著者

後藤 龍太郎 邉見 由美 Jonel Mangente Corral 塩﨑 祐斗 加藤 哲哉 伊谷 行

出版者

日本ベントス学会

雑誌

日本ベントス学会誌 (ISSN:1345112X)

巻号頁・発行日

vol.72, no.2, pp.79-82, 2018-03-31 (Released:2018-04-19)

参考文献数

21

被引用文献数

2

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Ikedosoma elegans (Ikeda, 1904) (Annelida: Echiura: Thalassematidae) is a rare, large deep-burrowing spoon worm that has been observed only in Japan. This species was first described based on the specimens collected from Misaki, Sagami Bay (Kanagawa Prefecture), eastern Japan, in 1902. Since the first description, this species has not been collected until the recent studies, which reported that I. elegans was collected from Hamana Lake (Shizuoka Prefecture), Boso Peninsula (Chiba Prefecture), and probably Amakusa, Ariake Sea (Kumamoto Prefecture). Furthermore, the specimen collected from Takasu, Seto Inland Sea (Okayama Prefecture) in 1975 was identified to be I. elegans. In this study, we present a new locality of this species in Japan. We collected a large individual of I. elegans with a probably commensal scale worm (Polynoidae: Polynoinae) by using a yabby pump in a mud flat in the Doki River Estuary, which is facing the Seto Inland Sea, in Marugame (Kagawa Prefecture), northern Shikoku Island. To the best of our knowledge, the present study is the first record of I. elegans from Shikoku Island and the second record from the Seto Inland Sea, following a 42-year-old record from Takasu, Okayama.

著者

山本 泰司 加藤 哲哉 太田 満 荒賀 忠一

出版者

京都大学フィールド科学教育研究センター瀬戸臨海実験所

雑誌

瀬戸臨海実験所年報 = Annual report of the Seto Marine Biological Laboratory (ISSN:09136002)

巻号頁・発行日

vol.21, pp.35-36, 2008-12-25

著者

小谷 敏 中林 貴子 有園 りえ 益満 聡子 田中 耕太郎 神宮寺 真吾 渡辺 明 満留 千賀 加藤 哲哉

出版者

鹿児島国際大学

雑誌

社会調査実習報告書

巻号頁・発行日

vol.10, pp.31-62, 1999-06

著者

佐藤 正典 加藤 哲哉 清家 弘治 伊谷 行

出版者

日本動物分類学会

雑誌

タクサ:日本動物分類学会誌 (ISSN:13422367)

巻号頁・発行日

vol.41, pp.30-39, 2016-08-30 (Released:2017-02-07)

参考文献数

25

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The scale worm Hesperonoe hwanghaiensis Uschakov and Wu, 1959 (Annelida: Polynoidae) is recorded from eastern Japan, based on four specimens collected from Akkeshi Bay, Hokkaido, and Kashima-nada, Ibaraki Prefecture. In Akkeshi Bay, three specimens (body length of a complete specimen: 40 mm, body width without parapodia: 4.0–4.5 mm), which are the largest of all Japanese specimens including previous records, were found from mud and sand sediments at intertidal flats, where a mud shrimp Upogebia major (De Haan, 1841) was collected simultaneously. In Kashima-nada, a complete mature male specimen (body length: 23 mm, body width without parapodia: 2.7 mm) was collected by dredging at subtidal sandy bottom at a water depth of 7.6 m, where another mud shrimp Austinogebia narutensis (Sakai, 1986) was collected simultaneously. The morphological characteristics of these specimens basically agreed with those of the previous records on the specimens collected from western Japan, with a diagnostic characteristic of the presence of a row of the more conical macrotubercles (up to 28 in an elytron of the complete specimen from Akkeshi Bay, and up to 3 in that from Kashima-nada) on the posterior surface of the elytra in the larger specimen. The present result suggests that the scale worm is commensal with not only U. major but also A. narutensis in its habitats extending from intertidal flats in semi-enclosed inner bays to subtidal bottom in open coasts.