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孙世春,许苹.2018.中国沿海首次发现耳盲属(有针纲:单针目:耳盲科)间隙纽虫.动物学杂志,53(2):249-254.
中国沿海首次发现耳盲属(有针纲:单针目:耳盲科)间隙纽虫
First Record of Interstitial Nemerteans of the Genus Ototyphlonemertes (Enopla: Monostilifera: Ototyphlonemertidae) from China
投稿时间:2017-05-25  修订日期:2018-03-09
DOI:10.13859/j.cjz.201802010
中文关键词:  纽形动物门  耳盲科  长座耳盲纽虫  马丁诺夫耳盲纽虫  中国新纪录
英文关键词:Nemertea  Ototyphlonemertidae  Ototyphlonemertes dolichobasis  Ototyphlonemertes martynovi  New geographic records
基金项目:国家自然科学基金项目(No. 31471957)
作者单位E-mail
孙世春 中国海洋大学海洋生物多样性与进化研究所 青岛 266003 sunsc@ouc.edu.cn 
许苹 中国海洋大学海洋生物多样性与进化研究所 青岛 266003 xuping1212@126.com 
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中文摘要:
      耳盲属(Ototyphlonemertes)是一类体型细小、具平衡囊、于海洋沙间隙生活的特殊的纽虫,在全球沿海、特别是热带和亚热带海区广泛分布,但在中国沿海尚报道。近年在青岛(36°03′ N,120°21′ E)潮间带粗沙中采到了耳盲纽虫标本,经形态鉴定包含长座耳盲纽虫(Ototyphlonemertes dolichobasis)和马丁诺夫耳盲纽虫(O. martynovi)两种。长座耳盲纽虫过去仅在模式产地日本大土湾发现,与原始描述相比,青岛的标本个体较大,针座及主针略小,但针座长与针座宽、主针长与针座长的比例与原始描述一致。青岛的马丁诺夫耳盲纽虫标本与原始描述形态一致,唯个体较小,其头触毛公式与在越南文峰湾报道的近似种Ototyphlonemertes cf. martynovi不同。标本保存于中国海洋大学海洋生物多样性与进化研究所。
英文摘要:
      The nemertean genus Ototyphlonemertes includes small and slender nemerteans that inhabit the interstitial spaces of marine sands. They are known to occur all over the world, but have not been reported from China seas. Recent years, we collected Ototyphlonemertes specimens from intertidal coarse sand in Qingdao (36o03′N, 120o21′E). After being relaxed with 7.5% MgCl2, specimens were observed and photographed under microscope. Two species, O. dolichobasis Kajihara, 2007 (Fig. 1) and O. martynovi Chernyshev, 1993 (Fig. 2), were identified by morphological studies. Present specimens of O. dolichobasis, which was characterized by an extremely long stylet basis and was previously known only from its type locality (Otsuchi Bay, Iwate Prefecture, Japan), have a larger body size, and a smaller central stylet and basis than those in the original description, but the ratios of “basis length / basis width” and “central stylet length / basis length” are the same as in the original description. Except being smaller in body size, the present O. martynovi specimens are well accordant to the original description. The head bristle formula of present specimens, like that of the type specimens from Peter the Great Bay, is different from O. cf. martinovi from Van Phong Bay, Vietnam. Present specimens are deposited at Institute of Evolution and Marine Biodiversity, Ocean University of China.
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