西藏地区的(鱼兆)科鱼类

<正> 西藏地区的跳科(Sisoridae)鱼类,过去只记载过一种。从1973年到1976年,中国科学院水生生物研究所参加中国科学院青藏高原综合科学考察队,陆续采集到一些鮡科鱼类的标本,经整理,共7属10种,即:扎那纹胸姚Glyptothorax zanaensis,sp.nov.,墨

武汉东湖周丛原生动物六新种

本文报道武汉东湖周丛原生动物的6种纤毛虫新种:绿累枝虫Epistylis chlorelligerumsp.nov.、斗鞘居虫Vaginicola cupulata sp.nov.、弯鞘居虫Vaginicola curvata sp.nov.、褶鞘居虫Vaginicola plicata sp.nov.、大靴纤虫Cothurnia magna sp.nov.、多纹平鞘虫Platy-cola multistriata sp.nov.。

团头鲂血居吸虫病的病原及其防治的研究——包括一种新的描述

团头鲂血居吸虫病是1965年和1973年先后在湖北省浠水县鱼池发现。1.0—1.5寸大的鱼种往往因患此病而死亡。其病原体是文献中未报导过的两种血居吸虫,并一种命名为鲂血居吸虫新种Sanguinicola megalogramae sp.nov.另一种暂列为血居吸虫未定种Sanguincolasp。 较详细地观察和记述了鲂血居吸虫成虫的形态、生态,以及卵、毛蚴、尾蚴等的形态和发育情况。查清了鲂血居吸虫的中间宿主是一种扁卷螺——白旋螺 Gyraulus albus Muller,还进行了尾蚴对鱼苗的感染试验。

中国平鳍鳅科鱼类系统分类的研究 Ⅰ.平鳍鳅亚科鱼类的分类

根据头部骨骼的比较,进一步证实将平鳍鳅科分为两个亚科是正确的。对分布于中国的平鳍鳅亚科鱼类进行了比较详尽的整理,共记载了7属15种(或亚种),其中有1个新种——云南原爬鳅Balitoropsis yunnanensis,sp.nov.和1个新记录——越南华吸鳅Sinogastromyzontonkinensis Pell.et Chev.。

西藏南部的裸裂尻鱼属(Schizopygopsis)鱼类

<正> 西藏鱼类的系统研究,迄今尚未看到;其南部地区的鱼类研究,过去亦不多见。1961年岳佐和、黄宏金参加了中国科学院西藏综合考察队,主要在藏南地区进行了为时7个月的鱼类及其他水生生物的采集调查。我们除在沿途的麻江(藏北)、昌都(藏东)等个别地点进行采集外,主要的考察地区是江孜、日喀则两个专区的部分水域。本文继“西藏南部的条鳅属鱼类”(1963)、“西藏南部的裸鲤属鱼类”(1964)等文之后,仅就裸裂尻鱼属鱼类共7种描记于下,其中:伍氏裸裂尻鱼(Schizopygopsis wui,sp.nov.)为1新

西藏南部的裸鲤属(Gymnocypris)鱼类

<正> 作者等1961年5—10月在中国科学院综合考察委员会的领导下,在西藏南部地区的江孜、日喀则两专区的部分水域中进行了鱼类采集,并于1962年在北京进行了鱼类的种类鉴定及资料整理。本文仅报告该地区的裸鲤属(Gymnocypris)鱼类,共9种。其中新种和新亚种共5个:高体裸鲤(新种)Gymnocypris molicorporus sp.nov.;秉氏裸鲤(新种)Gymnocypris pingi sp.nov.;驼背裸鲤(新种)Gymnocypris gibberis sp.nov.;朱氏裸鲤(新种

西藏南部的条鳅属(Nemachilus)鱼类

<正> 1961年5至10月,岳佐和及黄宏金参加了中国科学院的西藏综合考察队,在西藏南部地区进行了鱼类学考察。1962年又在北京进行了鱼类种类的鉴定及资料整理工作。本文继《西藏鱼类初篇》(张春霖等,1962)之后,仅报告该地区的条鳅属(Nemachilus)鱼类,共六种,其中腹纹条鳅(N.bellibarus,sp.nov.)为一新种,斯氏条鳅(N.stoliczkae Steind.)为1960年张迺治等同志所采。

Extraordinarily thick-boned fish linked to the aridification of the Qaidam Basin (northern Tibetan Plateau)

Scattered with numerous salt lakes and approximate to 2,700-3,200 m above sea level, the giant Qaidam inland basin on the northern Tibetan Plateau has experienced continuing aridification since the beginning of the Late Cenozoic as a result of the India-Asia plate collision and associated uplift of the Tibetan Plateau. Previous evidence of aridification comes mainly from evaporite deposits and salinity-tolerant invertebrate fossils. Vertebrate fossils were rare until recent discoveries of abundant fish. Here, we report an unusual cyprinid fish, Hsianwenia wui, gen. et sp. nov., from Pliocene lake deposits of the Qaidam Basin, characterized by an extraordinarily thick skeleton that occupied almost the entire body. Such enormous skeletal thickening, apparently leaving little room for muscles, is unknown among extant fish. However, an almost identical condition occurs in the much smaller cyprinodontid Aphanius crassicaudus (Cyprinodonyiformes), collected from evaporites exposed along the northern margins of the Mediterranean Sea during the Messinian desiccation period. H. wui and A. crassicaudus both occur in similar deposits rich in carbonates (CaCO3) and sulfates (CaSO4), indicating that both were adapted to the extreme conditions resulting from the ariclification in the two areas. The overall skeletal thickening was most likely formed through deposition of the oversaturated calcium and was apparently a normal feature of the biology and growth of these fish.

Pseudobagrus brachyrhabdion, a new catfish (Teleostei : Bagridae) from the middle Yangtze River drainage, South China

Pseudobagrus brachyrhabdion sp. nov., from the Yuan Jiang and Xiang Jiang of the middle Yangtze River drainage in Hunan and Guizhou Provinces, South China, is described herein. It is distinguished from all other Pseudobagrus species with a truncate or slightly emarginated caudal fin by an unique combination of the following characters: supraoccipital plate and nuchal plate broadly interspaced and covered with skin; nasal barbels only at most reaching anterior margin of eye; maxillary barbels reaching slightly beyond posterior margin of eye; outer mandibular barbels extending to posterior margin of eye; dorsal fin with a somewhat convex distal margin, origin nearer to pectoral-fin insertion than to pelvic-fin insertion; dorsal-fin spine shorter than pectoral spine, with a somewhat serrated posterior margin; pectoral-fin spine with a smooth anterior margin; anal fin with 20-23 rays, base length 23.8-32.0% of standard length, posterior end of anal-fin base anterior to posterior end of adipose fin base; no longitudinal black band extending along flank; eyes large, diameter 16.3-23.7% of head length; and number of vertebrae 5 + 43-46.

A taxonomic study of Oconnorella (Enchytraeidae, Oligochaeta) from Changbaishan Mountain, China

We describe three enchytraeid species, including two new species, from Mt. Changbaishan, Jilin Province, northeastern China. Oconnorella cheni sp. nov. is characterized by a simple spermatheca; absence of the oesophageal appendages and seminal vesicle; and nephridia from 6/7, with a distinct funnel and the efferent duct arising from the anterior part of the postseptale. Oconnorella globula sp. nov. is distinguished by a spermatheca with two diverticula; lack of oesophageal appendages and seminal vesicle; and nephridia from 6/7, with distinct funnel and the efferent duct arising from the mid-ventral or posteroventral part of the postseptale. We redescribe Oconnorella changbaishanensis (Xie et al., 2000) from type and live specimens, and amend some characters that cannot be investigated clearly from mounted specimens. We revise the generic diagnosis of Oconnorella.

Acrossocheilus spinifer, a new species of barred cyprinid fish from south China (Pisces : Teleostei)

Acrossocheilus spinifer sp. nov. is described from the river basins in Fujian Province and the Han Jiang basin in Guangdong Province, south China. It is one of the barred Acrossocheihis species sharing five or six vertical bars on the flanks, with each bar being two scales in width. Acrossocheilus spinifer sp. nov. is morphologically most similar to Acrossocheilus wenchowensis. but distinguished from it by: a colour pattern of all vertical bars extending ventrally to the second scale row below the lateral line, and having the second bar placed posterior to the base of the last simple dorsal-fin ray, a blunt snout; and a stout, last simple dorsal-fin ray. Acrossocheilus spinifer sp. nov. resembles Acrossocheilus kreyenbergii and Acrossocheilus stenotaeniatus with which it shares a stout, last simple dorsal-fin ray with a serrated posterior edge, but is separated from both species by having a narrow median interruption in the lower lip, a lower jaw fully covered by the lower lip when viewed ventrally and the second vertical bar placed posterior to the base of the last simple dorsal-fin ray. The absence of a longitudinal stripe extending along the lateral line on the flanks in males readily distinguishes A. spinifer sp. nov. from Four other species, namely Acrossocheilus fasciatus, Acrossocheilus paradoxus, Acrossocheilus parallens, and Acrossocheilus jishouensis. (c) 2006 The Authors Journal compilation (c) 2006 The Fisheries Society of the British Isles.

Synopsis of the species of Myxobolus Butschli, 1882 (Myxozoa : Myxosporea : Myxobolidae)

A synopsis of 744 nominal species of Myxobolus Butschli, 1882 (Myxozoa, Myxosporea, Myxobolidae) is presented. For each species, the relevant morphometric and morphological data are indicated, as well as the host(s), site(s) of infection within the host and type-locality.

Qianlabeo striatus, a new genus and species of Labeoninae from Guizhou Province, China (Teleostei : Cyprinidae)

Qianlabeo striatus gen. et sp. nov. is described from a stream tributary to the Beipan Jiang of the upper Zhu Jiang (Pearl River) drainage in Matou, Anshun County, Guizhou Province, China. This monotypic genus is mainly characterized by its oromadibular morphology, namely an upper lip only present in and fully adnate to the side of the upper jaw, not covered by the pendulous rostral fold; the median portion of the upper jaw lacking an upper lip but bearing a thin, flexible and cornified cutting edge that is fully covered by the pendulous rostral fold; a postlabial groove prolonged, extended anteromedially close to the anteromost point of the midline of the lower lip but not to meet with its counterpart. The type species of this genus, Q. striatus has a longitudinal dark stripe along the side of the body.

A new genus and species of freshwater monostiliferous hoplonemertean (Nemertea, Enopla) from the People's Republic of China

A new genus and species of freshwater monostiliferous hoplonemertean, Limnemertes poyangensis gen. et sp. nov., from Poyang Lake, People's Republic of China, is described and illustrated. The taxon is compared and contrasted with previously described freshwater hoplonemerteans. This is the fourth species of freshwater nemertean to be described from China and the first recorded from Poyang Lake.

Taxonomic revision of water-bloom-forming species of oscillatorioid cyanobacteria

A polyphasic approach was used to clarify the taxonomy of the water-bloom-forming oscillatorioid cyanobacteria. Seventy-five strains of oscillatorioid cyanobacteria were characterized by 16S rDNA sequence analysis, DNA base composition, DNA-DNA hybridization, fatty acid composition, phycobilin pigment composition, complementary chromatic adaptation, morphological characters, growth temperature and salinity tolerance. Phylogenetic analysis based on 165 rDNA sequences divided the strains into six groups, all of which were clearly separated from the type species of the genus Oscillatoria, Oscillatoria princeps Gomont NIVA CYA 150. Therefore, these strains should be classified into genera other than Oscillatoria. Groups I-III were closely related to one another and groups IV-VI were distinct from one another and from groups I to III. Group I was further divided into two subgroups, group I-pc, which includes strains containing only phycocyanin (PC), and group I-pe, which includes strains containing large amounts of phycoerythrin (PE) in addition to PC. This phenotypic distinction was supported by DNA-DNA hybridization studies. Based on the properties examined herein and data from traditional, botanical taxonomic studies, the groups and subgroups were classified into single species and we propose either emended or new taxonomic descriptions for Planktothrix agardhii (type strain NIES 204(T)), Planktothrix rubescens (type strain CCAP 1459/22(T)) Planktothrix pseudagardhii sp. nov. (type strain T1-8-4(T)), Planktothrix mougeotii (type strain TR1-5(T)), Planktothricoides raciborskii gen. nov., comb. nov. (type strain NIES 207(T)), Tychonema bourrellyi (type strain CCAP 1459/11B(T)) and Limnothrix redekei (type strain NIVA CYA 277/1(T)).