Morphology and SSU rRNA Gene Sequences of Three Marine Ciliates from Yellow Sea, China, Including One New Species, Uronema heteromarinum nov. spec. (Ciliophora, Scuticociliatida)
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RIS BIB ENDNOTEMorphology and SSU rRNA Gene Sequences of Three Marine Ciliates from Yellow Sea, China, Including One New Species, Uronema heteromarinum nov. spec. (Ciliophora, Scuticociliatida)
Publication date: 2010
Acta Protozoologica, 2010, Volume 49, Issue 1 , pp. 45 - 59
Authors
Morphology and SSU rRNA Gene Sequences of Three Marine Ciliates from Yellow Sea, China, Including One New Species, Uronema heteromarinum nov. spec. (Ciliophora, Scuticociliatida)
The morphology, infraciliature, and silverline system of three marine scuticociliates, Uronema marinum Dujardin, 1841, U. heteromarinum nov. spec. and Pleuronema setigerum Calkins, 1902, isolated from coastal waters off Qingdao, China, were investigated using living observation and silver impregnation methods. Due to the great confusion in the species definition of the well-known species U. marinum, we have documented a detailed discussion/comparison and believe that most of the confusion is due to the fact that at least 2 closely-related sibling morphotypes exist which are often not recognized. Based on the data available, U. marinum is strictly defined as follows: marine Uronema ca. 30 × 10 μm in size, with truncated apical frontal plate and smooth pellicle, extrusomes inconspicuous, cytostome located equatorially, 12–14 somatic kineties and one contractile vacuole pore near posterior end of kinety 2. Uronema heteromarinum nov. spec. resembles U. marinum but can be distinguished morphologically by its notched pellicle with conspicuous extrusomes and reticulate ridges, the 15–16 somatic kineties, widely separated membranelle 1 and membranelle 2, as well as the subequatorially positioned cytostome. Based on the Qingdao population, an improved diagnosis for the poorly known Pleuronema setigerum is: marine slender oval-shaped form, in vivo about 40–50 × 15–20 μm; 3–5 preoral kineties and 14–22 somatic kineties; membranelle 1 and 3 three-rowed, and posterior end of M2a ring-like. The small subunit (SSU) rRNA gene for all three organisms were sequenced and analyzed with standard methods.
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Information: Acta Protozoologica, 2010, Volume 49, Issue 1 , pp. 45 - 59
Article type: Original article
Shanghai Ocean University, Shanghai, China
Laboratory of Protozoology, Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao, China; Department of Zoology, Natural History Museum, Cromwell Road, London, UK
Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China
Laboratory of Protozoology, Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao, China; Department of Zoology, Natural History Museum, Cromwell Road, London, UK
Laboratory of Protozoology, Guangdong Provincial Key Laboratory for Healthy and Safe Aquaculture, South China Normal University, Guangzhou, China; Laboratory of Protozoology, Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao, China;
Zoology Department, King Saud University, Riyadh, Saudi Arabia
Institute of Evolution and Marine Biodiversity & Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, China
Laboratory of Protozoology, Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao, China
Published at: 2010
Article status: Open
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