Ortholinea scatophagi (Myxosporea: Ortholineidae), a novel myxosporean infecting the spotted scat,Scatophagus argus (Linnaeus 1766) from southwest coast of India |
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| Affiliation: | 1. Key Laboratory of Aquatic Biodiversity and Conservation, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China;2. Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China;3. Department of Pathogenic Biology, School of Medicine, Jianghan University, Wuhan 430056, China;1. Department of Zoology, Sant Baba Bhag Singh University, Jalandhar, 144030, Punjab, India;2. Department of Zoology, Panjab University, Chandigarh, 160014, Chandigarh, India;1. Institute of Parasitology, Biology Centre, The Czech Academy of Sciences, České Budějovice, Czech Republic;2. Faculty of Science, University of South Bohemia, České Budějovice, Czech Republic;3. Institute of Ocean and Earth Sciences, University of Malaya, Kuala Lumpur, Malaysia;4. Department of Microbiology, Oregon State University, Corvallis, USA;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. Department of Zoology and Environmental Sciences, Punjabi University, Patiala, 147002, Punjab, India;2. Department of Zoology, Panjab University, Chandigarh, 160014, Chandigarh, India;1. Institute of Parasitology, Biology Centre of the Academy of Sciences of the Czech Republic, Branišovská 31, České Budějovice, Czech Republic;2. Department of Life Sciences, The Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom |
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| Abstract: | A new species of myxosporean, Ortholinea scatophagi n. sp. infecting the urinary bladder of the spotted scat, Scatophagus argus (Linnaeus 1766) is described. O. scatophagi n. sp. is characterized by spherical myxospores with a slightly flattened anterior end and equal spore valves with extra sutural ridges on its surface; measured 7.34 ± 0.67 μm in length, 6.90 ± 0.71 μm in width and 6.48 ± 0.37 μm in thickness. Two polar capsules, equal, spherical to oval in shape, arranged diametrically opposite and measured 2.59 ± 0.42 μm in length and 2.24 ± 0.35 μm in width. Polar filaments, 21.84 ± 2.86 μm long, with four to five coils. Scanning electron microscopy revealed the presence of extra sutural ridges on spore surface. Pansporoblasts spherical to irregular in shape, measured 31.08 ± 2.67 μm in length and 13.88 ± 5.40 μm in width; Monosporic, disporic and polysporic plasmodial stages were observed; plasmodia spherical or irregular in shape with granular cytoplasm containing refractile granules. The species was compared with 23 existing nominal species of Ortholinea, based on morphology and morphometry. Molecular analysis resulted in a 1773 bp long SSU rDNA sequence (GenBank accession number MN 310514). In phylogenetic analyses the present parasite clustered with other members of Ortholinea, under the freshwater urinary clade. Considering the morphologic, morphometric and molecular differences with previously described species of Ortholinea, and differences in host and geographic locations, the present species is treated as new and the name Ortholinea scatophagi n. sp.is proposed. |
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