Abstract
Plectranthias cruentus new species is described from the holotype and two paratypes collected off Ball’s Pyramid and a paratype from Lord Howe Island. It resembles P. pelicieri Randall & Shimizu 1994 in live coloration and most morphological details, including absence of predorsal scales anterior to the supratemporal commissure, but differs in having the fifth or sixth (versus third) dorsal-fin spine longest, at least some pectoral-fin rays branched (versus all unbranched), and inconspicuous (versus distinct) serrations on the interopercle. It also differs in live coloration details.
References
Anderson, W.D. Jr. (2018) Annotated checklist of anthiadine fishes (Percoidei: Serranidae). Zootaxa, 4475 (1), 1–62.
https://doi.org/10.11646/zootaxa.4475.1.1
Anderson, W.D. Jr. & Baldwin, C.C. (2000) A new species of Anthias (Teleostei: Serranidae: Anthiinae) from the Galápagos Islands, with keys to Anthias and eastern Pacific Anthiinae. Proceedings of the Biological Society of Washington, 113, 369–385.
Anderson, W.D. Jr. & Heemstra, P.C. (2012) Review of Atlantic and eastern Pacific anthiine fishes (Teleostei: Perciformes: Serranidae), with descriptions of two new genera. Transactions of the American Philosophical Society, 102 (2), i–xviii + 1–173, figs. 1–32.
Bleeker, P. (1873) Sur les espèces indo-archipélagiques d’Odontanthias et de Pseudopriacanthus. Nederlandsch Tijdschrift voor de Dierkunde, 4, 235–240.
Clark, M.R. & Roberts, C.D. (2008) Fish and invertebrate biodiversity on the Norfolk Ridge and Lord Howe Rise, Tasman Sea (NORFANZ voyage, 2003). NZ Aquatic Environment and Biodiversity Report, 28, 1–131.
Fricke, R., Teitelbaum, A. & Wantiez, L. (2015) Twenty-one new records of fish species (Teleostei) from the New Caledonian EEZ (south-western Pacific Ocean). Marine Biodiversity Records, 8, 1–12.
https://doi.org/10.1017/S1755267215000986
Gill, A.C., Tea, Y.K. & Senou, H. (2016) Plectranthias takasei, new species of anthiadine fish from southern Japan (Teleostei: Serranidae). Zootaxa, 4205 (4), 349–356.
https://doi.org/10.11646/zootaxa.4205.4.3
Heemstra, P.C. (1996) A review of species of the anthiine fish genus Plectranthias (Perciformes: Serranidae) from Mauritius. Transactions of the Royal Society of South Africa, 51, 139–146.
https://doi.org/10.1080/00359199609520604
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.
Hughes, D.R. (1981) Development and organization of the posterior field of ctenoid scales in the Platycephalidae. Copeia, 1981, 596–606.
https://doi.org/10.2307/1444564
Randall, J.E. (1995) Selenanthias myersi, a new species of anthiine fish (Perciformes: Serranidae) from the western Pacific. Cybium, 19, 47–53.
Randall, J.E. (1996) Two new anthiine fishes of the genus Plectranthias (Perciformes: Serranidae), with a key to the species. Micronesica, 29, 113–131.
Randall, J.E. & Hoese, D.F. (1995) Three new species of Australian fishes of the genus Plectranthias (Perciformes: Serranidae: Anthiinae). Records of the Australian Museum, 47, 327–335.
https://doi.org/10.3853/j.0067-1975.47.1995.241
Randall, J.E. & Shimizu, T. (1994) Plectranthias pelicieri, a new anthiine fish (Perciformes: Serranidae) from Mauritius, with notes on P. gardineri. Japanese Journal of Ichthyology, 41, 109–115.
Roberts, C.D. (1993) Comparative morphology of spined scales and their phylogenetic significance in the Teleostei. Bulletin of Marine Science, 52, 60–113.
Senou, H. & Yunokawa, K. (1995) New record of an anthiine fish, Plectranthias pelicieri (Perciformes: Serranidae) form the western Pacific. I.O.P. Diving News, 6 (9), 4–6.
Shepherd, B., Phelps, T., Pinheiro, H.T., Pérez-Matus, A. & Rocha, L.A. (2018) Plectranthias ahiahiata, a new species of perchlet from a mesophotic ecosystem at Rapa Nui (Easter Island) (Teleostei, Serranidae, Anthiadinae). ZooKeys, 762, 105–116.
https://doi.org/10.3897/zookeys.762.24618
Wada, H., Senou, H. & Motomura, H. (2018) Plectranthias maekawa, a new species of perchlet from the Tokara Islands, Kagoshima, Japan, with a review of Japanese records of P. wheeleri (Serranidae: Anthiadinae). Ichthyological Research, 66, 269–279.
https://doi.org/10.1007/s10228-018-0674-z
Wada, H.., Suzuki, T., Senou, H. & Motomura, H. (2020) Plectranthias ryukyuensis, a new species of perchlet from the Ryukyu Islands, Japan, with a key to the Japanese species of Plectranthias (Serranidae: Anthiadinae) Ichthyological Research, 2020. [published online]
https://doi.org/10.1007/s10228-019-00725-6
Williams, A., Gowlett-Holmes, K. & Althaus, F. (2006) Biodiversity survey of seamounts and slopes of the Norfolk Ridge and Lord Howe Rise. Final report to the Department of the Environment and Heritage (National Oceans Office). CSIRO Marine and Atmospheric Research, Hobart, Tasmania, vi + 203 pp, appx. 8