The new snailfish Paraliparis hokuto is described from two specimens collected between 1,432 and 1,562 m depth in the northern part of the Suruga Trough. It can be distinguished from all currently recognized congeners by the following combination of characters: 72 total vertebrae; 65 dorsal-fin rays; 60 or 61 anal-fin rays; 22 or 23 pectoral-fin rays; 6 caudal-fin rays; 3 pectoral proximal radials, all unnotched; 5 pyloric caeca, longest caecum ca. 60% of HL; teeth weak, easily bent or damaged, completely uniserial in lower jaw; paired chin pores in common pit; opercular flap present; uppermost part of pectoral-fin base horizontally level with center or lower margin of eye. A single specimen of the rare snailfish Paraliparis atramentatus Gilbert and Burke 1912, collected from 253 to 1,282 m depth on the continental slope in western Suruga Bay, and representing only the third example of the species and first record from Suruga Bay, is described and intraspecific variability in teeth tip shape noted.
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We are grateful to Captain I. Hashigaya and Chief Engineer H. Sakata of T/V Hokuto for their assistance in the sampling program. Grateful thanks are also given to G. S. Hardy (Ngunguru, New Zealand) for his critical reading of the manuscript, I. Sakamoto (Tokai University) for information on the submarine topography of Suruga Bay, S. Tomiyama (MSM) for depositing the specimens in the Marine Science Museum, Tokai University, J. T. Williams, S. Raredon, D. G. Smith, K. Murphy and D. Pitassy (USNM), and H. Imamura, T. Kawai and M. Yabe (HUMZ) for their kind hospitality during the first author’s visit to examine specimens, S. Raredon (USNM) for specimen photographs and radiographs, and H. Endo (BSKU) for a specimen loan. This study was supported in part by Grants-in-Aid for the Promotion of Scientific Research (C) (nos. 25450280 and 18K05792) from the Ministry of Education, Culture, Sports, Science and Technology, Japan, to the third author.
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Murasaki, K., Takami, M. & Fukui, A. Paraliparis hokuto, a new snailfish (Cottoidei: Liparidae) from Suruga Bay, Japan, and a new record of the rare species Paraliparis atramentatus Gilbert and Burke 1912. Ichthyol Res 67, 167–175 (2020). https://doi.org/10.1007/s10228-019-00717-6
- New species
- Paraliparis rosaceus
- Intraspecific variation
- Teeth shape