{"title":"深海橡子虫 Quatuoralisia malakhovi(半知虫纲:Enteropneusta)的新产地","authors":"Hiroshi Kajihara, Jamael Abato, Maho Matsushita","doi":"10.1134/s1063074023060111","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The torquaratorid enteropneust <i>Quatuoralisia malakhovi</i> Ezhova et Lukinykh in Ezhova, Lukinykh, Galkin, Krylova, et Gebruk, 2022 has been known only by the type material from the bathyal zone at depths of 1957–2289 m on the slopes of the submarine Piip Volcano in the Volcanologists Massif, southwestern Bering Sea. In this study, fragments of soft-bodied animals were obtained among trawled material from the bathyal zone in the Japan Trench, about 41.51° N, 144.13° E, at depths of 1987–2007 m during the cruise KH-22-8 of the R/V <i>Hakuho-maru</i> in October 2022. Partial sequences of the mitochondrial 16S rRNA gene from two fragments showed a 100% match with the ones determined from the type series of <i>Q</i>. <i>malakhovi</i>, suggesting conspecificity among them. This study broadens the known geographic distribution range of <i>Q. malakhovi</i> by ~2500 km southwestward. This is also the first record of the species as well as the family Torquaratoridae from Japanese waters. In total, the <i>Hakuho-maru</i> cruise KH-22-8 yielded four species of acorn worms in the Japan Trench (all represented by body fragments), including <i>Q</i>. <i>malakhovi</i> and two unidentified species in the family Harrimaniidae (briefly reported in this paper, about 40.80° N, 144.51° E, 6800 m, and 40.70° N, 144.68° E, 7000 m) in addition to <i>Stereobalanus</i> sp. (previously reported in another paper, about 40.80° N, 144.65° E, 7400 m). The phylogenetic positions of the two unidentified harrimaniids are inferred based on partial sequences of the 16S rRNA gene.</p>","PeriodicalId":49584,"journal":{"name":"Russian Journal of Marine Biology","volume":null,"pages":null},"PeriodicalIF":0.5000,"publicationDate":"2024-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"New Locality for the Deep-Sea Acorn Worm Quatuoralisia malakhovi (Hemichordata: Enteropneusta)\",\"authors\":\"Hiroshi Kajihara, Jamael Abato, Maho Matsushita\",\"doi\":\"10.1134/s1063074023060111\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<h3 data-test=\\\"abstract-sub-heading\\\">Abstract</h3><p>The torquaratorid enteropneust <i>Quatuoralisia malakhovi</i> Ezhova et Lukinykh in Ezhova, Lukinykh, Galkin, Krylova, et Gebruk, 2022 has been known only by the type material from the bathyal zone at depths of 1957–2289 m on the slopes of the submarine Piip Volcano in the Volcanologists Massif, southwestern Bering Sea. In this study, fragments of soft-bodied animals were obtained among trawled material from the bathyal zone in the Japan Trench, about 41.51° N, 144.13° E, at depths of 1987–2007 m during the cruise KH-22-8 of the R/V <i>Hakuho-maru</i> in October 2022. Partial sequences of the mitochondrial 16S rRNA gene from two fragments showed a 100% match with the ones determined from the type series of <i>Q</i>. <i>malakhovi</i>, suggesting conspecificity among them. This study broadens the known geographic distribution range of <i>Q. malakhovi</i> by ~2500 km southwestward. This is also the first record of the species as well as the family Torquaratoridae from Japanese waters. In total, the <i>Hakuho-maru</i> cruise KH-22-8 yielded four species of acorn worms in the Japan Trench (all represented by body fragments), including <i>Q</i>. <i>malakhovi</i> and two unidentified species in the family Harrimaniidae (briefly reported in this paper, about 40.80° N, 144.51° E, 6800 m, and 40.70° N, 144.68° E, 7000 m) in addition to <i>Stereobalanus</i> sp. (previously reported in another paper, about 40.80° N, 144.65° E, 7400 m). The phylogenetic positions of the two unidentified harrimaniids are inferred based on partial sequences of the 16S rRNA gene.</p>\",\"PeriodicalId\":49584,\"journal\":{\"name\":\"Russian Journal of Marine Biology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.5000,\"publicationDate\":\"2024-01-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Russian Journal of Marine Biology\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://doi.org/10.1134/s1063074023060111\",\"RegionNum\":4,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"MARINE & FRESHWATER BIOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Journal of Marine Biology","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1134/s1063074023060111","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MARINE & FRESHWATER BIOLOGY","Score":null,"Total":0}
New Locality for the Deep-Sea Acorn Worm Quatuoralisia malakhovi (Hemichordata: Enteropneusta)
Abstract
The torquaratorid enteropneust Quatuoralisia malakhovi Ezhova et Lukinykh in Ezhova, Lukinykh, Galkin, Krylova, et Gebruk, 2022 has been known only by the type material from the bathyal zone at depths of 1957–2289 m on the slopes of the submarine Piip Volcano in the Volcanologists Massif, southwestern Bering Sea. In this study, fragments of soft-bodied animals were obtained among trawled material from the bathyal zone in the Japan Trench, about 41.51° N, 144.13° E, at depths of 1987–2007 m during the cruise KH-22-8 of the R/V Hakuho-maru in October 2022. Partial sequences of the mitochondrial 16S rRNA gene from two fragments showed a 100% match with the ones determined from the type series of Q. malakhovi, suggesting conspecificity among them. This study broadens the known geographic distribution range of Q. malakhovi by ~2500 km southwestward. This is also the first record of the species as well as the family Torquaratoridae from Japanese waters. In total, the Hakuho-maru cruise KH-22-8 yielded four species of acorn worms in the Japan Trench (all represented by body fragments), including Q. malakhovi and two unidentified species in the family Harrimaniidae (briefly reported in this paper, about 40.80° N, 144.51° E, 6800 m, and 40.70° N, 144.68° E, 7000 m) in addition to Stereobalanus sp. (previously reported in another paper, about 40.80° N, 144.65° E, 7400 m). The phylogenetic positions of the two unidentified harrimaniids are inferred based on partial sequences of the 16S rRNA gene.
期刊介绍:
The Russian Journal of Marine Biology was founded in 1975 by Alexey V. Zhirmunsky, member of the Russian Academy of Sciences. The Russian Journal of Marine Biology covers a wide range of research and some applied aspects of marine biology as a synthetic science related to various fields of study on marine biota and environment. It presents fundamental research on biological processes at molecular, cellular, organismal, and populational levels in marine organisms. Consideration is given to marine objects as models in life sciences. The journal also publishes papers dedicated to events in Russian and international marine biological science and the history of biology.