Ceratomyxa seriolae n. sp. and C. buri n. sp. (Myxozoa: Myxosporea) from the gall-bladder of cultured yellowtail Seriola quinqueradiata |
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| Authors: | Yokoyama Hiroshi Fukuda Yutaka |
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| Institution: | (1) Department of Aquatic Bioscience, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi 1-1-1, Bunkyo, Tokyo, 113-8657, Japan;(2) Aquaculture and Environment Division, Oita Institute of Marine and Fisheries Science, Kamiura, Minami-Amabe, Oita, 879-2602, Japan |
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| Abstract: | Ceratomyxa seriolae n. sp. and C. buri n. sp. (Myxozoa: Myxosporea) were found in the gall-bladder of cultured yellowtail Seriola quinqueradiata Temminck & Schlegel (Carangidae) in Japan. Mature spores of C. seriolae n. sp. were elongate and 6.5 (6.0-7.5)  m long and 33.7 (28.0-41.5) m thick. Disporous plasmodia of C. seriolae n. sp., 40-100 m in size, were amoeboid to spherical. C. buri n. sp. were elliptical with a flattened posterior end, 6.5 (5.5-7.5) m long and 14.3 (11.0-16.5) m thick. Spherical plasmodia of C. buri n. sp., 15-20 m in diameter, were disporous. In periodical sampling of yellowtail bile from August, 1999 to February, 2000, the two new species of Ceratomyxa, as well as Myxobolus spirosulcatus Maeno, Sorimachi, Ogawa & Kearn 1995, first appeared in October, and the prevalences were very variable (20-100%) during the study period. |
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