首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 31 毫秒
1.
瘰螈属一新种——龙里瘰螈(有尾目:蝾螈科)   总被引:3,自引:0,他引:3  
在贵州省龙里县水场乡采集到一批瘰螈标本,与瘰螈属已知物种比较后,确定其为一新种,即龙里瘰螈(Paramesotriton longliensis Li,Tian,Gu et Xiong sp.nov)。新种与尾斑瘰螈(Paramesotriton caudopunctatus)相似,但新种由于上鳃骨后端上翘,成体头部后端两侧鳃迹部位各有1个明显突起;体背嵴棱强烈隆起;指、趾两侧无缘膜,指、趾末端有黑色角质鞘;肛后尾的腹鳍褶橘红色,约在1/2处此颜色消失;雄螈尾后段浅紫红色无斑纹。统计并记述了新种的外形、头骨特征、染色体组型、生物学资料。  相似文献   

2.
瘰螈属(有尾目,蝾螈科)一新种   总被引:2,自引:0,他引:2  
基于形态学差异、核POMC和线粒体序列分子数据,把分布于武陵山系的尾斑瘰螈种群定名为1新种,武陵瘰螈Paramesotriton wulingensis,其区别于尾斑瘰螈雷山种群(地模标本)鉴别特征为:1)新种体色较深,呈黑褐色,体背面疣粒较大,背脊隆起较低,尾斑瘰螈雷山地模标本体色较浅,呈棕黄色,体背面疣粒较小,背脊隆起较高;2)新种鼻突中间骨缝较深,尾斑瘰螈雷山地模标本鼻突中间骨缝较浅;3)新种前额骨与鼻骨相连的骨缝线呈波浪型,尾斑瘰螈雷山地模标本前额骨与鼻骨相连的骨缝线左右两侧呈明显“A”型;4)新种额鳞弧鳞骨直立前伸且背面观前粗后细,尾斑瘰螈雷山地模标本额鳞弧鳞骨水平前伸且背面观弧前后粗细一致;5)新种翼骨前枝较长达到上颌骨后缘,尾斑瘰螈雷山地模标翼骨前枝较短不到上颌骨后缘.  相似文献   

3.
正龙里瘰螈Paramesotriton longliensis隶属于两栖纲Amphibia有尾目Caudata蝾螈科Salamandridae瘰螈属Paramesotriton。李松等(2008)根据贵州省龙里县采集到的瘰螈标本,描述并发表了瘰螈属新种——龙里瘰螈,为中国特有种。目前该物种记录分布于贵州、重庆和湖北的喀斯特地区(中国两栖类,2020)。本研究于2019年9月在云南省文山壮族苗族自治州麻栗坡县下金厂乡附近(104°48'38"E,23°8'31"N,海拔1 390 m)采集到瘰螈标本4号,包括2号雄性(SWFU 003653和SWFU 003656)和2号雌性(SWFU 003654和SWFU 003655),所有标本均浸泡在10%甲醛中,保存于西南林业大学。根据形态鉴定为龙里瘰螈,为云南省两栖动物分布新记录。  相似文献   

4.
用解剖学技术研究和比较了富钟瘰螈Paramesotriton fuzhongensis和广西瘰螈Paramesotriton guangxiensis的泄殖系统。结果显示两种瘰螈的泄殖系统基本相同,仅生殖腺在颜色和形状上稍有差异。它们具有后位肾,雄螈肾脏由副睾肾和尾肾组成。但雄螈尾肾发出的多条集尿管并不通往后位肾管而是向后汇合成副尿管通往泄殖腔。后位肾管主要起输精作用,而副尿管则负责输尿。结果揭示雄性泄殖管道有功能分离的趋势,这在两栖类中处于较高进化水平。  相似文献   

5.
解剖研究了织金瘰螈Paramesotriton zhijinensis骨骼系统的形态结构,对各骨块的形状、位置及与邻近骨块的关系进行了描述,为研究瘰螈属的分类、演化及动物实验提供基础资料.  相似文献   

6.
江西地区已有两栖动物计2目8科38种(Zhu,1994),其中有尾类已有记录为3种:大鲵(Andriasdavidianus)、东方蝾螈(Cynops orientalis)和肥螈(Paehytriton brevipes)。最近笔者在江西永新县深远山自然保护区陆生脊椎动物调查中,发现了蝾螈科(Salamandridae)瘰螈属(Paramesotrlton)一种有尾类动物,为江西省分布的新记录。现报道如下,作为该物种地理分布的资料参考。1采集时间和地点中国瘰螈[Paramesotriton chinensis(Gary,1895)]标本由宋玉赞采集于2006年5月17日江西省永新县深远山自然保护区船坪附近小溪,海拔352—576m,地理坐标为26°45.1…  相似文献   

7.
以线粒体DNA D-loop序列为分子标记,研究了采自雷公山和武陵山的尾斑瘰螈(Paramesotriton caudopunclatus)5个种群的遗传多样性.获得42个个体mtDNA D-loop区序列,长度为690 bp,其中有30个变异位点,由此定义了13个单倍型.5个种群中未出现共享单倍型的现象.尾斑瘰螈种群...  相似文献   

8.
富钟瘰螈和广西瘰螈骨骼系统的比较研究   总被引:1,自引:1,他引:0  
采用硬骨-软骨双染色技术,研究我国广西产的富钟瘰螈和广西瘰螈骨骼系统,包括头骨、脊柱和附肢骨骼,并对各骨块的形状、位置以及与邻近骨块的关系都作了详细的描述;同时,比较了富钟瘰螈和广西瘰螈骨骼特征的差异,并将富钟瘰螈、广西瘰螈与有斑肥螈、贵州疣螈和东方蝾螈骨骼系统进行了比较,为揭示瘰螈属种间演化关系和蝾螈科属间演化关系提供一定的依据.  相似文献   

9.
本研究采用组织学方法对尾斑瘰螈(Paramesotriton caudopunctatus)的消化器官进行了显微结构观察。结果表明,尾斑瘰螈食管较短,胃、肠壁组织结构分为黏膜层、黏膜下层、肌层和外膜,小肠前段的黏膜下层缺失。胃黏膜层中有许多胃腺,胃腺细胞胞质含嗜酸性颗粒。小肠前段绒毛细长密集,中段、后段逐渐短小稀疏,在黏膜层的固有膜中没有肠腺分布。肝实质中肝小叶界限不明显,肝小叶内有大量色素颗粒成团分布。  相似文献   

10.
有尾两栖类的繁殖活动常常受到环境因子,特别是如温度、湿度和降雨等气候因子的限制。红瘰疣螈Tylototriton shanjing是适应云南山地环境的典型有尾两栖类动物。本研究期望通过对繁殖期红瘰疣螈活动个体数量的野外调查和气候因子的分析,弄清影响红瘰疣螈繁殖行为活动的关键气候因子。研究结果显示,繁殖期红瘰疣螈活动个体数量与气温呈显著的负相关关系,与空气相对湿度和降雨量呈显著的正相关关系。然而偏相关和多元回归分析则表明,红瘰疣螈繁殖行为活动与相对湿度和降雨量关系更密切。红瘰疣螈总是在降雨后引起空气湿度增加以及气温下降时进行各种繁殖行为活动,降雨是影响红瘰疣螈繁殖行为活动关键的气候因子。红瘰疣螈的繁殖行为活动与降雨节律保持一致是对云南山地环境的重要适应。  相似文献   

11.
12.
13.
14.
15.
Comprises species occurring mostly in subtidal habitats in tropical, subtropical and warm-temperate areas of the world. An analysis of the type species, V. spiralis (Sonder) Lamouroux ex J. Agardh, a species from Australia, establishes basic characters for distinguishing species in the genus. These characters are (1) branching patterns of thalli, (2) flat blades that may be spiralled on their axis, (3) width of the blade, (4) primary or secondary derivation of sterile and fertile branchlets and (5) position of sterile and fertile branchlets on the thalli. Application of the latter two characters provides an important basic method for separation of species into three major groups. Osmundaria , a genus known only in southern Australia, was studied in relation to Vidalia , and its separation from the Vidalia assemblage is not accepted. Species of Vidalia therefore are transferred to the older genus name, Osmundaria. Two new species, Osmundaria papenfussii and Osmundaria oliveae are described from Natal. Confusion in the usage of the epithet, Vidalia fimbriala Brown ex Turner has been clarified, and Vidalia gregaria Falkenberg, described as an epiphyte on Osmundaria pro/ifera Lamouroux, is revealed to be young branches of the host, Osmundaria prolifera.  相似文献   

16.
Fifteen chromosome counts of six Artemisia taxa and one species of each of the genera Brachanthemum, Hippolytia, Kaschgaria, Lepidolopsis and Turaniphytum are reported from Kazakhstan. Three of them are new reports, two are not consistent with previous counts and the remainder are confirmations of very scarce (one to four) earlier records. All the populations studied have the same basic chromosome number, x = 9, with ploidy levels ranging from 2x to 6x. Some correlations between ploidy level, morphological characters and distribution are noted.  相似文献   

17.
Curcumin is the yellow pigment of turmeric that interacts irreversibly forming an adduct with thioredoxin reductase (TrxR), an enzyme responsible for redox control of cell and defence against oxidative stress. Docking at both the active sites of TrxR was performed to compare the potency of three naturally occurring curcuminoids, namely curcumin, demethoxy curcumin and bis-demethoxy curcumin. Results show that active sites of TrxR occur at the junction of E and F chains. Volume and area of both cavities is predicted. It has been concluded by distance mapping of the most active conformations that Se atom of catalytic residue SeCYS498, is at a distance of 3.56 from C13 of demethoxy curcumin at the E chain active site, whereas C13 carbon atom forms adduct with Se atom of SeCys 498. We report that at least one methoxy group in curcuminoids is necessary for interation with catalytic residues of thioredoxin. Pharmacophore of both active sites of the TrxR receptor for curcumin and demethoxy curcumin molecules has been drawn and proposed for design and synthesis of most probable potent antiproliferative synthetic drugs.  相似文献   

18.
正Dear Editor,In December 2019, a novel human coronavirus caused an epidemic of severe pneumonia(Coronavirus Disease 2019,COVID-19) in Wuhan, Hubei, China(Wu et al. 2020; Zhu et al. 2020). So far, this virus has spread to all areas of China and even to other countries. The epidemic has caused 67,102 confirmed infections with 1526 fatal cases  相似文献   

19.
20.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号