Abstract
Plectranthias takasei is described from two specimens collected in Izu Oceanic Park, Sagami Bay, Honshu, Japan. It is distinguished from congeners in having the following combination of characters: dorsal rays X,15; no fleshy flaps on dorsal-fin spines; pectoral rays 13, all unbranched; branched caudal-fin rays 8 + 7; lateral line scales 28 (including intermittent and terminal pitted scales); circumpeduncular scales 12; fourth dorsal-fin spine longest; and preopercle without antrorse spines or serrations ventrally, with 2–3 weak serrations or crenulations posteriorly.
References
Ahlstrom, E.H., Butler, J.L. & Sumida, B.Y. (1976) Pelagic stromateoid fishes (Pisces, Perciformes) of the eastern Pacific: kinds, distributions, and early life histories and observations on five of these from the northwest Atlantic. Bulletin of Marine Science, 26, 285–402.
Allen, G.R. & Walsh, F. (2015) Plectranthias bennetti, a new species of anthiine fish (Pisces: Serranidae) from the Coral Sea, Australia. Journal of the Ocean Science Foundation, 16, 82–89.
Bleeker, P. (1871) Atlas ichthyologique des Indes Orientales Néêrlandaises. Gouvernement colonial néêrlandais, volume 7, pls 287–288
Bleeker, P. (1873) Sur les especès indo-archipélagiques d'Odontanthias et de Pseudopriacanthus. Nederlandsch Tijdschrift voor de Dierkunde, 4, 235–240.
Fourmanoir, P. (1977) Description de deux nouvelles espèces d'Anthiinae (famille Serranidae). Cahiers du Pacifique, 20, 267–270.
Gill, A.C. (2004) Revision of the Indo-Pacific dottyback fish subfamily Pseudochrominae (Perciformes: Pseudochromidae). Smithiana Monograph, 1, 1–214, pls 1–12.
Günther, A. (1880) Report on the shore fishes procured during the voyage of H.M.S. Challenger in the years 1873-1876. In: Report on the Scientific Results of the Voyage of H. M. S. Challenger During the Years 1873-76. Zoology, 1 (part 6), 1–82, pls. 1–32.
Heemstra, P.C. & Randall, J.E. (2009) A review of the anthiine fish genus Plectranthias (Perciformes: Serranidae) of the Western Indian Ocean, with description of a new species, and a key to the species. Smithiana Bulletin, 10, 3–17.
Hubbs, C.L. & Lagler, K.F. (1947) Fishes of the Great Lakes Region. Cranbrook Institute of Science, Bulletin, 26, 1–186.
Katayama, M. (1964) A new genus and species of anthinid fish from Sagami Bay, Japan. Bulletin of the Faculty of Education Yamaguchi University, 13, 27–33.
Johnson, G.D. (1975) The procurrent spur: an undescribed perciform caudal character and its phylogenetic implications. Occasional Papers of the California Academy of Sciences, 121, 1–23.
Johnson, G.D. & Patterson, C. (2001) The intermuscular system of acanthomorph fishes: a commentary. American Museum Novitates, 3312, 1–24.
https://doi.org/10.1206/0003-0082(2001)312%3C0001:TISOAF%3E2.0.CO;2Patterson, C. & Johnson, G.D. (1995) The intermuscular bones and ligaments of teleostean fishes. Smithsonian Contributions to Zoology, 559, 1–83, 1 foldout table.
Randall, J.E. (1980) Revision of the fish genus Plectranthias (Serranidae: Anthiinae) with descriptions of 13 new species. Micronesica, 16, 101–187.
Randall, J.E. (1996) Two new anthiine fishes of the genus Plectranthias (Perciformes: Serranidae), with a key to the species. Micronesica, 29, 113–131.
Roberts, C.D. (1993) Comparative morphology of spined scales and their phylogenetic significance in the Teleostei. Bulletin of Marine Science, 52, 60–113.
Smith, J.L.B. (1961) Fishes of the family Anthiidae. Ichthyological Bulletin, Department of Ichthyology, Rhodes University, 21, 359–369.
Williams, J.T., Delrieu-Trottin, E. & Planes, S. (2013) Two new fish species of the subfamily Anthiinae (Perciformes, Serranidae) from the Marquesas. Zootaxa, 3647 (1), 167–180.
https://doi.org/10.11646/zootaxa.3647.1.8Wu, K.-Y., Randall, J.E. & Chen, J.-P. (2011) Two new species of anthiine fishes of the genus Plectranthias (Perciformes: Serranidae) from Taiwan. Zoological Studies, 50, 247–253.