Hyalophysa lynni n. sp. (Ciliophora,Apostomatida), a new pathogenic ciliate and causative agent of shrimp black gill in penaeid shrimp |
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| Institution: | 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. Laboratory of Protozoology, Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, College of Life Science, South China Normal University, Guangzhou 510631, China;2. Laboratory of Protozoology, Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao 266003, China;3. Zoology Department, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia;1. Division of Polar Life Sciences, Korea Polar Research Institute, Incheon 21990, South Korea;2. Department of Biological Sciences, Inha University, Incheon 22212, South Korea;3. Department of Biological Resources Research, National Institute of Biological Resources, Incheon 22689, South Korea;4. Department of Biology, Gangneung-Wonju National University, Gangneung 25457, South Korea;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. Department of Zoology, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovi?ova 6, 842 15 Bratislava, Slovakia;2. Department of Biosciences, Faculty of Natural Sciences, Paris Lodron University of Salzburg, Hellbrunnerstrasse 34, 5020 Salzburg, Austria |
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| Abstract: | The parasitic ciliate causing shrimp black gill (sBG) infections in penaeid shrimp has been identified. The sBG ciliate has a unique life cycle that includes an encysted divisional stage on the host’s gills. The ciliature of the encysted trophont stage has been determined and is quite similar to that of the closely related apostomes Hyalophysa bradburyae and H. chattoni. Hyalophysa bradburyae is a commensal ciliate associated with freshwater caridean shrimp and crayfish, while H. chattoni is a common commensal found on North American marine decapods. Based on 18S rRNA gene sequence comparisons, the sBG ciliate is more closely related to the marine species H. chattoni than to the freshwater species H. bradburyae. The unique life cycle, morphology, 18S rRNA gene sequence, hosts, location, and pathology of the sBG ciliate distinguish this organism as a new species, Hyalophysa lynni n. sp. |
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| Keywords: | Apostome ciliate Parasite Shrimp black gill White shrimp |
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