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	A new spirofilid ciliate from the yellow sea: Metastrongylidium distichum n gen, n sp (ciliophora, stichotrichia)
	Xu, Kuidong; Lei, Yanli
刊名	ACTA PROTOZOOLOGICA
	2007
卷号	46期号:2页码:121-129
关键词	Marine Ciliate Metastrongylidium Distichum New Genus New Species Strongylidium Taxonomy
ISSN号	0065-1583
文献子类	Article
英文摘要	The morphology and infraciliature of a new ciliate, Metastrongylidium distichum, isolated from the Yellow Sea, are investigated using live observation and protargol impregnation. Metastrongylidium distichum is about 170 x 40 pm in vivo, clavate to elongate ellipsoidal with bluntly pointed posterior end, and has two macronuclear nodules, six distinctly large buccal and frontal cirri, three dorsal kineties and two each of spiralled ventral and marginal cirral rows. These features indicate a generic allocation in Strongylidium Sterki, 1878. However, the new ciliate has a distinct feature not recognizable in Strongylidiurn, viz., the presence of (three or four) transverse cirri. Thus, we propose a new genus Metastrongylidium for the new species, M distichum nov. gen., n. sp. Metastrongylidium belongs to the family Spirofilidae, where it differs from Mucotrichidium by the lack of postperistomial cirrus and the different frontal and ventral cirral pattern. Metastrongylidium distichum is easily distinguishable from the seemingly similar species Strongylidium californicum Kahl, 1932 by the macronuclear pattern (invariably 2 vs. many nodules). It highly resembles the poorly known species S. contortum (Gelei 1954) Borror, 1972 in the body outline and nuclear pattern, differing in the biotope, the posterior cirral pattern, and the arrangement of right marginal row.; The morphology and infraciliature of a new ciliate, Metastrongylidium distichum, isolated from the Yellow Sea, are investigated using live observation and protargol impregnation. Metastrongylidium distichum is about 170 x 40 pm in vivo, clavate to elongate ellipsoidal with bluntly pointed posterior end, and has two macronuclear nodules, six distinctly large buccal and frontal cirri, three dorsal kineties and two each of spiralled ventral and marginal cirral rows. These features indicate a generic allocation in Strongylidium Sterki, 1878. However, the new ciliate has a distinct feature not recognizable in Strongylidiurn, viz., the presence of (three or four) transverse cirri. Thus, we propose a new genus Metastrongylidium for the new species, M distichum nov. gen., n. sp. Metastrongylidium belongs to the family Spirofilidae, where it differs from Mucotrichidium by the lack of postperistomial cirrus and the different frontal and ventral cirral pattern. Metastrongylidium distichum is easily distinguishable from the seemingly similar species Strongylidium californicum Kahl, 1932 by the macronuclear pattern (invariably 2 vs. many nodules). It highly resembles the poorly known species S. contortum (Gelei 1954) Borror, 1972 in the body outline and nuclear pattern, differing in the biotope, the posterior cirral pattern, and the arrangement of right marginal row.
语种	英语
WOS记录号	WOS:000249249300005
公开日期	2010-12-30
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.qdio.ac.cn/handle/337002/6315]
专题	海洋研究所_海洋生物分类与系统演化实验室
作者单位	Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Xu, Kuidong,Lei, Yanli. A new spirofilid ciliate from the yellow sea: Metastrongylidium distichum n gen, n sp (ciliophora, stichotrichia)[J]. ACTA PROTOZOOLOGICA,2007,46(2):121-129.
APA	Xu, Kuidong,&Lei, Yanli.(2007).A new spirofilid ciliate from the yellow sea: Metastrongylidium distichum n gen, n sp (ciliophora, stichotrichia).ACTA PROTOZOOLOGICA,46(2),121-129.
MLA	Xu, Kuidong,et al."A new spirofilid ciliate from the yellow sea: Metastrongylidium distichum n gen, n sp (ciliophora, stichotrichia)".ACTA PROTOZOOLOGICA 46.2(2007):121-129.

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