Abstract
Recent investigations of bottom-trawl bycatch around Dongsha Atoll, Taiwan, South China Sea have yielded numerous new records and undescribed fish species. Among the specimens collected, an unexpectedly large number of the Indian barracudina, Magnisudis indica (Ege, 1953), were obtained. Among its congeners in the family, M. indica is readily distinguishable by possessing the lowest number of total vertebrae (60–62). The adults of this species were extremely rare and by using these new adult materials we document intraspecific morphological variation in this species. Moreover, all examined specimens exhibit a strongly reduced or absent dentition on the jaws, gill rakers, and pharyngeal arches. This reduction of dentition reported here for M. indica may represent an ontogenetic condition in adults.
References
- Dollo, L. (1908) Notolepis coatsi, poisson pélagique nouveau recueilli par l’Expédition Antarctique Nationale Ecossaise. Note préliminaire. Proceedings of the Royal Society of Edinburgh, 28 (pt.1, 5), 58–65. https://doi.org/10.1017/s0370164600011561
- Ege, V. (1953) Paralepididae I (Paralepis and Lestidium). Taxonomy, ontogeny, phylogeny and distribution. Dana Report, 40, 1–184.
- Fricke, R., Kulbicki, M. & Wantiez, L. (2011) Checklist of the fishes of New Caledonia, and their distribution in the Southwest Pacific Ocean (Pisces). Stuttgarter Beiträge zur Naturkunde A, Neue Serie, 4, 341–463.
- Ho, H.-C. & Duhamel, G. (2019) A new species of the fish genus Arctozenus from the Kerguelen Islands, with comments on the lost teeth in adults (Aulopiformes: Paralepididae). Zootaxa, 4651 (3), 497–512. https://doi.org/10.11646/zootaxa.4651.3.5
- Ho, H.-C. & Golani, D. (2019) A new species of Lestrolepis from the Red Sea, with redescription of Lestrolepis pofi (Harry, 1953) (Aulopiformes: Paralepididae). Zootaxa, 4619 (3), 571–579. https://doi.org/10.11646/zootaxa.4619.3.10
- Ho, H.-C. & Lin, C.-H. (2022) Redescription of Lophiodes lugubris (Alcock, 1894), with the largest record of Lophiodes triradiatus (Lloyd, 1909) from the South China Sea (Lophiiformes: Lophiidae). Zootaxa, 5189 (1), 138–145. https://doi.org/10.11646/zootaxa.5189.1.16
- Ho, H.-C. & Lin, T.-Y. (2023) Adult morphology and redescription of Lestidiops indopacificus (Ege, 1953), with comments on the features of related species (Teleostei, Aulopiformes, Paralepididae). ZooKeys, 1160, 109–124. https://doi.org/10.3897/zookeys.1160.103110
- Ho, H.-C., Oktaviyani, S., Peristiwady, T. & Tan, H.H. (2021) A rare species of scaled barracudina (Paralepididae) newly collected from the eastern Indian Ocean off Indonesia. Raffles Bulletin of Zoology, Supplement 36, 486–490. https://doi.org/10.26107/RBZ-2021-0049
- Ho, H.-C., Tsai, S.-Y. & Li, H.-H. (2019) The barracudina genera Lestidium and Lestrolepis of Taiwan, with descriptions of two new species (Aulopiformes: Paralepididae). Zootaxa, 4702 (1), 114–139. https://doi.org/10.11646/zootaxa.4702.1.16
- Ho, H.-C., Su, Y., Lin, C.-H. & Chu, T.-W. (2023) Record of the Amarsipa fish (Family Amarsipidae) from Pratas Island, South China Sea. Zootaxa, 5380 (3), 289–294. https://doi.org/10.11646/zootaxa.5380.3.6
- Krøyer, H.N. (1868) To nye fiske fo den danske fauna. Tidsskrift for fiskeri / udgivet af H. V. Fiedler og Arthur Ferrersen, 2, 70–71.
- Lin, C.-H. & Chang, C.-W. (2012) Otolith Atlas of Taiwan Fishes. National Museum of Marine Biology and Aquarium, Pingtung, 400 pp.
- Lin, Y.-T., Chang, C.-H., Han, Y.-S. & Lin, C.-H. (2025) Revision of Armoreye dory genus Zenion (Zeiformes: Zeniontidae) in the South China Sea, with descriptions of a new species. Journal of Fish Biology. https://doi.org/10.1111/jfb.70202
- Lin, C.-H., Lin, J.-S., Chen, K.-S., Chen, M.-H., Chen, C.-Y. & Chang, C.-W. (2020) Feeding habits of bigeye tuna (Thunnus obesus) in the western Indian Ocean reveal a size-related shift in its fine-scale piscivorous diet. Frontiers in Marine Science, 7, 582571. https://doi.org/10.3389/fmars.2020.582571
- Mediodia, D.P., Chang, C.-H., Ho, H.-C., Přikryl, T. & Lin, C.-H. (2024) A new cryptic species of splitfin fish from Taiwan with revision of the genus Synagrops (Acropomatiformes: Synagropidae). Zoological Studies, 63, 20.
- Ng, S.-L., Liu, H.-W., Mediodia, D.P., Lin, Y.-T., Lee, C.-H., Lin, C.-F., Huang, S.-P., Wu, S.-M., Tung, C.-R., Ho, H.-C. & Lin, C.-H. (2024) An updated checklist of fishes of Dongsha Island, Taiwan, northern South China Sea. ZooKeys, 1220, 175–242. https://doi.org/10.3897/zookeys.1220.131100
- Okamura, O. & Machida, Y. (1986) Additional records of fishes from Kochi Prefecture, Japan. Memoirs of the Faculty of Science, Kochi University, ser. D (Biology), 7, 17–41.
- Ozawa, T. (1988) Paralepididae. In: Okiyama, M. (Ed.), An atlas of the early stage fishes in Japan. Tokai University Press, pp. 235–250.
- Post, A. (1978) Beschreibung zweier Notolepisarten, N. coatsi Dollo, 1908 und N. annulata sp. n. aus der Antarktis (Osteichthyes, Myctophiformes, Paralepididae). Archiv für Fischereiwissenschaft, 29 (1–2), 1–22.
- Post, A. (1987) Results of the research cruises of FRV “Walther Herwig” to South America. LXVII. Revision of the subfamily Paralepidinae (Pisces, Aulopiformes, Alepisauroidei, Paralepididae). I. Taxonomy, morphology and geographical distribution. Archiv für Fischereiwissenschaft, 38 (1/2), 75–131.
- Rivaton, J. & Bourret, P. (1999) Les otolithes des poissons de l’Indo-Pacifique. Institut de recherche pour le développement.
- Rofen, R.R. (1963) Diagnoses of new genera and species of alepisauroid fishes of the family Paralepididae. Aquatica, 2, 1–7.
- Smale, M.J., Watson, G. & Hecht, T. (1995) Otolith atlas of southern African marine fishes. J.L.B. Smith Institute of Ichthyology. https://doi.org/10.5962/bhl.title.141860
- Yamakawa, T. (1984) Paralepididae. In: Okamura, O. & Kitajima, T. (Eds.), Fishes of the Okinawa Trough and the adjacent waters. Vol. I. The intensive research of unexploited fishery resources on continental slopes. Japan Fisheries Resource Conservation Association, pp. 167–169.
