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1.
倒刺Ba(Spinibarbus)于类分布于我国秦岭以南和元江以东诸水系及台湾海南岛。其属级和种级分类,历来意见不一。对采自6个省区的104尾标标本进行形态性状测量和对骨骼标本进行观察的结果表明,倒刺Ba属鱼类以其最未一枚前躯椎上方无上髓棘、第4椎骨的髓棘发达,背鳍前方具一臣伏于皮下的倒刺等特征与Ba亚科(Barbinae)其余属种明显相区别,进一步肯定了把它们作为Ba亚科的一个属是合适的。该属鱼  相似文献   

2.
墨头鱼属(Garra)是一群栖息于山区急流中的鱼类,以其口吸盘吸附于岩石表面,抗衡流水的冲击。本属鱼类的分布较广,扩及非洲东北部和亚洲的南部,如印度、缅甸、泰国、越南等国以及斯里兰卡和加里曼丹诸岛都有分布。我国南方为该属分布区的最北部分,北起长江(包括金沙江)水系,南至珠江水系和海南岛,西及元江、澜沧江、怒江。以云南的种类为最多。本属的亚科隶属有争议,传统放入鲃亚科(伍献文等,1977),近年有人(郑慈荚等,1983;陈湘粦等:1984)放入野鲮亚科,此处不作讨论。在国际范围内研究本  相似文献   

3.
基于物理模型实验的光倒刺鲃生态行为学研究   总被引:2,自引:0,他引:2  
李卫明  陈求稳  黄应平 《生态学报》2011,31(5):1404-1411
建立了基于天然河道的物理模型,通过控制实验研究水环境因子对鱼类行为的影响。文中选取了金沙江下游2.6 km河段建立物理模型,以南方水系的经济鱼类光倒刺鲃为研究对象,进行了鱼的行为对底质和流速的响应实验。分析得出,光倒刺鲃对砂卵石底质的选择明显大于其它底质且差异极其显著(P<0.01),光倒刺鲃2龄幼鱼期的喜好流速范围为0.3-0.6 m/s;研究同时发现水流紊动强度对光倒刺鲃行为具有重要影响。该研究结果可以为光倒刺鲃栖息地模型提供参考。  相似文献   

4.
刺鲃、倒刺鲃、中华倒刺鲃和须鲫的染色体二倍数均为100,NF=150。前3种鱼的核型都是18m+32sm+26st+24t。须鲫的核型为18m+32sm+18st+32t。四种鱼染色体的体积从大到小均呈缓慢的连续递变,都是sm_1较大。作者认为这14种鱼与鲤属和鲫属鱼类一样,属于二倍化了的四倍体种娄;并认为鲃亚科和鲤亚科中现存的四倍体种类可能都是由一共同祖先经多倍化后自然选择演变而来的;考虑到四倍体物种具有较大的可塑性和较强的适应力,提出了开发和利用(资源增殖、驯化和杂交等)这些鱼类的设想。  相似文献   

5.
中国广西金线鲃属盲鱼一新种及其生境(鲤科,鲃亚科)   总被引:2,自引:1,他引:1  
2002年8月28日在广西田林县平山乡一洞穴地下河中采到1尾鱼类标本,经鉴定为鲤科鲃亚科金线鲃属鱼类1新种,定名为田林金线鲃Sinocyclocheilus tianlinensis sp.nov.。鉴别特征:眼退化;吻突出,呈鸭嘴状;头后部急剧隆起,形成一向前不分叉的额骨;新鲜标本体半透明。新种与白斑金线鲃S.albeoguttatus、鸭嘴金线鳃S.anatirostris、无眼金线鲃S.anophthalmus和透明金线鲃S.hyalinus较相近,而与其他已知种不同。模式标本保存中国科学院动物研究所。  相似文献   

6.
本文记述寄生于鮈亚科Gobioninae和鲃亚科Barbinae鱼类单殖吸虫六新种:寄生于鮈类的二种,寄生于鲃类的四种,隶属于指环虫科Dactylogyridae的二个属。模式标本保存于华南师范学院生物系。文中量度均以毫米为单位。  相似文献   

7.
整理新疆地区蝇科标本中,发现二新属和二新种,其中花秽蝇属,新属Anthocoensia gen.nov.隶于秽蝇亚科Coensoiinae,叉棘蝇属,新属Crusiaella gen.nov.隶于棘蝇亚科Phaoniinae。新种模式标本保存于沈阳师范学院生物系。  相似文献   

8.
本文对广东滩涂经济鱼类寄生吸虫异肉科Allocreadiidae(Loose,1902)(Stossich,1903)和独睾科MonorchiidaeOdhner,(1911)进行研究,并建立拟履口吸虫属Paracrepidostomumgen.nov.是异肉科,履口亚科Crepidostominae(Dollfus,1951)的新属;长宫吸虫属Lenolopagen.nov是独睾科、孤睾亚科Lasiotocinae的新属。文中对二新属二新种:金钱鱼拟履口吸虫Paracrepidostomumscatophagusi和惠州长空吸虫Lenolopahuizhouensis分别进行了详细的描述,并对异肉科、履口亚科和属的分类特征进行修正、补充和讨论。  相似文献   

9.
吴兴亮 《菌物系统》1998,17(3):206-208
本文报道了采自海南岛南部地区笼头菌属(ChlthrusMich:Pers)一个新种,即:海南笼头菌ClathrushainanensisX.L.Wusp.nov.文中对新种的形态特征作了拉丁文和汉文的描述,附有新种担子果和孢子(扫描电镜)照片,并讨论了新种与本属其他种的区别,主模式标本保存于贵州学院真菌标本室(HGAS),副模式标本保存于中国科学院昆明植物研究所隐花植物标本馆(HKAS)。  相似文献   

10.
记述了首次发现于柴达木盆地早渐新世晚期至晚渐新世早期(距今27~29 Ma)的鲤科鱼类化石。材料包括咽骨、咽齿、匙骨、腹鳍骨及一些零散的鳍条。咽骨及咽齿化石与原始鲃亚科鱼类及裂腹鱼亚科裂腹鱼属鱼类的相似;腹鳍骨化石与原始鲃亚科鱼类的更相似。鲃亚科鱼类现今分布于北纬35°以南的亚洲、欧洲南部及非洲北部;裂腹鱼属鱼类分布局限于青藏高原东、南、西面的边缘区域,在柴达木盆地没有分布。柴达木盆地水系现生鱼类仅见适于高寒环境的高度特化等级的裂腹鱼亚科鱼类及鳅科高原鳅属鱼类,鱼类组成与早渐新世晚期至晚渐新世早期的不尽相同。  相似文献   

11.
Pethia sanjaymoluri, a new cyprinid, is described from the Pavana and Nira tributaries of Bhima River, Krishna drainage, Maharashtra, India. It can be distinguished from congeners by a combination of characteristics that includes an incomplete lateral line, absence of barbels, upper lip thick and fleshy, 23–25 lateral series scales, 7–12 lateral‐line pored scales, 10 predorsal scales, 11–14 prepelvic scales, 17–20 pre‐anal scales, 4½ scales between dorsal‐fin origin and lateral line, four scales between lateral line and pelvic‐fin origin, 8–15 pairs of serrae on distal half of dorsal‐fin spine, 12–14 branched pectoral‐fin rays, 4 + 26 total vertebrae, 4 + 5 predorsal vertebrae, 4 + 13 abdominal vertebrae, 13 caudal vertebrae and a unique colour pattern comprising a humeral spot positioned below the lateral line and encompassing the third and fourth lateral‐line scales and one scale below, one caudal spot on 17th–21st lateral‐line scales with a yellow hue on its anterior side and apical half of dorsal fin studded with melanophores making the fin tip appear black. Genetic analysis based on the mitochondrial cytochrome b gene sequence suggests that the species is distinct from other known species of Pethia for which data are available.  相似文献   

12.
本文对光倒刺鲃,中华倒刺鲃和倒刺鲃18种氨基酸和8种微量元素进行了分析,结果表明:这三种鱼是营养价值很高、滋味很鲜美的鱼类。并且,根据结果氨基酸组成比例,可为该鱼的人工饲养等方面的研究提供理论依据。  相似文献   

13.
Four lizardfishes of Saurida (family Synodontidae), S. undosquamis, S. umeyoshii sp. nov., S. macrolepis, and S. longimanus, are described. All are recognized here as the Saurida undosquamis group, characterized by having dark dots on the upper margin of the caudal fin, pectoral fin exceeding origin to pelvic fin, anterior rays of dorsal fin neither elongate nor filamentous, predorsal length greater than distance between dorsal-fin and adipose-fin origins, 46–55 pored lateral-line scales, and vomer with 0–8 teeth. Saurida undosquamis, from northern West India and West Pacific, excluding East Asia, differs from others in having lateral-line scales ridged on the caudal peduncle, conspicuously concave posterior margin of the pectoral fin, 51–55 pored lateral-line scales, and 50–53 vertebrae. Saurida umeyoshii sp. nov., from southern Japan and the East China Sea, is defined by three rows of indistinct dark blotches on, above, and below the lateral line, distribution of scale pockets with melanophores on their posterior part extending over the entire abdominal region from the lateral line in specimens over ca. 130 mm SL, lateral-line scales not ridged on caudal peduncle, 49–52 pored lateral-line scales, and 48–50 vertebrae. Saurida macrolepis, from the Indo-West Pacific, is characterized by 46–49 pored lateral-line scales and 45–48 vertebrae. Saurida longimanus, from northern West India, northwest Australia, and southern Indonesia, differs from the others in having a long pectoral fin extending past the origin of the dorsal fin. Some geographic variations are found in S. macrolepis. Saurida grandisquamis is confirmed as a junior synonym of S. undosquamis, based on examination of the type specimens. A key to species in the S. undosquamis group is included.  相似文献   

14.
在整理华缨鱼属标本时发现,1993年9月在广西壮族自治区天峨县红水河水系地下河采集到的一批标本为一个未经发表的新种,新种订名为大眼华缨鱼(Sinocrossocheilus megalophthalmus)。其下咽齿2行,可与下咽齿3行的7种华缨鱼相区别,而与属内同样具2行下咽齿的贵州华缨鱼(S.guizhouensis)、小口华缨鱼(S.microstomatus)和宽唇华缨鱼(S.labiatus)亲缘关系较近。但:(1)新种胸鳍中点上方无黑斑,背鳍分枝鳍条7,腹鳍分枝鳍条7,背鳍前鳞15—16,眼大,头长为眼径2·5—3·1倍,眼径为头宽44·7%—57·8%,吻须后伸至前后鼻孔之间或眼前缘,口角须后伸至眼前缘至眼中之间或眼中至眼后缘之间,体长为尾柄高8·9—10·7倍,头长为吻长2·5—3·7倍,可与贵州华缨鱼(胸鳍中点上方有一明显黑斑,背鳍分枝鳍条8,腹鳍分枝鳍条8,背鳍前鳞12—14,头长为眼径4·0—5·0倍,眼径为头宽16·6%—20·7%,吻须后伸不达后鼻孔后缘,口角须后伸至眼前缘,体长为尾柄高7·2—8·2倍,头长为吻长1·9—2·2倍)相区别;(2)新种背鳍前鳞15—16,侧线鳞39—40,侧线上鳞4·5—5·5,背鳍分枝鳍条7,鳃耙13,腹鳍末端伸达肛门,眼径为头宽44·7%—57·8%,可与宽唇华缨鱼(背鳍前鳞22,侧线鳞42—45,侧线上鳞6·5,背鳍分枝鳍条8,鳃耙10,腹鳍末端不达肛门,眼径为头宽23·3%—30·0%)相区别;(3)新种与同水系的小口华缨鱼在鳍条数、侧线鳞、体色、斑纹等方面最为相似,但新种围尾柄鳞14/16,眼大,头长为眼径2·5—3·1倍,腹鳍末端伸达肛门,口角须后伸至眼前缘至眼中之间或眼中至眼后缘之间,吻皮边缘深裂成小穗,背鳍起点距吻端较距尾鳍基为近,背鳍长大于头长,体长为尾柄长4·8—5·9倍,头长为吻长2·5—3·7倍,尾柄长为尾柄高1·6—2·1倍,可与之(围尾柄鳞12,眼小,头为眼径4·4—4·6倍,腹鳍末端不达肛门,口角须伸达眼下方,吻皮边缘不开裂或开裂不明显,背鳍起点距吻端等于距尾鳍基,背鳍条约等于头长,体长为尾柄长6·1—6·4倍,头长为吻长2·1—2·4倍,尾柄长为尾柄高1·4—1·5倍)相区别。  相似文献   

15.
Sinocyclocheilus donglanensis, a new cyprinid species from a subterranean river in Donglan County in the Guangxi Zhuang Autonomous Region of southern China, is described. It is distinguished from all congeners by the following combination of characteristics: a completely scaled body with well-developed eyes; a curved lateral line possessing 57–64 scales; pectoral fin not reaching pelvic fin origin and last unbranched ray of the dorsal fin clearly serrated along its posterior edge; 8–9 predorsal vertebrae; 8–9 gill rakers; joints of dentary-angulars not close to each other at the isthmus; and a slightly inferior mouth with the upper jaw (6.2–7.4% in standard length: SL) protruding slightly beyond the lower one (5.7–6.7% SL). Sinocyclocheilus donglanensis is sympatric with the peculiarly shaped, hunchbacked S. altishoulderus.  相似文献   

16.
《动物学研究》2017,(5):291-299
A new species of the sisorid catfish genus Exostoma Blyth,1860 was collected from two hill-stream tributaries of the Nujiang (Salween River) drainage in Gaoligong Mountain,south-western Yunnan Province,China from 2003 to 2006 and from two tributaries of the Salween River in Cangyuan County,Lingcang Prefecture,Yunnan Province,China (in 2007) and in Yongde County,Lingcang Prefecture,Yunnan Province,China (in 2015).Exostoma gaoligongense sp.nov.is the 10th species of the genus and is most similar to E.vinciguerrae in morphology but can be distinguished by pelvic fin reaching anus vs.not reaching;maxillary barbels just reaching or slightly surpassing pectoral-fin origin vs.surpassing pectoral-fin origin or even reaching posterior end of gill membrane;abdominal vertebrae 23-25 vs.25-27;length of dorsal fin/dorsal to adipose distance 90.3%-287.0% vs.59.2-85.7.A key to Exostoma spp.is provided.  相似文献   

17.
A new balitord fish, Hemimyzon sheni n. sp. was collected from the Tar-Ju River basin, Taitung County, southeast Taiwan. The new endemic species can be distinguished from other congeneric species by a combination of the following features: (1) dorsal fin rays 3 + 8, pectoral fin rays 13+11 (total 24); (2) lateral-line scales 78–80 and predorsal scales 31–32; (3) somewhat pointed head shape; (3) small pelvic fin which does not extend to rear vertical of dorsal fin; (4) position of anus close to anal fin base; and (5) predorsal region with many very small light brown marks and unmarked pectoral fin. A diagnostic key to three nominal, endemic species of Hemimyzon from Taiwan is also provided in this paper.  相似文献   

18.
高原特有条鳅鱼类两新种在广西的发现及其动物地理学意义   总被引:16,自引:4,他引:12  
描述了采自广西都安县红水河水系的条鳅亚科鱼类2个新种:丽纹云南鳅yhnnanilus pulcherrimussp.nov.在侧线长度、鳞片分布、鳍条数目、尾型、吻须长度等方面与侧纹云南鳅yunnanilus pleurotaenia(Regan,1904)最为相似,但新种独特的斑纹和上下唇的长乳突可明显与之区别,二者在一些度量特征上也有区别。黄体高原鳅Triplophysa flavicorpus sp.nov.与同分布于西江水系的南丹高原鳅T.nandanensis Lan et al.较为相似,并以下列特征组合与高原鳅属所有已知种相区别:背鳍分枝鳍条10根、臀鳍分枝鳍条6~7根、体被细鳞、侧线完全、具6条宽横斑和1条沿侧线的细纵纹、尾鳍深分又、尾鳍基具1半圆形黑斑、尾鳍上下叶各具2条黑色横斑、腹鳍末端后伸超过肛门、腋部具发达的肉质鳍瓣、上唇中央完全中断等。云南鳅属和高原鳅属均是高原特有类群,前者仅分布于云南东中部地区,后者则集中分布于青藏高原。两个新种的分布地均远离这两个属的分布中心,而且呈间断分布。通过各自相近种谱系关系分析,推测这种特殊的分布格局是通过隔域分化形成的。  相似文献   

19.
刺鲃基于线粒体细胞色素b基因的生物地理学过程   总被引:18,自引:4,他引:18  
以中华倒刺鲃Spinibarbus sinensis为外类群,研究了不同地理种群刺鲃Spinibarbus calduelli细胞色素b基因序列(1140bp)变异,以探讨其生物地理学过程。结果表明:长江下游水系与珠江水系种群的变异值为1.2%—2.3%,与闽江水系的为2.7%—3.7%,与九龙江水系的为3.1%—4.2%,这些值都远远低于它们与中华倒刺鲃的变异值(13.2%—14.6%)。遗传变异值表明了刺鲃的生物地理学过程,首先是东南沿海的水系同内地的水系发生隔离,然后珠江水系同长江水系隔离,这些变化均发生在第四纪。  相似文献   

20.
从线粒体细胞色素b探讨长臀鲃属三个种分类与进化的关系   总被引:11,自引:1,他引:10  
本研究测定了长臀属(MystacoleucusG櫣nther)中的3个种 :月斑长臀(M.chilopterusFowler)、长臀[M.marginatus(CuvieretValenciennes)]和细尾长臀(M.lepturusHuang)共22个个体的线粒体细胞色素b部分基因片段 ,其序列为408bp,并选用亚科(Acheilognathinae)中华(RhodeussinensisG櫣nther)及亚科(Barbinae)中的云南倒刺(Spinibarbus.denticulatusyunnanensisTsu)作为外群。结果表明 :细尾长臀与月斑长臀、长臀间存在遗传分化 ,分化程度与鲤科其它鱼类相似 ;而月斑长臀和长臀却无法分开。结果提示 ,月斑长臀和长臀很可能为同一个种。此外 ,长臀属与云南倒刺的亲缘关系较近 ,表明有争议的长臀属归入亚科是合理的。  相似文献   

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