Morphology,morphogenesis and molecular phylogeny of a freshwater ciliate,Monomicrocaryon euglenivorum euglenivorum (Ciliophora,Oxytrichidae) |
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| Affiliation: | 1. Laboratory of Protozoology, Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, School of Life Science, South China Normal University, Guangzhou 510631, China;2. The Key Laboratory of Biomedical Information Engineering, Ministry of Education, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an, China;3. Laboratory of Protozoology, Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao 266003, China;4. Department of Life Sciences, Natural History Museum, Cromwell Rd., London SW7 5BD, UK;1. Department of Biology, Gangneung-Wonju National University, Gangneung, South Korea;2. Institute of Science-Gifted Education, Gangneung-Wonju National University, Gangneung, South Korea;1. Department of Biology, Gangneung-Wonju National University, Gangneung, South Korea;2. Consulting Engineering Office for Ecology, Radetzkystrasse 10, 5020 Salzburg, Austria;1. Zoological Survey of India, Prani Vigyan Bhawan, M-Block, New Alipore, Kolkata 700 053, India;2. School of Bioscience and Veterinary Medicine, University of Camerino, Via Gentile III da Varano, 62032 Camerino, MC, Italy;1. The Key Laboratory of Biomedical Information Engineering, Ministry of Education, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an, China;2. Key Laboratory for Space Bioscience and Biotechnology, Institute of Special Environmental Biophysics, School of Life Sciences, Northwestern Polytechnical University, Youyi Xilu 127, 710072 Xi’an, China;1. Division of Life Sciences, Korea Polar Research Institute, Incheon 21990, South Korea;2. Department of Biological Sciences, Inha University, Incheon 22212, South Korea;3. Institute of Life Science & Natural Resources, Korea University, Seoul 02841, South Korea;4. Department of Biology, Gangneung-Wonju National University, Gangneung 25457, South Korea;5. Consulting Engineering Office for Ecology, Radetzkystrasse 10, 5020 Salzburg, Austria;1. The Key Laboratory of Biomedical Information Engineering, Ministry of Education, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an 710049, China;2. College of Life Science, Northwest Normal University, Lanzhou 730070, China |
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| Abstract: | The morphology, morphogenesis and molecular phylogeny of the oxytrichid ciliate, Monomicrocaryon euglenivorum euglenivorum (Kahl, 1932) Foissner, 2016, isolated from freshwater in a seaside park, Guangzhou, China, were investigated. Monomicrocaryon euglenivorum euglenivorum can be recognized as follows: caudal cirri in midline of body; dorsal kinety 1 without a one-kinetid-wide gap; transverse cirri acicular or rod-shaped with a fringed distal end; right marginal row commences at level of buccal vertex or anterior to buccal vertex. The main events during binary fission are as follows: (1) the proter retains the parental adoral zone of membranelles entirely; (2) frontoventral-transverse cirral anlagen I–VI are segmented in the ordinary pattern 1:3:3:3:4:4 from left to right, which form three frontal, four frontoventral, one buccal, three postoral ventral, two pretransverse ventral and five transverse cirri, respectively; (3) dorsal morphogenesis is in the typical Oxytricha-pattern, but fragmentation of dorsal kinety 3 is indistinct; and (4) three caudal cirri are formed, one at the posterior end of each of dorsal kineties 1, 2 and 4. Phylogenetic analyses based on SSU rDNA sequences showed that M. euglenivorum euglenivorum clustered with Kleinstyla dorsicirrata and Heterourosomoida lanceolata rather than with its congener M. elegans. The genus Monomicrocaryon is not monophyletic in this study; however, its monophyly is not rejected by the AU test. |
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| Keywords: | Hypotrichia Molecular systematics Ontogenesis SSU rDNA Taxonomy |
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