著者
水町 海斗 中山 透 手良村 知功 遠藤 広光
出版者
一般社団法人 日本魚類学会
雑誌
魚類学雑誌 (ISSN:00215090)
巻号頁・発行日
pp.21-027, (Released:2022-02-08)
参考文献数
34

The parazenid genus Cyttopsis Gill, 1862 includes two valid species, C. rosea (Lowe, 1843), known from the Atlantic and Indo-west Pacific Oceans, and C. cypho (Fowler, 1934) restricted to the eastern Indian and western Pacific Oceans. Around Japan, the former species is common, whereas the latter has not been recorded to date. However, two Cyttopsis specimens [51.6 and 71.8 mm standard length (SL)] collected from Tosa Bay and Enshu-nada, Japan in 2008 and 2019, respectively, have been identified as C. cypho. In addition to previous means of distinguishing between the two species, a faint dark lateral spot posteriorly on the body (absent in C. rosea) and fewer lateral-line scales (55–64) in C. cypho (vs 73–82), the following additional diagnostic characters were found: interspace between spines on 4th and 5th abdominal scutes very narrow (C. cypho) vs. wide (C. rosea); orbit diameter 13.6–16.6% vs. 14.7–19.1% of SL; interorbital width 5.8–6.6% vs. 5.8–8.0% of SL; snout length 21.1–27.4% vs. 17.8–23.3% of SL; and mandible length 22.6–25.6% vs. 22.1–26.9% of SL. The two specimens, representing the first Japanese records of C. cypho (for which the new standard Japanese name “Ittenkagomatodai” is proposed), extend the northern range of the species from off northern Mindanao Island, Philippines (type locality).
著者
三澤 遼 木村 克也 水町 海斗 服部 努 成松 庸二 鈴木 勇人 森川 英祐 時岡 駿 永尾 次郎 柴田 泰宙 遠藤 広光 田城 文人 甲斐 嘉晃
出版者
一般社団法人 日本魚類学会
雑誌
魚類学雑誌 (ISSN:00215090)
巻号頁・発行日
pp.20-023, (Released:2020-10-02)
参考文献数
192

New distributional records of forty-five fish species off the Pacific coast of Tohoku District, northern Japan are reported, based on specimens trawled by the R/V Wakataka-maru (Japan Fisheries Research and Education Agency) during surveys in autumn of each year from 1995 to 2019. The records include northern distribution range extensions of 19 species, distribution gaps filled for 17 species, and northern and southern limits along the Pacific coast of Japan for eight and one species, respectively. Twenty-seven species were recorded off Tohoku District for the first time. In addition, taxonomic notes for each species, including some meristic and morphometric data from the collected specimens, are also provided.