A new oligotrich (Ciliophora,Oligotrichia) from Argentina,with redefinition of Novistrombidium Song and Bradbury |
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| Institution: | 1. División Invertebrados, Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”, Buenos Aires, Argentina;2. Laboratório de Protistologia, Instituto de Biologia, Departamento de Zoologia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil;3. Laboratório de Biologia Molecular “Francisco Mauro Salzano”, Instituto de Ciências Biológicas, Universidade Federal do Pará, Belém, PA, Brazil;4. Instituto de Limnología “Dr. R. A. Ringuelet”, La Plata, Buenos Aires, Argentina;1. Ciliate Biology Lab, SGTB Khalsa College, University of Delhi, Delhi, 110007, India;2. Room No. 18, Fish Molecular Lab, Department of Zoology, University of Delhi, North Campus, Delhi, 110007, India;1. Laboratory of Protozoology, Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, School of Life Science, South China Normal University, Guangzhou, China;2. Institute of Microbial Ecology and Matter Cycle, School of Marine Sciences, Sun Yat-sen University, Zhuhai 519082, China;3. Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China;1. Laboratory of Protozoology, Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao, 266003, China;2. Laboratory of Protozoology, College of Life Science, South China Normal University, Guangzhou, 510631, China;3. Zoology Department, College of Science, King Saud University, PO Box 2455, Riyadh, 11451, Saudi Arabia;1. Department of Zoology, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, Mlynská dolina B-1, 842 15 Bratislava, Slovak Republic;2. FB Ecology and Evolution, Faculty of Natural Sciences, Paris Lodron University of Salzburg, Hellbrunnerstrasse 34, 5020 Salzburg, Austria;1. Laboratory of Protozoological Biodiversity and Evolution in Wetland, College of Life Sciences, Shaanxi Normal University, Xi’an 710119, China;2. Key Laboratory for Space Bioscience and Biotechnology, Institute of Special Environmental Biophysics, School of Life Sciences, Northwestern Polytechnical University, Xi’an 710072, China;1. A.V. Zhirmunsky National Scientific Center of Marine Biology, Palchevskogo str. 17, Vladivostok, 690041, Russia;2. Senckenberg am Meer, German Centre for Marine Biodiversity Research (DZMB), Südstrand 44, D – 26382 Wilhelmshaven, Germany |
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| Abstract: | A new oligotrich similar to Novistrombidium was discovered in plankton samples from an artificial tributary of the Salado River, Buenos Aires province, Argentina, in summer 2010. Propecingulum fistoleramalliei sp. n. has an obovate and anteriorly truncated body, with a conspicuous ventral furrow, is flattened ventrally, and has a prominent right apical protrusion. It temporarily attaches to the substratum by a posterior mucous thread. Rod-shaped extrusomes arranged equidistantly and insert directly above the girdle kinety. The macronucleus is globular to ellipsoidal. The contractile vacuole is located in the left, anterior quarter of the cell and the adoral zone is composed of 30–35 collar, 9–14 buccal, and two thigmotactic membranelles. The girdle kinety is dextrally spiraled and ventrally open; the ventral kinety is posterior to anterior end of the girdle kinety. The oral primordium develops posterior to the right thigmotactic membranelle and anterior the stripe of extrusomes above left, lateral portion of the girdle kinety. The SSUrDNA phylogeny confirms one more time that Novistrombidium is not monophyletic; consequently, we elevate the subgenus Propecingulum up to genus rank and redefine the genus Novistrombidium. |
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| Keywords: | Molecular phylogeny Morphology Oligotrichia |
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