著者

岡本 誠 甲斐 嘉晃 三澤 遼 鈴木 勇人 時岡 駿

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.22-014, (Released:2022-09-07)

参考文献数

35

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A single specimen (130.0 mm standard length: SL) of Platyberyx mauli Kukuev, Parin and Trunov, 2012, collected at 452–453 m depth off Shizugawa Bay, Miyagi Prefecture, Japan, is the first record of the species from the Pacific Ocean. Previously reported only from the eastern central Atlantic, P. mauli is characterized by the following combination of characters: dorsal-fin rays 28 (28 in present specimen); anal-fin rays 17 (17); pectoral-fin rays 17 or 18 (18); total vertebrae number 33 or 34 (34); head length 30.4–33.9% SL (30.5% SL); body depth 45.6–52.2% SL (46.3% SL); prepectoral length 34.2–35.3% SL (34.2% SL); dorsal-fin base length 75.4–79.1% SL (76.1% SL); ventral caudal spur absent; procurrent rays cylindrical; gill rakers stout, rounded, with many small bristles, especially near tip and midway along each raker; jaw teeth in multiple rows anteriorly; posterior margin of upper jaw extending nearly to posterior margin of orbit; dorsal pharyngeal papillae multifid; conspicuous multifid papillae throughout inside of mouth cavity. The new standard Japanese name “Shamoji-yaegisu” is proposed for the species. Additionally, a single specimen (176.9 mm SL) of Platyberyx andriashevi (Kukuev, Parin and Trunov, 2012), collected off the Pacific coast of Hokkaido, represents the first record of the species from that region. A key to the six species of Caristiidae currently known from Japan is provided.

著者

三澤 遼 鈴木 勇人 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.21-036, (Released:2022-02-08)

参考文献数

20

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The rarely collected ceratioid anglerfish family Caulophrynidae, including the genera Caulophryne Goode and Bean, 1896 and Robia Pietsch, 1979, is widely distributed from the surface to the bathypelagic zone in the Pacific, Atlantic and Indian oceans. Valid Caulophryne species, characterized by the absence of an expanded escal bulb, presence of only 2 pectoral radials, extremely long dorsal- and anal-fin rays, 8 caudal-fin rays, neuromasts of the acoustic-lateralis system located at the tips of elongate filaments, an illicial length less than 130% of standard length (SL), 14–22 dorsal-fin rays, and 12–19 anal-fin rays, include Caulophryne jordani Goode and Bean, 1896 and Caulophryne pelagica (Brauer, 1902) from all three oceans, Caulophryne polynema Regan, 1930 from the Atlantic and eastern Pacific, and Caulophryne bacescui Mihai-Bardan, 1982 from the eastern Pacific. A single female specimen of C. polynema, collected over a bottom depth of 658–663 m off Iwate Pref., Pacific coast of northern Japan, on 9 October 2020, was distinguished from other congeners by the following combination of characters: illicium length 17.3% SL, with about 50 translucent filaments along its entirety; 19 dorsal- and 17 anal-fin rays. In addition, a parasitic male with degenerated dorsal, anal and pectoral fins, and eyes was found on the specimen. The specimen represents the first record of Caulophryne polynema from the western North Pacific, including Japanese waters, and northernmost record of the species in the Pacific Ocean. The new standard Japanese name “Fusafusa-hirenaga-chochin-anko” is proposed for the species.

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

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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.

著者

三澤 遼 鈴木 勇人 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.23-006, (Released:2023-07-10)

参考文献数

28

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The ceratoid anglerfish genus Dolopichthys Garman, 1899, distributed in the bathypelagic zone of all three major oceans, is characterized by the following combination of characters: females with well-developed sphenotic spines; body relatively long and slender, not globular; pectoral-fin lobe short, shorter than the longest pectoral-fin rays; skin naked and entirely smooth; lower jaw with a well-developed symphysial spine; pterygiophore emerging on the snout from between the frontal bones; caudal peduncle depth less than 20% of standard length (SL); quadrate spine well developed; frontal bones long and straight; hyomandibula with a double head. The genus includes seven valid species, Dolopichthys allector Garman, 1899, Dolopichthys danae Regan, 1926, Dolopichthys longicornis Parr, 1927, Dolopichthys jubatus Regan and Trewavas, 1932, Dolopichthys pullatus Regan and Trewavas, 1932, Dolopichthys dinema Pietsch, 1972, and Dolopichthys karsteni Leipertz and Pietsch, 1987, with only D. longicornis being known from Japanese waters to date. A single female specimen (88.6 mm SL) of the rare species D. danae, was collected at a bottom depth of 902–917 m off Iwate Pref., Pacific coast of northern Japan, on 12 October 2022. The specimen was distinguished from other congeners by a longer illicium (length 70% SL), dorsal midline of the escal bulb with two darkly pigmented, distally bifurcating papillae, vomer without teeth, and lower jaw with ca. 150 teeth. Dolopichthys danae was previously known from six specimens only, all from the North Atlantic (south of 40˚N), the present specimen therefore representing the seventhknown specimen and first record of the species from the Indo-Pacific, including Japanese waters. The new standard Japanese name “Enaga-mimizuku-rakuda-anko” is proposed for the species.