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近金线Ba属的分类地位及金线Ba属的鉴别特征:(鲤形目:鲤科:Ba亚科) 总被引:3,自引:0,他引:3
本文根据系统学原理,提出了建立新类元的依据;并据此从分类和系统发育上论证了近金线Ba属Anchicyclocheilus Li et Lan独立成属的可能性,认为应将近金线Ba属归于金线Ba属;修订了金线Ba属Sinlcyclochailus Fang的鉴别特征。 相似文献
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广西金线Ba属一新种 总被引:2,自引:0,他引:2
描记采于广西凌云县泗城镇沙洞地下河中的金线Ba属1新种,以采集地县名命名为凌云金线BaSinocyclocheilus lingyunensis sp.nov.。新种以侧线鳞71-78对48-50;背鳍最末不分枝鳍条下半部为硬刺,后缘有锯齿对纤细柔软,光滑无锯齿等特征区别于相近种季氏金线BaS.jii Zhang etDai。 相似文献
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云南金线ba一新种及其性状的适应性:(鲤形目:鲁科) 总被引:14,自引:4,他引:10
透明金线ba,新种Sinocyclocheilus hyalinus Chen et Yang,sp.nov。生活于云南阿庐古洞的暗河中,就其性状的适应性演变序列而言,应是迄今发现的5种洞穴定居性金线ba种类中特化程度最高者。在洞穴鱼类中,类似金线ba种类普遍存在于头部的感觉突是罕见的,据此推测具2行咽齿的驼背ba属是源于金线ba的一个特化分支。 相似文献
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广西盲鱼一新种及其系统关系分析(鲤形目;鲤科:Ba亚科) 总被引:6,自引:0,他引:6
经鉴定,采自广西天峨县溶洞的盲鱼为金线Ba属一新种,依形态特征命名为叉背金线Ba Sinocyclocheilus furcodorsalis sp.nov。根据主要特征分析认为:新种适应洞穴相关环境相关性特化程度大致与鸭嘴金线Ba相当,新种及其若干近似种的物种形成,是营半穴居生活的类似生长须金线B的祖先适应辐射的结果。 相似文献
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本文根据系统学原理,提出了建立新类元的依据;并据此从分类和系统发育上论证了近金线(鱼巴)属Anchicyclocheilus Li et Lan独立成属的可能性,认为应将近金线(鱼巴)属归于金线(鱼巴)属;修订了金线(鱼巴)属Sinocyclocheilus Fang的鉴别特征. 相似文献
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1999年 11月在广西都安县下坳乡一岩洞地下水中采到 1尾鱼类标本 ,经鉴定为金线属一新种。新种与大鳞金线S .macrolepis和陆良金线S .macroscalus相近。但新种在背腹鳍相对位置以及背鳍末根不分枝鳍条后缘具锯齿等方面与上述两种存在明显差异 ;特别是该新种仅局限分布于洞穴中 ,就其生境来说也与上述两种更为不同。此外 ,新种头长与吻长和头长与眼径的比例是目前该属内已知最小的 ,眼明显偏大 ,反映出其对弱光生境条件的适应。 相似文献
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中国缨鱼属鱼类的分类整理及一新属描述(鲤形目:鲤科) 总被引:3,自引:0,他引:3
经整理我国缨鱼属鱼类仅有1种,原属于此属的种Crosscheilus bamaensis Fang和Crossocheilus liuchengensis Liang则归并于另一新属拟缨鱼属Pseudocrossocheilus gen.nov.,其上唇消失,吻皮与下唇相连,上颌与下唇相连以及口角须发达等特征与缨鱼属不同,同时其口角须发达,下唇两侧有纵行的颏汉以及下唇前缘具有显著的乳突状角质突起等 相似文献
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金线鲃属鱼类的起源及其适应演化 总被引:5,自引:0,他引:5
根据地史和东亚地区鱼类区系演化史,推测了金线属鱼类的起源时代及其与当时古地质和古气候事件的关系,认为该类群的原始祖先可能在第三纪晚期已经存在于云贵高原一带;较系统地研究了金线属鱼类的洞穴适应演化趋势,表明该类群在穴居适应过程中既表现出穴居鱼类的共同演化趋势,也表现出其独特的穴居适应方式。
相似文献
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中国特有金线鲃属鱼类研究的回顾与展望(鲤形目,鲤科) 总被引:2,自引:0,他引:2
金线鲃属鱼类是中国特有类群,几乎所有种类的生息繁衍都离不开洞穴环境,由于洞穴间的隔离作用,属内物种分化十分强烈.本文对以往有关金线鲃属的研究进行了回顾,将其研究历程分为5个不同阶段:发现期、静默期、恢复期、快速发展期和深入研究期,每个阶段都有不同的特点和代表性工作.以往的研究以分类学为主,向传统分类和系统分类两个方向开展.目前金线鲃属鱼类研究还存在一系列问题以及研究空白.未来有关的研究可在物种演化、生态学、生理学、行为学和保护生物学等多个方面深入进行. 相似文献
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Molecular phylogeny of Sinocyclocheilus (Cypriniformes: Cyprinidae) inferred from mitochondrial DNA sequences 总被引:8,自引:0,他引:8
Xiao H Chen SY Liu ZM Zhang RD Li WX Zan RG Zhang YP 《Molecular phylogenetics and evolution》2005,36(1):67-77
More than 10 species within the freshwater fish genus Sinoncyclocheilus adapt to caves and show different degrees of degeneration of eyes and pigmentation. Therefore, this genus can be useful for studying evolutionary developmental mechanisms, role of natural selection and adaptation in cave animals. To better understand these processes, it is indispensable to have background knowledge about phylogenetic relationships of surface and cave species within this genus. To investigate phylogenetic relationships among species within this genus, we determined nucleotide sequences of complete mitochondrial cytochrome b gene (1140 bp) and partial ND4 gene (1032 bp) of 31 recognized ingroup species and one outgroup species Barbodes laticeps. Phylogenetic trees were reconstructed using maximum parsimony, Bayesian, and maximum likelihood analyses. Our phylogenetic results showed that all species except for two surface species S. jii and S. macrolepis clustered as five major monophyletic clades (I, II, III, IV, and V) with strong supports. S. jii was the most basal species in all analyses, but the position of S. macrolepis was not resolved. The cave species were polyphyletic and occurred in these five major clades. Our results indicate that adaptation to cave environments has occurred multiple times during the evolutionary history of Sinocyclocheilus. The branching orders among the clades I, II, III, and IV were not resolved, and this might be due to early rapid radiation in Sinocyclocheilus. All species distributed in Yunnan except for S. rhinocerous and S. hyalinus formed a strongly supported monophyletic group (clade V), probably reflecting their common origins. This result suggested that the diversification of Sinocyclocheilus in Yunnan may correlate with the uplifting of Yunnan Plateau. 相似文献
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The endemic Chinese cavefish genus Sinocyclocheilus possesses very rich species diversity. Specimens of this genus collected from Guilin, Guangxi, China, were originally described
in an unpublished document in 1982. Later, they were recognized as Sinocyclocheilus jii. Comparison to the type specimens of S. jii leads to the conclusion that, though similar, they represent two different species. Herein we describe them as a new species,
Sinocyclocheilus guilinensis sp. nov. It can be distinguished from all congeners by its possession of soft, unbranched dorsal ray without serrations,
19–20 (11–12) scale rows above (below) the lateral line, 34–36 circumpeduncular scales and 8–9 pre-dorsal vertebrae. Sinocyclocheilus guilinensis sp. nov. is most similar to S. jii. In addition to the scale count differences, a morphometrics-based principal component analysis (PCA) also supports designation
of S. guilinensis and S. jii as two distinct species. 相似文献
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A new species of Barbine genus Sinocyclocheilus (Teleostei: Cyprinidae) from Zuojiang River drainage in Guangxi, China 总被引:1,自引:0,他引:1
A new species of the genus Sinocyclocheilus is described based on specimens collected from Zuojiang River drainage, Guangxi, China. The new species, named Sinocyclocheilus jinxiensis, is distinguished from all congeners by its vestigial eyes, short barbels, long pectoral fin, eight to nine branched dorsal-fin rays, last unbranched dorsal-fin ray soft with serrations on posterior edge of its lower part, and 38–41 lateral line scales. 相似文献
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中国广西金线鲃属鱼一新种(鲤形目,鲤科) 总被引:1,自引:0,他引:1
2011年7月,在中国广西隆林县天生桥镇红水河水系一洞穴采集到2尾标本。经鉴定为金线鲃属Sinocyclocheilus 1新种,曲背金线鲃Sinocyclocheilus flexuosdorsalis sp.nov.。新种背鳍分支鳍条8根,头背部交界处隆起,具前突状结构,并向下贴近顶骨。吻较长。这些特征可与属内其他种相区别。 相似文献
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Jinqing Huang Andrew Gluesenkamp Danté Fenolio Zhiqiang Wu Yahui Zhao 《Environmental Biology of Fishes》2017,100(11):1483-1488
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A new species of the cavefish genus Sinocyclocheilus is described based on six specimens collected from a subterranean river in Du’an County in the Guangxi Zhuang Autonomous
Region of southern China. Sinocyclocheilus brevibarbatus sp. nov. can be distinguished from all congeners by the following combination of characteristics: a completely scaled body
with well-developed eyes and a strongly-humped back; an almost straight lateral line possessing 49–51 perforated scales; seven
soft rays on the dorsal fin; a relatively large eyeball (3.3–5.7% of SL) and short maxillary and rictal barbels (1.7–5.7%
and 4.5–7.0% of SL, respectively). 相似文献
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The northwestern part of Guangxi is a typical karst landform. There are about ten species of the genus Sinocyclocheilus distributed in the region. To investigate the phylogenetic relationships and resolve the taxonomic status of these species,
we determined nucleotide sequences of complete mitochondrial cytochrome b gene of 11 ingroup species and one outgroup species Barbodes laticeps. Phylogenetic trees were reconstructed using maximum parsimony and maximum likelihood analyses. Phylogenetic results showed
that these species cluster as one clade with strong support. The 95% credibility interval (CI) of the divergence time between
the species in the northwest part of Guangxi and other species in the genus Sinocyclocheilus is 8.28–12.40Mya. For the karst environment, these species show marked, recent genetic differentiation. From the overall
consideration of morphology and molecular data Sinocyclocheilus tianeensis should be a valid species. 相似文献