Rhabdamia novaluna, a new species of cardinalfish (Perciformes: Apogonidae) from the western Pacific Ocean, with comments on the synonymy of Rhabdamia gracilis

Abstract

The new cardinalfish Rhabdamia novaluna sp. nov. (Apogonidae) is described on the basis of 79 specimens collected from the western Pacific Ocean. The new species is most similar to the Indo-West Pacific species Rhabdamia gracilis (Bleeker 1856) in having VI-I, 9 dorsal-fin rays, II, 12 anal-fin rays and 13 pectoral-fin rays, and lacking blackish blotches on the opercle and anterior portion of the body. However, the former can be distinguished from R. gracilis by having 26–31 (modally 28–29) developed gill rakers, 27–31 (modally 28) total gill rakers (including rudiments), body depth at second dorsal-fin origin 25.5–33.1% of SL (mean 30.2%) and a subdermal black blotch or spot on the lower caudal peduncle. Three nominal species, Apogonichthys nudus Regan 1905, Apogonichthys mentalis Evermann and Seale 1907 and Rhabdamia clupeiformis Weber 1909, are regarded as junior synonyms of R. gracilis. A key to species of Rhabdamia is provided.

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Acknowledgements

We are deeply grateful to M. McGrouther, A. Hay and S. Reader (AMS), M. Sabaj (ANSP), O. Crimmen and J. Maclaine (BMNH), A. Suzumoto (BPBM), T. Iwamoto, D. Catania and M. Hong (CAS), H. Senou (KPM), K. Koeda (NMMB), R. de Ruiter (RMNH), T. Yoshino (Okinawa Churashima Foundation), R. Bills and O. Gon (SAIAB), A. Bosman (SAM), J. Williams (USNM), and S. Morrison, G. Moore and M. Allen (WAM) for opportunities to examine specimens of Rhabdamia. We also thank Y. Haraguchi and other volunteers and students of KAUM for curatorial assistance, G. Moore (WAM) for the donation of WAM specimens to KAUM, and G. Hardy (Ngunguru, New Zealand) for reading the manuscript and providing help with English. This study was supported in part by the Sasakawa Scientific Research Grant from the Japan Science Society (29-747), Grants-in-Aid for Scientific, JSPS KAKENHI Grant Numbers JP26241027, JP24370041, JP23580259 and JP26450265; the JSPS Core-to-Core Program: B Asia–Africa Science Platforms; the “Biological Properties of Biodiversity Hotspots in Japan” project of the National Museum of Nature and Science, Tsukuba, Japan; “Establishment of Research and Education Network on Biodiversity and Its Conservation in the Satsunan Islands” project of Kagoshima University adopted by the Ministry of Education, Culture, Sports, Science and Technology, Japan; and the “Island Research” project of Kagoshima University. This study was conducted under a Memorandum of Agreement for joint research made by and among the Department of Agriculture of the Republic of the Philippines (DA), the University of the Philippines Visayas (UPV), the Kagoshima University Museum, the Research Institute for Humanity and Nature, and Tokai University, facilitated by S. L. Sanchez [Bureau of Fisheries and Aquatic Resources (BFAR), DA]. P. J. Alcala (DA) provided a Prior Informed Consent Certificate, and I. P. Cabacaba and S. M. S. Nolasco (BFAR, DA) provided a fish specimen Export Certificate (No. 2016-39812). We thank the staff of the Office of the Vice-Chancellor for Research and Extension, UPV, and UPV Museum of Natural Sciences, College of Fisheries, UPV, including R. P. Babaran, S. S. Garibay, U. B. Alama, V. G. Urbina, L. H. Mooc, C. J. N. Rubido, E. P. Abunal, A. M. T. Guzman, R. S. Cruz, A. C. Gaje and R. F. M. Traifalgar, and graduate students of the College of Fisheries, UPV, for their support of this research collaboration.

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Correspondence to Tomohiro Yoshida.

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This article was registered in the Official Register of Zoological Nomenclature (ZooBank) as A2613F51-4512-4EC1-A4DA-EB778F892063.

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Yoshida, T., Mabuchi, K. & Motomura, H. Rhabdamia novaluna, a new species of cardinalfish (Perciformes: Apogonidae) from the western Pacific Ocean, with comments on the synonymy of Rhabdamia gracilis. Ichthyol Res 66, 129–139 (2019). https://doi.org/10.1007/s10228-018-0664-1

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Keywords

  • Taxonomy
  • Apogonichthys nudus
  • Apogonichthys mentalis
  • Rhabdamia clupeiformis
  • Rhabdamia gracilis