Skip to main content Skip to main navigation menu Skip to site footer
Type: Article
Published: 2021-09-06
Page range: 136-142
Abstract views: 818
PDF downloaded: 288

Osteodiscus abyssicola, a new snailfish (Cottoidei: Liparidae) collected off the Pacific coast of northern Japan

Institute of Oceanic Research and Development, Tokai University, 3-20-1 Orido, Shimizu-ku, Shizuoka 424-8610, Japan
Maizuru Fisheries Research Station, Field Science Education and Research Center, Kyoto University, Nagahama, Maizuru, Kyoto 625-0086, Japan.
Laboratory of Marine Biology, Faculty of Science and Technology, Kochi University, 2-5-1 Akebono-cho, Kochi 780-8520, Japan
School of Marine Science and Technology, Tokai University, 3-20-1 Orido, Shimizu-ku, Shizuoka 424-8610, Japan
Pisces Actinopterygii new species Osteodiscus cascadiae Osteodiscus andriashevi Osteodiscus rhepostomias


The snailfish Osteodiscus abyssicola sp. nov. is described from a single specimen collected off the Pacific coast of Hokkaido, northern Japan, at a depth of 4,671–4,744 m. It is distinguished from all currently recognized congeners by the following combination of characters: vertebrae 49; dorsal-fin rays 44; anal-fin rays 39; principal caudal-fin rays 8; pyloric caeca 5; mouth horizontal; teeth on both jaws simple and sharp, without cusps; upper and lower jaw symphyses without diastema; cephalic pore sizes moderate, similar to or slightly larger than nostril; gill slit extending ventrally to 2nd pectoral-fin ray base; pectoral fin notched; mandibular symphysis to center of anus 101.6% head length (HL); posterior edge of pelvic disk to center of anus 15.5% HL; epural 1, reduced; epipleural ribs absent. An emended diagnosis and key to the species of Osteodiscus are provided.



  1. Andriashev, A.P. & Stein, D.L. (1998) Review of the snailfish genus Careproctus (Liparidae, Scorpaeniformes) in Antarctic and adjacent waters. Contributions in Science, Los Angeles, 470, 1–63.
    Chernova, N.V., Stein, D.L. & Andriashev, A.P. (2004) Family Liparidae Scopoli 1777—snailfishes. California Academy of Sciences Annotated Checklists of Fishes, 31, 1–72.
    Chernova, N., Thiel, R. & Eidus, I. (2020) Four new species of Careproctus (Cottoidei: Liparidae) from the deep-water vicinity of the southern Kuril Islands (Western North Pacific). Zootaxa, 4821 (1), 71–87.
    Collett, R. (1879) Fiske fra Nordhavs-Expeditionens sidste Togt, Sommeren 1878. Forhandlinger I Videnskabs-Selskabet i Christiania, 14, 1–106. [for 1878]
    Gerringer, M.E., Linley, T.D., Jamieson, A.J., Goetze, E. & Drazen, J.C. (2017) Pseudoliparis swirei sp. nov.: a newly-discovered hadal snailfish (Scorpaeniformes: Liparidae) from the Mariana Trench. Zootaxa, 4358 (1), 161–177.
    Kai, Y., Murasaki, K., Misawa, R., Fukui, A., Morikawa, E. & Narimatsu, Y. (2020) A new species of snailfish of the genus Paraliparis (Liparidae) from the western North Pacific, with a redescription of the poorly known species Paraliparis mandibularis. ZooKeys, 968, 143–159.
    Kido, K. (1988) Phylogeny of the family Liparididae, with the taxonomy of the species found around Japan. Memoirs of the Faculty of Fisheries, Hokkaido University, 35, 125–256.
    Krøyer, H.N. (1862) Nogle Bidrag til Nordisk ichthyologi. Naturhistorisk Tidsskrift, Kjøbenhavn, Series 3, 1, 233–310.
    Murasaki, K., Kai, Y., Endo, H. & Fukui, A. (2021) First Japanese record of the snailfish Osteodiscus andriashevi (Liparidae), collected off Iwate, Japan. Japanese Journal of Ichthyology. [10 May 2021, online first, in Japanese]
    Murasaki, K., Takami, M. & Fukui, A. (2019) Paraliparis variabilidens, a new snailfish (Liparidae) from the Suruga Trough, Japan. Ichthyological Research, 66, 509–514.
    Nelson, J.S., Grande, T.C. & Wilson, M.V.H. (2016) Fishes of the world. 5th Edition. John Wiley and Sons, Hoboken, New Jersey, xli + 707 pp.
    Orr, J.W. (2016) Two new species of snailfishes of the genus Careproctus (Liparidae) from the Aleutian Islands, Alaska. Copeia, 104, 890–896.
    Orr, J.W., Spies, I., Stevenson, D.E., Longo, G.C., Kai, Y., Ghods, S. & Hollowed, M. (2019) Molecular phylogenetics of snailfishes (Liparidae: Cottoidei) based on mtDNA and RADseq genomic analyses, with comments on selected morphological characters. Zootaxa, 4642 (1), 1–79.
    Pitruk, D.L. & Fedorov, V.V. (1990) A new species of the genus Osteodiscus Stein (Liparididae) from the Sea of Okhotsk. Voprosy Ikhtiologii, 30 (5), 856–860. [in Russian, English translation in Journal of Ichthyology, 30 (8), 112–118]
    Smith, W.L. & Busby, M.S. (2014) Phylogeny and taxonomy of sculpins, sandfishes, and snailfishes (Perciformes: Cottoidei) with comments of the phylogenetic significance of their early-life-history specializations. Molecular Phylogenetics and Evolution, 79, 332–352.
    Stein, D.L. (1978) A review of the deepwater Liparidae (Pisces) from the coast of Oregon and adjacent waters. Occasional Papers of the California Academy of Sciences, 127, 1–55.
    Stein, D.L. (2012) A review of the snailfishes (Liparidae, Scorpaeniformes) of New Zealand, including descriptions of a new genus and sixteen new species. Zootaxa, 3588 (1), 1–54.
    Stein, D.L., Chernova, N.V. & Andriashev, A.P. (2001) Snailfishes (Pisces: Liparidae) of Australia, including descriptions of thirty new species. Records of the Australian Museum, 53, 341–406.
    Stein, D.L., Drazen, J.C., Schlining, K.L., Barry, J.P. & Kuhnz, L. (2006) Snailfishes of the central California coast: video, photographic and morphological observations. Journal of Fish Biology, 69, 970–986.