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 109 毫秒
1.
本文报道在青岛沿岸采到的多毛类栉(虫耑)虫。这种动物身体结构简单,生殖方式原始,是研究多毛类起源与系统演化很好的材料。它可自由生活,也可与其它动物共生。我们的标本与前人描述略有不同,简单型刚毛的齿数可达6个。栉(虫耑)虫在中国海是首次记录。  相似文献   

2.
根据在中国近海采集到的标本,描述多毛类环节动物一新种——中华竹节虫(Sabaco sinicus sp.nov.)。该物种标本在乌沙科夫等(1962)报道后一直被错误鉴定为钩齿短脊虫(Asychis gangeticus Fauvel,1932)。我们基于以下性状将该种描述为一新物种:项沟和前三个刚节具深棕色色素点;刚节4–6的腺体分布特征;肛前节无刚毛;肛漏斗喇叭状,背侧小叶呈扁盘状;具膝状的背刚毛、表面有或无螺旋刺毛带的细毛状背刚毛;腹刚毛为排成一列的鸟嘴状齿片刚毛。钩齿短脊虫和该新种的区别在于前者身体无色素点,肛板背侧小叶呈三角形。自1950s以来,该物种的分布区已经从长江口以南海区明显向北扩展。  相似文献   

3.
孙悦  李新正 《海洋与湖沼》2018,49(2):452-456
依据中国科学院海洋生物标本馆馆藏仙虫科标本,对中国海域仙虫属(Amphinome)物种进行了综述,共发现两个仙虫属物种,即仙虫Amphinome rostrata(Pallas,1766)和黑鳃仙虫Amphinome nigrobranchiata Horst,1912,其中,黑鳃仙虫为中国海域首次记录。经过研究,《中国近海多毛环节动物》一书中所描述的华美仙虫Amphinome pulchra Horst,1912应是仙虫的幼年个体。本文对以上两个物种的形态特征和地理分布进行了论述。  相似文献   

4.
报道了寄生于豆娘Abudefdufsp .鳃上的新海盘虫属一新种和寄生于驼背鲈Cromileptesaltivelis鳃上的海盘虫属一新记录。双曲片新海盘虫 ,新种Neohaliotremadi curvilamellatum ,sp .nov .与NeohaliotremabychowskiiZhukov ,1 976相似 ,但支持器的形态结构不同和交接管量度上有差异。驼背鲈海盘虫HaliotremacromileptisYoung ,1 968与原始描述相比 ,除交接管稍长外 ,其它量度与形态基本一致。  相似文献   

5.
报道了寄生于豆娘Abudefdufsp,鳃上的新海盘虫属一新种和寄生于驼背Cromileptesaltivelis鳃上的海盘虫属一新记录,双曲片新海盘虫,新种Neohaliotrema dicurvilamellatum ,sp.nov与Neohaliotrema bychowskiiZhukov 1976相似,但支持器的莆态结构不同和交接管量度上有差异,驼背海盘中Haliotrema cromileptis Yong,1968与原始描述相比,除交接管稍长处,其它量度与形态基本一致。  相似文献   

6.
在整理我国首次南极洲及南大洋考察的多毛类环节动物标本中,我们发现了欧努菲虫科 Onuphidae 两个新种。模式标本采自南大洋站号23。正模标本保存在国家海洋局第一海洋研究所,副模标本保存于国家海洋局第二海洋研究所。新种记述如下。(一)南极金菲虫 Kinbergonuphis antarctica,新种(图版Ⅰ)正模标本号 SOA-SO004,副模标本号 SOA-SO005,水深450m,底质砂质泥。所有标本的体后部均断落。前55个体节长为32mm,宽1.8mm(不包括头部)。头部无眼。触角似球状,头触手5个,其外侧头触手向体后伸可达第2刚节;内侧触手较长,可达第10刚节。中触手比外侧触手稍长,向后伸可达第3刚节,所有头触手基节都  相似文献   

7.
2000年夏季,对在胶南、蓬莱、烟台三个养殖区采集到的发生大面积死亡前后的栉孔扇贝进行组织学研究,发现鳃丝和外套腔内寄生有大量的车轮虫,并伴随有大量的黏液产生。车轮虫和黏液的平均检出率分别为18%和12%。本对此类车轮虫进行形态学、病理学等方面的研究,并指出了其对栉孔扇贝的危害作用。  相似文献   

8.
中国近海多穴苔虫属和格苔虫属新种新纪录   总被引:1,自引:0,他引:1  
刘锡兴 《海洋与湖沼》1982,13(1):97-101
作者在整理中国科学院海洋研究所收藏的苔藓虫标本中,发现无囊亚目片苔虫科(Hincksinidae)多穴苔虫属(Antropora)两个新种和三个新纪录。本文系根据1958—1962年和1975—1976年底栖生物拖网资料(共26号标本)整理写成,报告两个新种和三个中国近海的新纪录。新种的模式标本保存在中国科学院海洋研究所。  相似文献   

9.
基于中国科学院海洋生物标本馆历年收藏的标本对明管虫属开展了分类学研究,共发现两种明管虫:Hyalinoecia tubicola (Müller,1776)(明管虫)和H.papillata Imajima,1999(乳突明管虫)。二者均采集于南海北部海域沙质基底,Hyalinoecia tubicola广泛分布于广东省沿岸海域向南至西沙群岛,H.papillata则首次报道于中国南海,其区别于H.tubicola在于第一疣足具伸长舌状、两侧边缘具有乳突的前刚叶( vs.耳状前刚叶、边缘光滑)。本文详细提供了二者的形态学描述和绘图。  相似文献   

10.
中国近海多毛纲缨鳃虫目(Sabellida)龙介虫科(Serpulidae)和螺旋虫科(Spirorbidae)是污损生物的主要类群之一。根据中国科学院海洋研究所历年调查、全国海洋综合调查和作者近年来补充采集的标本,进行系统整理,已陆续报道龙介虫科近51种。本文是第三篇报道,共鉴定龙介虫科8属12种、螺旋虫科7属12种。其中有10种为我国首次记录(有*者系我国首次记录)。  相似文献   

11.
本文描述了于1959年采自中国黄海和东海锥头虫科刺尖锥虫属一新种——中国刺尖锥虫Leodamas sinensis sp.nov.。本文详细描述了该物种的形态特征及与近似种的区别,并编制了刺尖锥虫属Leodamas Kinberg,1866物种检索表。  相似文献   

12.
13.
作者以山东烟台养马岛采集的未受扰动的样品为研究材料,对中国黄海潮间带自由生活线虫的种类和多样性展开研究,发现两个新纪录种八棘单茎线虫(Monoposthia octalata Galtsova,1976)和瑞氏拟单宫线虫(Paramonohystera riemanni (Platt,1973) Lorenzen,1977)并进行描述。八棘单茎线虫主要特征为体表具有八排侧装饰,化感器呈圆形、较小,口腔具有一个大的背齿,口腔前端具有明显角质化波浪形的结构,无交接刺,引带作镰刀状,尾呈锥状。标本特征与Galtsova描述的模式标本特征基本吻合,只是黄海的标本虫体稍长,化感器略大,引带稍长。瑞氏拟单宫线虫主要特征为虫体较细,头刚毛短,化感器呈圆形位于口腔后部,口腔内不具齿,交接刺稍弯曲,为对应体径的4.1倍,引带简单,尾细长呈纤毛状。标本特征与Platt描述的模式标本特征基本吻合,只是黄海的标本虫体稍长,头刚毛和尾部更长,交接刺略长。  相似文献   

14.
蛟龙号载人潜水器在位于雅普海沟北部6 745 m深处的底栖沉积环境中采集到两只石鳖样本,这是石鳖物种分布于此的新记录。形态学和DNA分子标记均支持两只石鳖为鳞侧石鳖属(Leptochiton)同一物种。该种在形态上与L.vanbelleiL.deforgesi接近;在系统发生方面,与L.vanbelleiL.deforgesiL.boucheti的亲缘关系密切。这是截至目前世界石鳖分布报道的第三深度记录。  相似文献   

15.
16.
Mitochondrial DNA sequences were used to identify an invasive swimming crab found in Waitemata Harbour, New Zealand. A 457 base sequence of the cytochrome oxidase 1 gene was compared in New Zealand specimens and nine species of Charybdis from Australia and Asia. The New Zealand specimens aligned with C. japonica. The diagnostic morphological characters of C. japonica were also checked in 54 specimens of the species collected in Waitemata Harbour, and concur with the mtDNA result. This is the first record of C. japonica establishing populations outside its native range. C. japonica, along with C. hellerii and the Lessepsian migrant C. longicollis, are the only known invasive species of Charybdis. C. japonica and C. hellerii are two of the few Charybdis species that inhabit the intertidal zone, and it is likely that the intertidal characteristics of these species contribute to their success as invasive species.  相似文献   

17.
利用生物压片技术,通过形态学和解剖学方法,对采自我国沿岸海洋的仙菜科红藻(Ceramiaceae,Rhodophyta)进行了分类学研究,发现了我国仙菜科新记录属——盖氏藻属(新拟名)Gayliella T.O.Cho,L.McIvor et S.M.Boo。该属目前在我国共有5个种,即短毛盖氏藻(新拟名)Gayliella pmbriatum (Setchell et N. L. Gardner). T. O. Cho et S. M. Boo、优美盖氏藻(新拟名) Gayliella βaccidum (Kützing) T. O. Cho et L. McIvor、泰式盖氏藻(新拟名) Gayliella taylorii (E. Y. Dawson) T. O.Cho et S. M. Boo、马沙盖氏藻(新拟名) Gayliella mazoyerae T. O. Cho, Fredericq et Hommersand和横轴盖氏藻(新拟名) Gayliella transversalis (Collins et Hervey) T. O. Cho et Fredericq,其中前3个种为由仙菜属Ceramium归并的物种,后2个为我国的新记录种。本文对此2个新记录种进行了详细的形态学描述,并讨论了它们与中国已报道的横列仙菜Ceramium gracillimum间的关系。该研究结果丰富了我国海洋仙菜科的物种多样性。  相似文献   

18.
One hundred and fifty specimens of the elasipod holothurian Penilpidia ludwigi (von Marenzeller, 1893) were collected in sediment traps moored near the seabed in the La Fonera Canyon (Catalan Sea, north-western Mediterranean) and on the adjacent continental slope. These provide the third record of this apparently endemic Mediterranean species and the first record from the western Mediterranean. This was the only holothurian species trapped and the most abundant macroscopic organism found in the traps between 1200 and 1700 m depth over the whole sampling period (March–November 2001). It was particularly abundant in spring during the main flux of organic particles in the canyon. This coupling suggests that Penilpidia may aggregate at the seafloor during these events, making food availability a plausible explanation of the seasonal occurrence. Lateral transport of material re-suspended locally or up-canyon by near bottom currents appear to be the mechanism behind this uncommon occurrence, although in situ observations have recently been made on the swimming capability of this holothurian. The occurrence of benthic organisms in sediment traps set close to the seabed can provide information on bathyal benthic and benthopelagic populations.  相似文献   

19.
魏靖乘  孔令锋 《海洋与湖沼》2023,54(4):1134-1148
由于部分囊舌目物种存在较大程度的种内变异,我国早期基于形态学的囊舌目研究存在种名鉴定错误、同物异名等现象。为解决我国沿海囊舌目物种种名使用混乱的问题,结合比较形态学和分子系统学技术手段,对采自山东青岛、浙江舟山、海南陵水的囊舌目样品进行了外部形态和齿舌扫描电镜的检视,并基于COI基因进行系统发育树和遗传距离分析,对国内记录的深绿海天牛Elysia atroviridis Baba,1955重新进行了分类学描述;发现华丽海天牛Elysia ornata (Swainson,1840)应暂定为三边海天牛Elysia marginata (Pease,1871);指状棍螺Placida dendritica (Alder&Hancock1843)是马场棍螺Placida babai Ev. Marcus,1982的误定。回顾了以上几种囊舌目物种及其相似物种的分类学研究历程,对E. atroviridis、E. marginata和P. babai进行了分子系统学和形态学研究,并为解决这三种囊舌目物种的分类存疑问题提供了新的材料和方法。  相似文献   

20.
Macrourus berglax from the East Greenland Sea was studied for the presence of ascaridoid nematodes in 2001, 2002 and 2003. The fishes were collected between 278 and 413 m water depth using a benthopelagic net. Based on the amplification of the internal transcribed spacer ITS-1, 5.8S, ITS-2 and flanking sequences (=ITS+), three ascaridoid nematode species were identified. The prevalence of infestation during the 3 years ranged from 42.9% to 62.9% and 22.9% to 40.0% for the anisakids Anisakis simplex (s.s.) and Pseudoterranova decipiens (s.s.), respectively, and from 28.6% to 60.0% for the raphidascarid Hysterothylacium aduncum. A total of 18 specimens, two of each species and examination year, revealed no sibling species, suggesting a limited distribution of other ascaridoid siblings into the deep sea. The ITS-1, 5.8S and ITS-2 sequences of A. simplex (s.s.) from the East Greenland Sea did not differ from previously published sequence data (GenBank) from other regions in the Atlantic and Pacific oceans. The sequences of P. decipiens (s.s.) corresponded most closely to those of specimens from Richardson Bay, western Pacific, and differed in four positions (0.5%). They corresponded least to those of specimens from Japan (1.5%). The sequence data for H. aduncum differed in two positions in the ITS-1 (0.2%) and three positions in the ITS-2 (0.3%) from sequences from Japan. A high genetic similarity between the regions can be explained by (a) extensive final host migration in the case of A. simplex (s.s.), (b) an overlapping distribution of final host populations along the continental shelves for P. decipiens (s.s.) and (c) a low host specificity and large population size in the intermediate and final hosts for H. aduncum. The occurrence of the identified species in the macrourid fish underlines the potential of cosmopolitan ascaridoid nematodes to distribute not only horizontally but also vertically in the deep sea.  相似文献   

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