厦门岛附近自由生活海洋线虫的研究—联体线虫科的变异毛咽线虫和异毛联体线虫新种

本文地发现于厦门大学海滩潮间带泥基质区两种联体线虫科（Comesomatidae Filipjev,1918)的虫种进行了描述，异毛联体线虫新种（Paracomesoma xiamenense sp.nov.)由于其第二圈感觉毛的长度相同，并且比第三圈头感觉毛短；交合刺两根不等长并有两列、每列28－30个肛前乳突以及肛后的柄状乳突等特征使得该种成为一个新种。变异毛咽线虫（Dorylaimopsis variabilis Vincx,1997)的侧边分化的纵列刻痕；弓形的交合剂、突出的背尾侧骨突和14个肛前乳突等特征同Vincx(1997)的描述相近，但某些测量的数值有差别。本文并给出了异毛联体线虫属新的双歧式检索表。     

渤海中部海线虫属(线虫纲:嘴刺线虫目,烙线虫科)一新种(英文)

记述了渤海中部在站位DA18、水深27m采到的海洋线虫一新种,渤海海线虫Thalassironus bohaiensis sp nov该新种的个体大小和De Man比值(a.b.c)与Thalassiro-nus bipartitus(Wieser,1953)十分相似,但雄性副交接刺的结构,两种有显著的差异。新种的副交接刺末端钝且内凹,在腹侧近末端有一明显的小突起,而相近种的副交接刺末端尖锐,没有任何突起。此外,新种雄性交接刺长度也与相近种有明显的差别(62—67μmvs 52μm)列表比较了新种与相近种以及该属目前已报导的其他三个种的详细形态学特征。模式标本保存在青岛海洋大学海洋生物系。     

联体线虫科(线虫动物门)系统分类研究进展

联体线虫科是自由生活海洋线虫中种类多样性较高的一个科,广泛分布于潮间带、浅海甚至超过6 000 m的深渊海底。联体线虫科目前已记录有19个属239个有效种(另有4个属由于原始描述较简单,被认为是疑似属),是当前海洋线虫分类学研究最为活跃的一个科。本文简述了联体线虫科的系统分类研究历史,回顾了这一类群的国内外系统分类学研究进展,对3个亚科的分类进一步做了梳理,并列出了各个属的种类检索表。     

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。     

中国渤海的微口线虫属(线虫动物门)一新种

描述了中国渤海自由生活海洋线虫一新种,奥氏微口线虫Tershellingia austenae sp.nov ,奥氏微口线虫与同属相近种马尔代夫微口线虫的区别特征是:体长(前者为770～950μm,后者为2370μm)、亚头刚毛的位置(前者位于化感器的两边,后者位于化感器之后)及长度(前者明显长于后者),化感器宽度与相应体直径的比例在新种中也更大一些(50～60 vs 45).提供了一个表格式检索表,以助鉴定和比较该属缺乏明显界定食道后球的一个种组.模式标本存放于英国伦敦自然历史博物馆.     

中国厦门湾红树林湿地自由生活海洋线虫两个似三核线虫属(线虫动物门:嘴刺目:似三孔线虫科)新种

似三核线虫属的两个新种似三核线虫红树林种（Tripyloides mangrovensis n.sp.）和似三核线虫厦门种（Tripyloides amoyanus n.sp.）在本文中分别被描述,标本分别采自中国厦门同安湾红树林和海门岛红树林。两个新种都具有6根较粗的外唇刚毛,雄性标本不具有肛前附器,尾部圆锥圆柱形且不具有末端突起。似三核线虫红树林种（Tripyloides mangrovensis n.sp.）口器分成两部分,化感器圆形,尾部具有显著的近端圆锥形和远端纤细的圆柱形,圆柱形部分占尾部的2/3。似三核线虫厦门种（Tripyloides amoyanus n.sp.）口器分成3部分,具有小齿,化感器小,双环状,尾部1/3部分为圆柱形,引带有4个小齿。     

中国近海玉蟹科两新种

本文报道采自我国近海的玉蟹科Leucosiidae 两新种：尖齿拳蟹(新种) Philyra acutidens sp.nov. 及假珍珠玉蟹(新种) Leucosia pseudomargaritata sp. nov.。新种的模式标本保存于中国科学院海洋研究所(青岛)。拳蟹属Philyra及玉蟹属Leucosia系玉蟹科中种类较多的两个属，我们收藏上述两新种的标本数量较多，前一新种产于渤海、黄海及东海北部，后一新种产于南海，尤以北部湾数量较多；它们与亲缘种十分相似，甚至容易造成误定。本文除详细描述新种特征外，还与近似种作了详细比较。     

南沙群岛多齿鳞虫科一新属、两新种

于1987年4—5月在南沙群岛进行综合考察,采集环节动物多毛类样品,经鉴定表明,系多齿鳞虫科1新属,定为新多齿鳞虫属Neopolyodontes,模式种为秀丽新多齿鳞虫Neopolyodontes lepidus gen.sp.nov.,以及新斑鳞虫属Neopanthalis的1新种,命为刺须新斑鳞虫Neopanthalis muricatus sp.nov.。     

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。     

胶州湾自由生活线虫Wieseria属的两个新种

文章描述了采自青岛胶州湾潮下带沉积物中自由生活线虫Wieseria属的两个新种。新种Wieseria sinica sp.nov.特征为具有短的唇刚毛和头刚毛,且指向后方;具有椭圆形双边化感器;弓形的交接刺具有翼膜;环状的引带以及棒状尾。新种Wieseria tenuisa sp.nov.特征为具有大的德曼值（133.6）;长的唇刚毛指向前方;交接刺具有翼膜,近端呈钩状;引带呈棒状;具有相当长的棒状尾（长度相当于7.9倍泄殖腔相应体径）。它区别于新种Wieseria sinica sp.nov.主要在于更长的唇刚毛,且指向前方;交接刺相对较直且具有钩状近端,身体更加细小（德曼“a”值较大）。文章更新完善了的Wieseria属的二岐检索表。     

Re-evaluation of Morphological Diagnostic Characteristics of <Emphasis Type="Italic">Hexapleomera</Emphasis> Dudich, 1931 (Crustacea: Tanaidacea), with Description of a New Species

An undescribed species of Tanaidacea was collected from Yokji Harbor in the southern coast of Korea. Hexapleomera yokjidona n. sp. can be distinguished from other species of the genus by the distinguishing features of a uropod with five articles, a pleopod basal article lacking inner seta, a mandible setal row with two setae, maxilliped coxa with two proximal setae, pereonites 1–3 together longer than wide, and pereopods 2–3 propodus with three ventral setae. To prove that H. yokjidona is a new species, detailed morphological characteristics of both genders are described and a comprehensive comparison among the species of the genus is tabulated. Additionally, diagnostic characteristics previously used to identify the species of Hexapleomera are reassessed and upgraded.     

Paramonohystera weihaiensis sp.nov.(Xyalidae,Nematoda) from the intertidal beach of the Yellow Sea,China

A new species of free-living marine nematode of the genus Paramonohystera was described from the intertidal beach, Weihai. Paramonohystera weihaiensis sp. nov. is characterized by cervical region with a circle of long setae;tail sexual dimorphism, male tail angled dorsally with sharp narrowed of the body at the cloaca, female tail ordinary conico-cylindrical;spicules slender, 2.5 abd long;gubernaculum plate, enlarged distal end with two teeth, without apophysis;precloacal supplements absent;Four caudal gland cells obviously extended to tail. The new species differs from the other fourteen known valid congeners by the combination of its characteristics:a circle of long cervical setae, tail sexual dimorphism, spicules slender, 2.5 abd long, gubernaculum plate with a distal pair of teeth.     

蜾蠃蜚科(甲壳动物:端足目)一新属、新种

作者在鉴定1994年采自大连(北黄海)浅水和广东大亚湾的端足类(Amphipoda)标本中,发现了蜾蠃蜚科(Family Corophiidae)的一新属,即拟亮钩虾属 Genus Paraphotis，报告如下。新属、新种的模式标本保存在中国科学院海洋研究所。     

One new species of free-living marine nematodes (Enoplida,Anticomidae, Cephalanticoma) from the Huanghai Sea

One new species of free-living marine nematodes Cephalanticoma filicaudata sp. nov. from the Huanghai Sea, China is described and illustrated. Cephalanticoma filicaudata sp. nov. is characterized by well developed cephalic capsule, three teeth at the anterior of oesophagus, excretory pore opens posterior to cervical setae, only two cervical setae per file, body length longer than 5 200 μm, tail long and no ventral-lateral seta between the supplement and the cloacal opening. Types are deposited in the College of Marine Life Sciences, Ocean University of China.     

A new species of Cymbasoma Thompson, 1888(Copepoda: Monstrilloida) from the Fujian coast,China

A new monstrilloid copepod species, Cymbasoma cheni sp. nov., from Meizhou Bay (an embayment in Fujian Province, southeastern China) is described and illustrated. The diagnostic character of the new species is the structure and armature of the fi fth leg, which is represented by a single lobe armed with three naked setae subequal in length. The new species closely resembles Cymbasoma bowmani Suárez- Morales and Gasca, 1998 in the structure of the fi fth legs, and the body proportions, including total body length, and relative lengths of the cephalothorax and the genital double somite. However, Cymbasoma cheni sp. nov. is distinguished by lack of cuticular ornamentation on the cephalothorax, the position of the oral papilla, and the structure of the fi fth leg with three naked setae. Although the structure of the fi fth legs is similar in Cymbasoma cheni sp. nov. and Cymbasoma quintanarooense (Suárez-Morales, 1994), the new species can be easily distinguished from Cymbasoma quintanarooense by the relative length of the antennule, diff erences in the genital double-somite and the ovigerous spines, and the shape of ocelli. This is the sixth record of this genus from China seas.