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Two New and Two Poorly Known Species of Ancistrum (Ciliophora, Scuticociliatia, Thigmotrichida) Parasitizing Marine Molluscs from Chinese Coastal Waters of the Yellow Sea
Xu, Kuidong1,2; Song, Weibo2; Warren, Alan3
2015
发表期刊ACTA PROTOZOOLOGICA
卷号54期号:3页码:195-208
文章类型Article
摘要The morphology and taxonomy of two new and two poorly known ciliate species of Ancistrum, found in the mantle cavity (mainly on gills) of marine molluscs from culture beds and pools along the Chinese coast of the Yellow Sea, were investigated using living observation and silver impregnation. Ancistrum haliotis n. sp. was isolated from the abalone Haliotis discus hannai Ino, A. crassum Fenchel, 1965 from the purple clam Saxidomus purpuratus (Sowerby), A. acutum n. sp. from the surf clam Mactra veneriformis Reeve, and A. japonicum Uyemura, 1937 from both the venus clam Cyclina sinensis (Gmelin) and from Dosinia japonica (Reeve). Ancistrum haliotis differs from its most similar relative A. mytili (Quennerstedt, 1867) by the body outline (anterior portion narrower vs. wider than the posterior portion), the macronuclear shape (broadly ellipsoidal vs. reniform or sausage-like), and by having fewer somatic kineties (28-32 vs. usually more than > 40). Ancistrum crassum is characterized by the naked area at the apical end of the cell, the relatively short buccal field occupying about two thirds of the body length, and the posterior-dorsal cone-shaped prolongation. Ancistrum acutum n. sp. and A. japonicum are almost identical in morphometry, but differ distinctly in the live morphology (anterior end pointed and posterior end rounded vs. anterior end narrowly rounded and posterior-dorsal end protruded) and ciliary pattern (all right-side kineties extend to posterior body end vs. all right-side kineties excluding somatic kinety 1 distinctly shortened posteriad, forming a glabrous zone). We neotypify Ancistrum japonicum and discuss the taxonomic status of the four species. Based on an evaluation of all nominal species of Ancistrum and Ancistrumina, we recognize nine valid species of Ancistrum and provide a tabular guide to their identification. Fenchelia Raabe, 1970 is regarded as a junior synonym of Ancistrum Maupas, 1883. We synonymize Ancistrumina nucellae Khan, 1970 with Ancistrum japonicum Uyemura, 1937 and Ancistrum edajimanum Oishi, 1978 with A. crassum Fenchel, 1965.
关键词AN.istrum Haliotis N. Sp. Ancistrum Crassum AN.istrum Acutum N. Sp. Ancistrum Japonicum Marine Parasitic Ciliate Morphology Neotype New Species Taxonomy
DOI10.4467/16890027AP.15.016.3213
收录类别SCI
语种英语
WOS记录号WOS:000360378300004
引用统计
文献类型期刊论文
条目标识符http://ir.qdio.ac.cn/handle/337002/50267
专题海洋生物分类与系统演化实验室
作者单位1.Chinese Acad Sci, Dept Marine Organism Taxon & Phylogeny, Inst Oceanol, Qingdao 266071, Peoples R China
2.Ocean Univ China, Lab Protozool, Inst Evolut & Marine Divers, Qingdao 266003, Peoples R China
3.Nat Hist Museum, Dept Life Sci, London SW7 5BD, England
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Xu, Kuidong,Song, Weibo,Warren, Alan. Two New and Two Poorly Known Species of Ancistrum (Ciliophora, Scuticociliatia, Thigmotrichida) Parasitizing Marine Molluscs from Chinese Coastal Waters of the Yellow Sea[J]. ACTA PROTOZOOLOGICA,2015,54(3):195-208.
APA Xu, Kuidong,Song, Weibo,&Warren, Alan.(2015).Two New and Two Poorly Known Species of Ancistrum (Ciliophora, Scuticociliatia, Thigmotrichida) Parasitizing Marine Molluscs from Chinese Coastal Waters of the Yellow Sea.ACTA PROTOZOOLOGICA,54(3),195-208.
MLA Xu, Kuidong,et al."Two New and Two Poorly Known Species of Ancistrum (Ciliophora, Scuticociliatia, Thigmotrichida) Parasitizing Marine Molluscs from Chinese Coastal Waters of the Yellow Sea".ACTA PROTOZOOLOGICA 54.3(2015):195-208.
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