New collections of blood flukes (Aporocotylidae) from fishes of the tropical Indo-west Pacific,including a new genus,two new species and molecular evidence that Elaphrobates chaetodontis (Yamaguti, 1970) is widespread in the region |
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| Affiliation: | 1. The University of Queensland, School of Biological Sciences, Brisbane, Queensland 4072, Australia;1. School of Biological Sciences, The University of Queensland, Brisbane, Queensland 4072, Australia;2. Department of Life Sciences, Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom;3. Fish Health Laboratory, Department of Fisheries Western Australia, 3 Baron-Hay Court, South Perth, Western Australia 6151, Australia;4. Centre for Sustainable Tropical Fisheries and Aquaculture, College of Marine and Environmental Sciences, James Cook University, Cairns, Queensland 4878, Australia;5. The Faculty of Veterinary Medicine, Sudirman Campus, Universitas Udayana, Jalan Kampus Udayana, Denpasar 80361, Indonesia;6. Faculty of Agricultural and Environmental Sciences, Aquaculture and Sea-ranching, University Rostock, Justus-von-Liebig Weg 6, 18059 Rostock, Germany;1. Southeastern Cooperative Fish Parasite and Disease Laboratory (SCFPDL) and Aquatic Parasitology Laboratory (APL), School of Fisheries, Aquaculture, and Aquatic Sciences, College of Agriculture, Auburn University, 203 Swingle Hall, Auburn, AL 36849, USA;2. Molette Biology Laboratory for Environmental and Climate Change Studies (MBL), Department of Biological Sciences, Auburn University, 101 Rouse Life Sciences Bldg., Auburn, AL 36849, USA;3. Nha Trang University, Department of Biology, Institute for Biotechnology and Environment, 02 Nguyen Dinh Chieu Street, Nha Trang City, Vietnam;4. Fish and Wildlife Health Group, Fish and Wildlife Research Institute (FWRI), Florida Fish and Wildlife Conservation Commission, 100 8th Avenue Southeast, St. Petersburg, FL 33701-5020, USA |
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| Abstract: | We report new collections of the Aporocotylidae from Australia, French Polynesia, and Japan. A new species of Cardicola Short, 1953 is described from Scomberomorus commerson (Lacépède) (Scombridae), off Lizard Island. Cardicola nolani n. sp. can be distinguished from its congeners based on the position of the oötype, the position of the male genital pore, and the absence of an oral sucker. A new species is described from Abalistes stellatus (Anonymous) (Balistidae), also from off Lizard Island. Phylogenetically the new species forms a strongly-supported clade with Cardicola yuelao Yong, Cutmore & Cribb, 2018, which also infects balistids. These two species are distinct from all other aporocotylids in the combination of exceptionally short anterior and long posterior caeca, a lanceolate body, a single testis, an entirely post-ovarian uterus and the position of the oötype; a new genus, Balistidicola, is proposed for them. Balistidicola corneri n. sp. and B. yuelao (Yong, Cutmore & Cribb, 2018) n. comb. are essentially morphologically cryptic, only distinguishable by the form of the spination (B. corneri has five spines per row and B. yuelao has six). Elaphrobates chaetodontis (Yamaguti, 1970) is reported from 21 species of butterflyfishes (Chaetodontidae) from nine locations in tropical Indo-west Pacific; cox1 sequence data demonstrate extensive geographical structuring in this species. Braya jexi Nolan & Cribb, 2006, Elaphrobates milleri (Nolan & Cribb, 2006), and P. corventum Overstreet & Køie, 1989 are each re-reported from their type-hosts, and Pearsonellum pygmaeus Nolan & Cribb, 2004 and Balistidicola yuelao are each reported from a new host. |
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