Taxonomy and molecular phylogeny of three freshwater scuticociliates,with descriptions of one new genus and two new species (Protista,Ciliophora, Oligohymenophorea) |
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| Affiliation: | 1. Department of Biological and Environmental Sciences, Troy University, Troy, AL, 36082, United States;2. University of Georgia, Skidaway Institute of Oceanography, Savannah, GA, 31411, United States;3. Mercer University School of Medicine, Macon, GA, 31207, United States;1. Laboratorio de Protozoología, Facultad de Ciencias, Universidad Nacional Autónoma de México (UNAM), Circuito Ext. s/núm. Ciudad Universitaria, Av. Universidad 3000, Coyoacán C.P. 04510, Ciudad de México, Mexico;2. Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao 266003, China;1. Institute of Evolution and Marine Biodiversity and Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, China;2. School of Life Sciences, East China Normal University, Shanghai 200241, China;3. Marine College, Shandong University, Weihai 264209, China;4. Department of Life Sciences, Natural History Museum, London SW7 5BD, UK;1. School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand;2. Department of Botany, University of British Columbia, Vancouver V6T 1Z4, Canada;3. The Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences, Wuhan 430072, PR China;4. Department of Integrative Biology, University of Guelph, Guelph, ON N1G 2W1, Canada;1. Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China;2. Laboratory of Protozoology, Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao 266003, China;3. Zoology Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;4. Department of Biological Sciences, Boise State University, Boise 83725, USA;1. Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;2. Department of Ecology, University of Kaiserslautern, Kaiserslautern 67653, Germany |
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| Abstract: | Three freshwater scuticociliates, Apouronema harbinensis gen. nov. spec. nov., Cyclidium vorax spec. nov., and C. glaucoma Müller, 1773, collected from rivers in Hulan District, Harbin, northeastern China, were investigated using morphological and phylogenetic criteria. Apouronema gen. nov., assigned to the family Uronematidae, is mainly distinguished from the other genera of the family by its paroral membrane extending anteriorly to the middle of membranelle 1. Apouronema harbinensis spec. nov. is defined by body size in vivo about 45–55 × 20–25 μm, buccal field about 70–80% of cell length; 12 or 13 somatic kineties; membranelle 1 having two rows, with 16–18 basal bodies in each kinety; membranelle 2 and membranelle 3 both having two rows each; scutica X-shaped with five pairs of basal bodies. Cyclidium vorax spec. nov. is characterized by the following features: body size 35–40 × 18–20 μm in vivo; 9 or 10 somatic kineties; membranelle 1 having two longitudinal rows, much shorter than M2; M2 triangle-shaped. The phylogenetic analyses show that: (1) Apouronema clustered in the Uronematidae clade, and grouped with genera Uronemita and Uronema; (2) Cyclidium vorax spec. nov. grouped with C. glaucoma and C. sinicum, which supports the assignment of the new species to the genus Cyclidium; (3) Cyclidium remains non-monophyletic with the addition of the new sequence. |
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| Keywords: | New genus Phylogeny Scuticociliates |
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