Two new species of the genus Stenamoeba (Discosea,Longamoebia): Cytoplasmic MTOC is present in one more amoebae lineage |
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| Institution: | 1. Department of Invertebrate Zoology, Faculty of Biology and Soil Sciences, Saint Petersburg State University, Russia;2. Department of Terrestrial Ecology, Faculty of Zoology, University of Cologne, Germany;1. Ookusa Animal Clinic, Ookusa 503, Matsue, Shimane 690-0032, Japan;2. Department of Parasitology, Nippon Veterinary and Life Science University, Musashino, Tokyo 180-8602, Japan;1. Centre for Limnology, Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, 61117 Rannu, Tartu, Estonia;2. Department of Aquaculture, Institute of Veterinary Medicine and Animal Sciences, Estonian University of Life Sciences, 48 Kreutzwaldi Street, Tartu, Estonia;1. Université de Poitiers, UMR CNRS 7267, Ecologie et Biologie des Interactions (EBI), Poitiers, France;2. EAU DE PARIS, Direction de la Recherche & Développement et de la Qualité des eaux (DRDQE), Paris, France;1. Laboratory of Cell Biology, Institute of Biomedical Sciences (ICBAS/UP), University of Porto, 4050-313 Porto, Portugal;2. Laboratory of Animal Pathology, Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/UP), University of Porto, 4050-123 Porto, Portugal;3. Zoology Department, College of Science, King Saud University, 11451 Riyadh, Saudi Arabia;4. Edilson Matos Research Laboratory, Federal University of Pará (UFPa), 66000 Belém, PA, Brazil;5. Carlos Azevedo Research Laboratory, Federal Rural University of Amazonia (UFRA), 66077-530 Belém, PA, Brazil;6. Department of Sciences, High Institute of Health Sciences-North (CESPU), 4585-116 Gandra, Portugal;1. University Institute of Tropical Diseases and Public Health of the Canary Islands, University of La Laguna, La Laguna, Tenerife, Canary Islands, Spain;2. Centre for Integrative Physiology, School of Biomedical Sciences, University of Edinburgh, Edinburgh, Scotland, UK;3. Immunohistochemistry Laboratory, National Hospital Cayetano Heredia, Lima, Peru;4. Medical Technology School, Universidad Peruana Cayetano Heredia, Lima, Peru;5. School of Medicine, Universidad Peruana Cayetano Heredia, Lima, Peru |
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| Abstract: | Two new species of the recently described genus Stenamoeba, named S. berchidia and S. sardiniensis were isolated from a single soil sample on Sardinia, Italy. Both share morphological features characteristic to Stenamoeba and form in phylogenetic analyses together with other Stenamoeba spp. a highly supported clade within the family Thecamoebidae. The ultrastructural investigation of Stenamoeba sardiniensis revealed the presence of cytoplasmic microtubule-organizing centers (MTOCs), located close to one of several dictyosomes found inside the cell. This is the first report of cytoplasmic MTOCs among Thecamoebidae. The presence of MTOCs is now shown in five of nine orders comprising the class Discosea and potentially could be a phylogenetic marker in this group. We re-isolated Stenamoeba limacina from German soils. This strain shows a similar morphology and an almost complete SSU rDNA sequence identity with the type strain of S. limacina originating from gills of fishes, collected in Czech Republic. |
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| Keywords: | Amoebozoa Discosea MTOC Morphology Phylogeny Ultrastructure |
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