A new species of stonefish, Synanceia quinque (Synanceiidae) is described on the basis of two specimens (61.5–84.4 mm standard length) collected off Sabah (Borneo), Malaysia and Flores, Indonesia. The new species is characterized by 12 pectoral-fin rays, and is most similar to Synanceia alula Eschmeyer and Rama-Rao 1973 (11 pectoral-fin rays in the latter vs. 14 or more in other congeners). Other characters distinguishing S. quinque from S. alula include numbers of pelvic-fin rays [I, 5 in the former vs. I, 3 or 4 (usually I, 4) in the latter], gill rakers (0 + 4 or 5 vs. 0 or 1 + 7), and five preopercular spines/skin flaps (upper three spines relatively well developed, lower two rudimentary) (vs. four preopercle spines, fifth spine or skin flap absent). An updated key to species of Synanceia is provided.
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We are very grateful to A. Suzumoto and L. O'Hara (BPBM) for a specimen loan and photograph of the new species; G. Ogihara (formerly KAUM) for providing data from his preliminary taxonomic study on Synanceia; and J. Sparks (AMNH), M. Sabaj Pérez (ANSP), J. Maclaine (BMNH), D. Catania (CAS), M. van Oijen (formerly RMNH), J. Williams (formerly USNM), and P. Bartsch (ZMB) for providing opportunities to examine specimens. We are also indebted to Y. Yashima (KUN) for taking X-ray photographs, and G. Hardy (Ngunguru, New Zealand) for reading the manuscript and providing help with English. This study was supported in part by JSPS KAKENHI Grant Numbers 20H03311 and 21H03651, the JSPS Core-to-core CREPSUM JPJSCCB2020009, and the “Establishment of Glocal Research and Education Network in the Amami Islands” project of Kagoshima University adopted by the Ministry of Education, Culture, Sports, Science and Technology, Japan. This collaborative research was conducted under MoUs between Universiti Malaysia Sabah and Kindai and Kagoshima universities.
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Matsunuma, M., Manjaji-Matsumoto, B.M. & Motomura, H. Synanceia quinque, a new species of stonefish (Synanceiidae) from Borneo and Flores. Ichthyol Res (2021). https://doi.org/10.1007/s10228-021-00829-y
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