渤海自由生活海洋线虫两个新纪录种

在对渤海滨州贝壳堤岛的自由生活海洋线虫进行分类和多样性研究中,发现2个我国新纪录种并进行了描述。其中,澳洲深咽线虫Bathylaimus australis Cobb,1894主要特征为:头刚毛长约20μm,分为4节,顶端膨大;前口腔大,无齿,后口腔小,具小齿;化感器双环形,位于口腔中部位置;交接刺细长,稍向腹面弯曲,近端膨大呈头状,长32-37μm;引带宽大,肾形,长36-40μm,末端角质化,渐尖。古氏努朵拉线虫Nudora gourbaultae Vincx,1989主要特征为:体表具12列纵向排列的V型装饰;第二体环较宽,头刚毛11-15μm(为头颈的67%-81%);化感器圆形,直径4-6μm(为相应体径的29%-38%),位于第二体环上;具双咽球;交接刺细长,弯曲呈S型,长为肛径的1.3-1.5倍;引带等于或长于交接刺,镰刀型,无肛前辅器。     

东海自由生活线虫两个新纪录种

在对东海的自由生活海洋线虫进行分类和多样性研究中,发现2个我国新纪录种并进行了描述.深海螺旋球咽线虫Spirobolbolaimus bathyalis Soetaert&Vincx,1988的主要鉴别特征为:体表具显著的环纹,头感觉器呈乳突状,化感器螺旋形,口腔中部具有一个背齿以及一对亚腹齿,咽前后各有一个咽球;具有...     

中国南海自由生活海洋线虫Sabatieria Rouville,1903的三个新纪录种

对首次发现于我国南海海域SabatieriaRouville,1903的三个种进行了描述。其中,弯刺萨巴线虫Sabatieria curvispiculata Gagarin.2013主要特征为:头刚毛较短(3μm),角皮具有不规则的侧装饰点,交接刺细长且双弯曲,雄体具有15个小的乳突状肛前辅器。锥尾萨巴线虫Sabatieria conicaudaVitiello,1970主要特征为:具有短的锥状尾,角皮具有侧装饰点,交接刺弯曲,前半部分较宽,中间有角质化的隔膜,后半部较窄且没有隔膜,雄体具有9个小孔状的肛前辅器。迁徙萨巴线虫Sabatieria migrans JensenGerlach 1977主要特征为:头刚毛较长(22μm),交接刺细长且弯曲,近端具有中间隔膜,雄体具有23个小的肛前辅器。     

中国沿海自由生活线虫拟色矛线虫属(Chromadorita Filipjev,1922)两个新纪录种

在对海南岛及渤海滨州贝壳堤岛的自由生活海洋线虫进行分类鉴定和多样性研究中,发现拟色矛线虫属2个新纪录种:微拟色矛线虫(Chromadorita minima (Kreis) Wieser, 1954)和异常拟色矛线虫(Chromadorita abnormis (Kreis) Gerlach, 1965),并进行了描述。其中,微拟色矛线虫(C. minima)具有以下特征:体型粗短,体表具横向均匀排列的斑点、无环纹;口腔具有大的稍弯曲的背齿、头刚毛5—6μm;交接刺均匀、弯曲、近端不膨大、长约为泄殖孔体径的1.5倍、引带突尾状、无肛前辅器。以上特征与原始描述一致,但交接刺稍短(30—35μm vs 41μm)(测量6个个体)。异常拟色矛线虫(C. abnormis)虫体细长,体表具横向均匀分布的环纹和斑点;头刚毛长0.4—0.5倍头径、化感器为横向的肾形、口腔具有一个稍大的背齿和两个较小的亚腹齿;交接刺细长、向腹面弯曲呈弧状、近端头状、远端渐尖、引带板状、无引带突、具5个杯状的肛前辅器。其特征与原始描述相似,特别是德曼值a、b、c一致,但该标本体型较大(818—1231μm vs 81...     

南黄海潮间带海洋线虫多样性及中国海4个新纪录种记述

为了查清南黄海自由生活海洋线虫(Nematoda)种类组成和物种多样性,作者开展了南黄海沿岸潮间带自由生活海洋线虫的分类和多样性研究。通过形态学分类方法鉴定出海洋线虫247种或分类实体,其中最优势属为吞咽线虫属(Daptonema),属内个体占线虫总数的19.6%,次之为近色矛线虫属(Chromadorina)、折咽线虫属(Ptycholaimellus)和棘刺线虫属(Theristus)。最优势种为暹罗海单宫线虫(ThalassomonhysterasiamensisKito&Aryuthaka,1998),数量上占线虫总数的12.6%,其次为拟短毛吞咽线虫(Daptonema parabreviseta Huang&Sun, 2018)和眼点折咽线虫(Ptycholaimellus ocellusHuang&Wang,2011)等。描述并图示了中国4个海洋线虫新纪录种,即居中嘴咽线虫(Enoplolaimusmedius Pavljuk, 1984)、暹罗海单宫线虫(Thalassomonhystera siamensis Kito&Aryuthak...     

厦门岛东南海滩自由生活海洋线虫一新种

本文报道厦门岛东南海滩自由生活海洋线虫单宫线虫目希阿利线虫科新种-厦门吻腔线虫（Rhynchomema xiamenensis sp.nov)。对新种形态特征进行了详细描述并与近似种作了比较。     

广西北海金海湾红树林保护区自由生活海洋线虫联体线虫属（Comesoma）两个新记录种

在2021年春季对广西北海金海湾红树林保护区的自由生活海洋线虫进行分类和多样性研究中发现联体线虫属（Comesoma）国内2个新记录种,分别为百慕大联体线虫（Comesoma bermudense）和赫尔曼联体线虫（Comesoma hermani）,并对其特征进行了描述与图示。百慕大联体线虫主要特征为：4根头刚毛,长度为21~31 μm,4根亚头刚毛,长度为5~7 μm;虫体表皮具横排的侧分化点纹,颈部有不规则排列的颈刚毛;口腔前部膨大,底部角质化;螺旋状化感器,2.5圈;两条细长的交接器,弧长189~200 μm,引带没有突起,肛前附器乳突状;金海湾标本交接器弦长与尾长之比为0.7~0.9,大于其模式种的0.4~0.6。赫尔曼联体线虫主要特征为：口腔前部呈杯状,基部加厚,后部狭窄;螺旋状化感器,2.5圈;两条细长的交接器,弧长187~192 μm,引带没有突起;金海湾标本雄性体长约为2.2~2.4 mm,大于模式种的1.7~2.1 mm。该属物种在红树林湿地为首次报道。     

东海大陆架自由生活海洋线虫一新种:镰刀光皮线虫(线虫:色矛科)

于东海陆架沉积物中发现并描述一自由生活海洋线虫新种：镰刀光皮线虫Actinonema falciforme sp.nov.镰刀光皮线虫的主要鉴定特征为：六根外唇刚毛和四根头刚毛成一圈;表皮具复杂而前后不同的装饰和侧分化;大而明显的化感器椭圆形,中间具一横裂口;单前精巢,反折;前后双卵巢,反折;缺失交接刺和引带,仅具有镰刀形引带侧件。在光皮线虫属中,只有镰刀光皮线虫和长尾光皮线虫A.longicaudatum缺失交接刺和引带,而仅具有引带侧件。镰刀光皮线虫可根据较短的体长、镰刀形引带侧件和较短的尾部而区别于长尾光皮线虫。     

中国福建省红树林湿地中自由生活海洋线虫(联体线虫科)的2个新种

本文描述了中国福建省红树林湿地中自由生活海洋线虫的2个新种。Sabatieria conicoseta sp.nov.的主要特征是：具有短的锥形体刚毛、12-15个管状的肛前附器以及长度为12-15 μm的直的引带突起。Dorylaimopsis papilla sp.nov.的主要特征是：交接器中部具有角质化带状隔膜,近端头状具一小钩,其长度为肛门所在位置体直径的1.5–1.8倍,具有长度为37-40μm的背尾指向的引带突起。泄殖孔前具16-18个微型乳突状的肛前附器。     

东海自由生活线虫两新种

描述了采自东海陆架沉积物中自由生活线虫Hopperia和Nemanema属的两个新种。新种大化感器霍帕线虫主要特征是螺旋形化感器5圈,较大;弓形交接刺近端宽大具有中肋,延伸至三分之一处;引带具有弯曲的引带突;6个乳突状的肛前辅器;锥柱状尾具有膨大的末端和尾端刚毛。新种小线虫的主要特征是身体大小是属内最小的;具有较大的椭圆形化感器;尾锥状;交接刺细,具有腹面翼膜,近端弯钩状;引带环形;1个肛前辅器乳突状,其上着生3条刚毛。更新完善了Hopperia属17个种的二岐检索表。     

One new free-living marine nematode species of genus Cephalanticoma from the South China Sea

One new species of free-living marine nematode Cephalanticoma brevicaudata sp. nov. from the South China Sea is described. Cephalanticoma brevicaudata sp. nov. is characterized by spindle body with relatively short tail; head with cephalic capsule; three teeth at anterior of pharynx; excretory pore opens posterior to cervical setae; three cervical setae per file; spicules arcuate, cephalate and ventrally bent proximally, and blunt distally, 1.8 a.b.d. long, without ventral ala; gubernaculun slender, simple rod, without apophyses; tubular supplement 34 μm long, 2.3 a.b.d. in front of cloaca.     

Protoraphis Simonsen,a newly recorded marine epizoic diatom genus for China

Epizoic diatoms on marine copepods are common in nature and may have a special ecological relationship with their hosts.However,this special ecological group is not well known,and it has only rarely been studied in the China seas.To address this knowledge gap,the species diversity and classification of epizoic diatoms on planktonic copepods were studied with samples collected from the East China Sea.In the present study,a marine araphid diatom genus Protoraphis and its type species,Pr.hustedtiana,were observed and identified by light and electron microscopy,thus representing the first record of this genus and its type species in China.This genus is characterized by a median sternum strongly bent to opposite sides and terminate in two transapical grooves at the valve ends.Protoraphis hustedtiana was found to be epizoic on the posterior body appendages and segments of the marine calanoid copepod Candacia bradyi.An internal view shows a complex,ear-shaped process that is close to the apical slit field.The ecological habitats and geographical distributions of Protoraphis were also discussed,and,together with complementary morphological studies,our results have increased the number of records for marine epizoic diatoms to three genera with three species in China,including Pseudohimantidium and Pseudofalcula.     

Studies on the species composition and biodiversity of free-living marine nematodes in the southern Huanghai Sea

1 IntroductionThe conservation, persistentuse and basic re-search ofbiodiversity are increasingly becom ing oneofthe centraltopics concerned by internationalaca-dem iccirclesandothergroupsdueto itshugevaluetom ankind living and suffered seriousthreats. Fr…     

南海北部自由生活海洋线虫的群落结构和生物多样性

A quantitative study on the community structure and biodiversity of free-living marine nematodes and their relationship with environmental factors in the northern South China Sea were carried out based...     

One new species and two new records of free-living marine nematodes from the Huanghai Sea

1 IntroductionIn January 2003, undisturbed sediments were tak-en from a grid of 22 sampling stations (from 32.5° to37°N, 122° to 125°E) during the cruise of an ecologi-cal survey of the over-winter ground for anchovy inthe Huanghai Sea. Meiofaunal abundance varied from55.3 to 152.0 ind/cm2 [(95.4 ±27.0) ind/cm2], with81% to 93% [(83.1 ±22.7) ind/cm2] of the specimensbeing nematodes. Up to now, twenty-nine species ofmarine nematodes have been recorded from theHuanghai Sea (Zhang and P…