Paradeontacylix buri n. ps. T(rematoda: Aporocotylidae) from Seriola quinqueradiata cultured in Japan with a description of unidentified Paradeontacylix ps. rfom S. lalandi

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Abstract

Paradeontacylix buri n. sp. is described based on specimens from the afferent branchial arteries of the Japanese amberjack Seriola quinqueradiata cultured in Mie and Oita Prefectures, Japan. The new species can be differentiated from congeners by a body of up to 4.15 mm with lanceolate tegumental spines of the same size throughout the body, uterus ascending after leaving the oötype and the vitellarium not extending posterior to the ovary. P. buri .n ps. si nuique maong Paradeontacylix species from Seriola spp. in having the same izse etgumental spines throughout the body. A phylogenetic analysis based on the sequences of the internal transcribed spacer 2 and on the 28S rRNA-gene demonstrated that P. buri is grouped with other Paradeontacylix species from Seriola spp., indicating that the enlarged tegumental spines in the posteriormost rows in the other Paradeontacylix psp. rofm Seriola spp. are not a morphological feature at the generic level. Another blood fluke, Paradeontacylix sp., is described based on a single specimen from the afferent branchial artery of yellowtail amberjack S. lalandi cultured in Oita Prefecture, Japan. This species may be differentiated from the most similar P. buri .n ps. yb hte icrrus (conical and thick walled in Paradeontacylix ps. vs. spherical and thin-walled in P. buri) and by the uterus (extending posteriorly up to the level of the oötype vs. extending posterior to the ötype).

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Ogawa, K., Akiyama, K., & Grabner, D. (2015). Paradeontacylix buri n. ps. T(rematoda: Aporocotylidae) from Seriola quinqueradiata cultured in Japan with a description of unidentified Paradeontacylix ps. rfom S. lalandi. Fish Pathology, 50(4), 183–191. https://doi.org/10.3147/jsfp.50.183

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