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New host records of three Kudoa spp. (K. yasunagai, K. thalassomi, and K. igami) with notable variation in the number of shell valves and polar capsules in spores.
- Source :
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Parasitology research [Parasitol Res] 2019 Jan; Vol. 118 (1), pp. 143-157. Date of Electronic Publication: 2018 Dec 18. - Publication Year :
- 2019
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Abstract
- To date, 26 Kudoa spp. (Myxozoa: Myxosporea: Multivalvulida) have been recorded in edible marine fishes in Japan. In the future, it is likely that even more marine fish multivalvulid myxosporeans will be characterized morphologically and genetically, which will aid the precise understanding of their biodiversity and biology. We examined 60 individuals of six fish species collected from the Philippine Sea off Kochi or from the border between the Philippine Sea and East China Sea around Miyako Island, Okinawa, i.e., the southern part of Japan. Newly collected parasite species included Kudoa yasunagai from the brain of Japanese meagre (Argyrosomus japonicus) and Japanese parrotfish (Calotomus japonicus), Kudoa miyakoensis n. sp. and Kudoa thalassomi from the brain and trunk muscle, respectively, of bluespine unicornfish (Naso unicornis), and Kudoa igami from the trunk muscle of Carolines parrotfish (Calotomus carolinus), African coris (Coris gaimard), and Pastel ringwrasse (Hologymnosus doliatus). With the exception of Japanese parrotfish for K. yasunagai, all these fish are new host records for each kudoid species. Notable variation in the number of shell valves (SV) and polar capsules (PC) was observed for all four kudoid species. In particular, spores with seven or eight SV/PC were prominent in K. igami isolates, despite the original Japanese parrotfish-derived description characterizing it as having spores with six, or less commonly five, SV/PC. However, molecular genetic characterization based on the ribosomal RNA gene (rDNA) and mitochondrial DNA (cytochrome c oxidase subunit 1 and ribosomal RNA small and large subunits) found no significant differences in the nucleotide sequences of isolates with different phenotypical features as far as examined in the present study. A newly erected species, K. miyakoensis n. sp., was determined to be phylogenetically closest to brain-parasitizing species, such as K. chaetodoni, K. lemniscati, and K. yasunagai based on rDNA nucleotide sequences, but differed from them morphologically.
- Subjects :
- Animals
Base Sequence
Brain parasitology
Capsules metabolism
China
Host Specificity
Japan
Molecular Sequence Data
Muscle, Skeletal parasitology
Myxozoa classification
Myxozoa genetics
Myxozoa physiology
Perciformes classification
Perciformes parasitology
Phylogeny
Sequence Analysis, DNA
Spores classification
Spores genetics
Spores growth & development
Spores isolation & purification
Fish Diseases parasitology
Myxozoa isolation & purification
Parasitic Diseases, Animal parasitology
Subjects
Details
- Language :
- English
- ISSN :
- 1432-1955
- Volume :
- 118
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Parasitology research
- Publication Type :
- Academic Journal
- Accession number :
- 30565195
- Full Text :
- https://doi.org/10.1007/s00436-018-6144-8