baculentulus wenyingae sp.nov.is characterized by the combined characters of the presence of foretarsal sensillum b',differentiated sensilla on the maxillary palp,leaf-shaped sensillum on the labial palp,absence of P1a seta on tergites I–VI,eight anterior setae on tergite VI and 4/18 chaetotaxy on tergite VII.An updated key to the 13 Baculentulus species from China is also provided.Pseudanisentomon lishuiensis sp.nov.is characterized by the absence of foretarsal sensillum b'-2,b longer than c,the empodial appendage of II and III leg very short,the tergite I with 12 posterior setae,tergites V–VII lack seta A3,and sternites VIII–X with 2/7-4-4 chaetotaxy respectively.It was compared with the affiliated species P.guangxiensis(Yin&Zhang,1982)in detail.In addition,a checklist and the distribution of 39 Protura species from Zhejiang Province are provided,and the Protura fauna in Zhejiang is also discussed.
Yun BUYan GAOYunxia LUAN
关键词:SENSILLUMCHAETOTAXY
缨翅目昆虫线粒体基因组的结构特征与比较分析
2020年
缨翅目物种是一类具有重要经济意义的微小昆虫。截至目前,GenBank数据库中共收录2科7属9种10条蓟马全线粒体基因组序列。现综述缨翅目昆虫线粒体基因组已有的研究成果,比较分析其基因组特征,包括基因大小、基因组成及重排、碱基组成、密码子使用、蛋白质编码基因、RNA基因、非编码区等;最后,对目前研究中存在的问题进行讨论,并对未来研究进行展望,为进一步系统地研究缨翅目昆虫线粒体基因组等提供了新思路。
谢丹乐王夏赵乐党利红
关键词:缨翅目线粒体基因组基因重排系统发育
直翅目昆虫线粒体基因组特征及系统发育研究被引量:12
2018年
目前GenBank数据库共收录167种直翅目昆虫全线粒体基因组序列,涉及蝗亚目9个总科22个科99个物种,螽亚目7个总科12个科68个物种。在此基础上,该文分析了直翅目昆虫线粒体基因组的基本特征,概述了线粒体全基因组在直翅目昆虫系统发育研究上的应用;同时基于线粒体全基因组序列重建了直翅目昆虫的系统发育关系。主要结果如下:(1)直翅目昆虫存在8种线粒体基因组排列类型,其中trnK-trnD重排现象仅发生在蝗总科中,trnN-trnS-trnE重排现象仅发生在蟋蟀总科中,trnM-trnI-(-trnQ)重排现象仅发生在拟叶蟲亚科中;(2)直翅目昆虫全线粒体基因组的碱基组成具有明显的AT偏向性;(3)不同的蛋白质编码基因在直翅目昆虫中的进化速率不同;(4)支持直翅目以及螽亚目和蝗亚目的单系性;(5)不支持沙螽总科单系性;(6)支持蝗亚目各总科阶元的单系性,且各总科间的系统发育关系为:(蚤蝼总科+(蚱总科+(?蜢总科+(蜢总科+(长角蝗总科+(牛蝗总科+叶翅蝗总科)+(锥头蝗总科+蝗总科))))))。
赵乐李雪娟黄原
关键词:直翅目线粒体基因组比较基因组进化
贵州剑河寒武系“清虚洞组”高肌虫类清泉虫Qingquanella Cui et Huo,1985的初步研究
2018年
本文描述了贵州剑河八郎寒武系第二统第四阶"清虚洞组"剑河生物群的高肌虫化石。化石壳体呈圆形,背边平直,前、后背角均钝,壳前背部具有"V"形槽。符合Qingquanella Cui et Huo,1985的属征,与模式种湖北清泉虫Q.hubeiensis相似,将其厘定为湖北清泉虫相似种Q.cf.hubeiensis。本属产于湖北水井沱组、石牌组及陕西辛集组,黔东地区"清虚洞组"发现清泉虫Qingquanella,增加了清泉虫的产地信息、新的类群,其壳体形态由切卵变圆形,生态环境由浅水向深水变化,为高肌虫的形态分类、早期演化与辐射分异提供新的材料。
杨光福赵元龙陈婉怡张源陈争鹏
关键词:高肌虫寒武系

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欧强
作品数:28被引量:81H指数:5
供职机构:中国地质大学(北京)
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沙忠利
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孔令富
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高元奇
作品数:25被引量:66H指数:5
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