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Issue: Vol. 5604 No. 1: 12 Mar. 2025
Type: Article
Published: 2025-03-12
DOI: 10.11646/zootaxa.5604.1.4
Page range: 41-51
Abstract views: 100
PDF downloaded: 4

First confirmed record of adult Pacific squaretail, Tetragonurus pacificus (Teleostei: Perciformes: Stromateoidei) from the Indian Ocean, with an expanded description

National Aquatic Resources Research and Development Agency (NARA); Crow Island; Colombo 15; Sri Lanka.
National Aquatic Resources Research and Development Agency (NARA); Crow Island; Colombo 15; Sri Lanka.; Department of Fisheries and Marine Sciences; Faculty of Fisheries and Ocean Sciences; Ocean University of Sri Lanka; Mahawela Road; Tangalle; 82200; Sri Lanka.; Department of Chemical Engineering; Brunel University London; Uxbridge UB8 3PH; UK.
National Aquatic Resources Research and Development Agency (NARA); Crow Island; Colombo 15; Sri Lanka.; Department of Fisheries and Marine Sciences; Faculty of Fisheries and Ocean Sciences; Ocean University of Sri Lanka; Mahawela Road; Tangalle; 82200; Sri Lanka.
National Aquatic Resources Research and Development Agency (NARA); Crow Island; Colombo 15; Sri Lanka.; Department of Fisheries and Marine Sciences; Faculty of Fisheries and Ocean Sciences; Ocean University of Sri Lanka; Mahawela Road; Tangalle; 82200; Sri Lanka.
National Aquatic Resources Research and Development Agency (NARA); Crow Island; Colombo 15; Sri Lanka.; Department of Fisheries and Marine Sciences; Faculty of Fisheries and Ocean Sciences; Ocean University of Sri Lanka; Mahawela Road; Tangalle; 82200; Sri Lanka.
National Aquatic Resources Research and Development Agency (NARA); Crow Island; Colombo 15; Sri Lanka.
National Aquatic Resources Research and Development Agency (NARA); Crow Island; Colombo 15; Sri Lanka.
National Aquatic Resources Research and Development Agency (NARA); Crow Island; Colombo 15; Sri Lanka.
Iziko Museums of South Africa; Collections & Digitization Department; Cape Town; 8001; South Africa.
Food and Agriculture Organization of the United Nations; Viale delle Terme di Caracalla; 00153 Rome; Italy.; National Research Foundation—South African Institute for Aquatic Biodiversity; Makhanda 6140; South Africa.
Pisces Tetragonuridae taxonomy morphology COI trawl surveys Sri Lanka

Abstract

Three adult individuals (129–133 mm SL) of the rare Pacific squaretail Tetragonurus pacificus Abe were collected during a pelagic trawl by the R/V Dr. Fridtjof Nansen off the coast of Sri Lanka in July 2018. The specimens represent the first confirmed adult records from Sri Lankan waters and the entire Indian Ocean, where previously only early juveniles (9–21 mm SL) were recorded from the region nearly seven decades ago. Taxonomic identification of the specimens was validated through an integrated approach combining morphological and molecular analyses, resulting in an expanded description of T. pacificus and a revision of diagnostic characters used to distinguish it from its congeners. Analysis of the COI gene revealed clear genetic divergence between T. pacificus and its two congeneric species, with pairwise distances of 8.6% from T. cuvieri Risso and 14.3% from T. atlanticus Lowe, offering new insights into the phylogenetic relationships within the genus Tetragonurus. A revised key to the species of Tetragonurus is also provided, informed by the newly available material of T. pacificus.

 

References

  1. Abe, T. (1953) New, rare or uncommon fishes from Japanese waters. II. Records of rare fishes of the families Diretmidae, Luvaridae and Tetragonuridae, with an appendix (description of a new species, Tetragonurus pacificus, from off the Solomon Islands). Japanese Journal of Ichthyology, 3 (1), 39–47.
  2. Ahlstrom, E.H., Butler, J.L. & Sumida, B.Y. (1976) Pelagic stromateoid fishes (Pisces, Perciformes) of the eastern Pacific: kinds, distributions, and early life histories and observations on five of these from the northwest Atlantic. Bulletin of Marine Science, 26 (3), 285–402.
  3. Anderson, M.E. (2022) Family Tetragonuridae. In: Heemstra, P.C., Heemstra, E., Ebert, D.A., Holleman, W. & Randall, J.E. (Eds.), Coastal fishes of the Western Indian Ocean. Vol. 5. South African Institute for Aquatic Biodiversity a National Research Facility of the National Research Foundation (NRF/SAIAB), Makhanda, pp. 307–308.
  4. Grey, M. (1955) The fishes of the genus Tetragonurus Risso. Dana-Report, 41, 1–75. https://doi.org/10.1163/9789004628489
  5. Haedrich, R.L. (1967) The stromateoid fishes: systematics and a classification. Bulletin of the Museum of Comparative Zoology at Harvard College, 135 (2), 31–139.
  6. Haedrich, R.L. (1986) Family No. 256: Tetragonuridae. In: Smith, M.M & Heemstra, P.C. (Eds.), Smiths’s Sea Fishes. Macmillan, Johannesburg, pp. 1189–1191.
  7. Hall, T.A. (1999) BioEdit: a user-friendly biological sequence alignment editor and analysis program for Windows 95/98/NT. Nucleic Acids Symposium Series, 41 (2), 95–98.
  8. Kimura, M. (1980) A simple method for estimating evolutionary rates of base substitutions through comparative studies of nucleotide sequences. Journal of Molecular Evolution, 16 (2), 111–120. https://doi.org/10.1007/BF01731581
  9. Koeda, K. & Teramura, A. (2019) Redescription of Tetragonurus pacificus (Teleostei: Stromateoidei: Tetragonuridae), based on specimens collected from Taiwan and Tarawa Atoll. Zootaxa, 4702 (1), 26–31. https://doi.org/10.11646/zootaxa.4702.1.7
  10. Krakstad, J.O., Jayasinghe, P., Totland, A., Dalpadado, P., Søiland, H., Cervantes, D., Gunasekara, S., Liyanage, U., Haputhantri, S., Arulananthan, K. & Rathnasuriya, I., (2018) Survey of regional resources and ecosystems of the Bay of Bengal. Part 1. Sri Lanka, 24 June–16 July 2018. NORAD-FAO programme GCP/GLO/690/NOR, Cruise reports Dr. FRIDTJOF NANSEN, EAF-Nansen/CR/2018/8. FAO, Rome, 162 pp.
  11. Last, P. (2001) Family Tetragonuridae. In: Carpenter, K.E. & Niem, V.H. (Eds.) Species identification guide for fishery purposes. The living marine resources of the western central Pacific. Bony fishes part 4 (Labridae to Latimeriidae), estuarine crocodiles, sea turtles, sea snakes and marine mammals. FAO, Rome, pp. 3784–3785.
  12. Parin, N.V. & Piotrovsky, A.S. (2004) Stromateoid fishes (suborder Stromateoidei) of the Indian Ocean (species composition, distribution, biology, and fisheries). Journal of Ichthyology, 44 (1), 33–62.
  13. Tamura, K. & Nei, M. (1993) Estimation of the number of nucleotide substitutions in the control region of mitochondrial DNA in humans and chimpanzees. Molecular Biology and Evolution, 10 (3), 512–26. https://doi.org/10.1093/oxfordjournals.molbev.a040023
  14. Tamura, K., Stecher, G. & Kumar, S. (2021) MEGA11: Molecular Evolutionary Genetics Analysis version 11. Molecular Biology and Evolution, 38 (7), 3022–3027. https://doi.org/10.1093/molbev/msab120
  15. Teramura, A., Koeda, K., Matsuo, A., Sato, M.P., Senou, H., Ho, H.C., Suyama, Y., Kikuchi, K. & Hirase, S. (2022) Assessing the effectiveness of DNA barcoding for exploring hidden genetic diversity in deep-sea fishes. Marine Ecology Progress Series, 701, 83–98. https://doi.org/10.3354/meps14193
  16. Thompson, J.D., Gibson, T.J. & Higgins, D.G. (2003) Multiple sequence alignment using ClustalW and ClustalX. Current protocols in Bioinformatics, 1, 2–3. https://doi.org/10.1002/0471250953.bi0203s00
  17. Ward, R.D., Zemlak, T.S. Innes, B.H., Last, P.R. & Hebert, D.N. (2005) DNA barcoding Australia’s fish species. Philosophical Transactions of the Royal Society B Biological Sciences, 360 (1462), 1847–1857. https://doi.org/10.1098/rstb.2005.1716