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Redigobius fotuno, a new limnetic goby from Muna Island, Indonesia (Teleostei: Gobiidae)

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Redigobius fotuno sp. nov., described from a limestone sinkhole on Muna Island, Southeastern Sulawesi, Indonesia, is most similar to Redigobius penango (Popta 1922), endemic to the Sulawesi mainland, both species having a robust body and rounded head, reticular body color pattern, and longitudinal suborbital papillae rows. However, the new species is distinguished from the latter in having greater head length (35.3–38.4% of standard length [SL]), upper jaw length (14.7–20.0% of SL) and predorsal length (43.4–46.0% of SL), and a slender pelvic disc with thin frenum (length: 21.7–26.2% of SL; base width: 4.2–6.3% of SL). These unique morphological characters of R. fotuno sp. nov. may be related to the limnetic habitat of the species.

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We are grateful to Ixchel F. Mandagi (Sam Ratulangi University), Andy B. Nofrianto (Halu Oleo Univ.), Rieko Tanaka (Nagoya Zoo), Ryo Kakioka (Ryukyu Univ.) and Satoshi Ansai (Kyoto Univ.) for kindly assisting our field survey; Helen K. Larson (Museum of Tropical Queensland) for providing information pertaining to the original data from her previous research; and Susanne Dorow, Moritz Sonnewald, Friedhelm Krupp and Renate Rabenstein (SMF), Ilham V. Utama (MZB), and Masanori Nakae and Gento Shinohara (NSMT) for assisting our examination of museum specimens. We also thank Graham S. Hardy (Ngunguru, New Zealand) for revising a draft of the manuscript. We are grateful the Ministry of Research, Technology, and Higher Education, Republic of Indonesia (RISTEKDIKTI) and the Faculty of Fisheries and Marine Science, Sam Ratulangi University, for permission to conduct research in Sulawesi (research permit numbers 107/SIP/FRP/E5/Dit.KI/IV/2018 and 3B/TKPIPA/E5/Dit.KI/III/2019). All experiments were approved by the Animal Care Committee of the University of the Ryukyus (201899). This study was supported by JSPS KAKENHI to HK (19J22686) and KY (17H01675).

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Correspondence to Hirozumi Kobayashi.

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The specimens used in this study were appropriately treated in accordance with Regulations of the Animal Care Committee, University of the Ryukyus (permit number 201899).

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Kobayashi, H., Sumarto, B.K.A., Mokodongan, D.F. et al. Redigobius fotuno, a new limnetic goby from Muna Island, Indonesia (Teleostei: Gobiidae). Ichthyol Res (2024).

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