- 著者
- Ming-Chih Huang Nobuhiro Saito Michitaka Shimomura
- 出版者
- Carcinological Society of Japan
- 雑誌
- Crustacean Research (ISSN:02873478)
- 巻号頁・発行日
- vol.47, pp.43-53, 2018-06-30 (Released:2018-06-30)
- 参考文献数
- 16
- 被引用文献数
- 6
Holophryxus fusiformis Shiino, 1937, a species of dajid isopod that attaches to the carapace of sakura shrimp, Lucensosergia lucens (Hansen, 1922), is reported from the sea of Taiwan for the first time. This species was first described as infesting Prehensilosergia prehensilis (Bate, 1881) from Kanbara, Shizuoka Prefecture, Japan. The current finding represents the second occurrence of H. fusiformis and identifies a new host. Approximately 1% of the sakura shrimps in Yilan, Taiwan are infected by H. fusiformis. Holophryxus fusiformis has been found offshore from both Yilan, Taiwan and Nagasaki and in Suruga Bay, Japan; thus, the distribution of the parasite possibly follows the Kuroshio Current. When large quantities of parasites occur in the sea of Taiwan, the parasites are likely to flow into the Japanese waters along with the Kuroshio Current, subsequently influencing the production of the Japanese sakura shrimps. The establishment of a monitoring program for infection of the dajid in sakura shrimps between Taiwan and Japan is recommended. This study provides additional information on this species, including a new host, distribution, redescription, infection rate, and morphological variation.
- 著者
- Keiichi Kakui Michitaka Shimomura Shoichi Kimura Taeko Kimura
- 出版者
- The Japanese Society of Systematic Zoology
- 雑誌
- Species Diversity (ISSN:13421670)
- 巻号頁・発行日
- vol.24, no.1, pp.103-108, 2019-05-25 (Released:2019-05-25)
- 参考文献数
- 25
- 被引用文献数
- 1
In 2017, we collected a pair (male and female) of topotypic individuals of the parasitic isopod Pseudione nephropsi Shiino, 1951 from a single nephropid lobster, Metanephrops japonicus (Tapparone-Canefri, 1873), at 310–298 m depth off the eastern coast of the Kii Peninsula, Japan. Based on these specimens, we provide a supplementary description of the male and female morphology, and present mitochondrial cytochrome c oxidase subunit I (COI) DNA barcode sequences. The sequence length amplified with primer pair LCO-1490/HCO-2198 was 658 nt, and there were four synonymous nucleotide substitutions (0.6% p-distance) between the two sequences.
- 著者
- Hiroyuki Ariyama Nobuhiro Saito Michitaka Shimomura
- 出版者
- Carcinological Society of Japan
- 雑誌
- Crustacean Research (ISSN:02873478)
- 巻号頁・発行日
- vol.45, pp.29-35, 2016 (Released:2016-07-08)
- 参考文献数
- 13
- 被引用文献数
- 1 2
A new species of the euphausiid-ectoparasitic isopod in the genus Heterophryxus Sars, 1885 is described based on an immature female specimen collected from the central North Pacific. The new species, Heterophryxus pacificus, can be distinguished from the immature females of H. appendiculatus Sars, 1885 and H. elongatus Schultz, 1977 in having (1) a wider and thicker body, (2) a cephalon without an anterior hollow, and (3) complex-shaped pereomeres 2 to 4. A diagnosis of the genus Heterophryxus is provided.