Abstract
Specimens of Devario from a tributary to the Salween River in Myanmar initially identified as Devario browni but with a different colour pattern, were subjected to a comparative morphological analysis with syntypes and other specimens of D. browni from near its putative type locality. The Salween sample was recognised as representing a distinct species, here named Devario ahlanderi. No significant morphometric differences were found between D. ahlanderi and D. browni. The type series of Devario ahlanderi differed from D. browni and most other species of Devario in the presence of 14 vs 12 circumpeduncular scale rows. Devario ahlanderi, D. browni, and D. fangae shared subadult colour pattern. Adult D. ahlanderi differed from adult D. browni in the trunk colour pattern, consisting of rows of dark blotches or short vertical bars. In D. browni, the flank colour pattern consisted of horizontal dark stripes, the middle of which (the P stripe) frequently diverged anteriorly, enclosing a small light blotch. Specimens previously reported as D. browni from the upper Salween River basin in Yunnan differed slightly in colour pattern, and may represent a distinct species. Devario ahlanderi shared spotted colour pattern with that of one ontogenetic state in D. kysonensis, except that a row of spots marking the P-1 stripe in D. kysonensis was absent in D. ahlanderi. The minimum genetic distance between D. ahlanderi and congeneric species varied from 2.1 to 5% in the mt-coI gene.
References
Barman, R.P. (1991) A taxonomic revision of the Indo-Burmese species of Danio Hamilton Buchanan (Pisces: Cyprinidae). Records of the Zoological Survey of India. Occasional Paper, 137, 1–91.
Chaudhuri, B.L. (1911) Contributions to the fauna of Yunnan based on collections made by J. Coggin Brown, B.Sc., 1909–1910. Part II. Fishes. Records of the Indian Museum, 6 (1), 13–24.
Chu, X.-L. (1981) A preliminary revision of fishes of the genus Danio from China. Zoological Research, 2 (2), 145–156. [in Chinese]
Conway, K.W., Mayden, R.L. & Tang, K.L. (2009 Devario anomalus, a new species of freshwater fish from Bangladesh. Zootaxa, 2136 (1), 49–58.
https://doi.org/10.11646/zootaxa.2136.1.4
Cottle, P.W. (2010) Danios and Devarios. Peter W. Cottle, Rochester, vii + 124 pp.
Fang, F. (1997) Redescription of Danio kakhienensis, a poorly known cyprinid fish from the Irrawaddy basin. Ichthyological Exploration of Freshwaters,7, 289–298.
Fang, F. (1998) Danio kyathit, a new species of cyprinid fish from Myitkyina, northern Myanmar. Ichthyological Exploration of Freshwaters, 8, 273–280.
Fang, F. (2000) A review of Chinese Danio species (Teleostei: Cyprinidae). Acta Zootaxonomica Sinica, 25, 214–227.
Fang, F. & Kottelat, M. (1999) Danio species from northern Laos, with descriptions of three new species (Teleostei: Cyprinidae). Ichthyological Exploration of Freshwaters, 10, 281–295.
Fang, F. & Kullander, S.O. (2009) Devario xyrops, a new species of danionine fish from south-western Myanmar (Teleostei: Cyprinidae). Zootaxa, 2164 (1), 33–40. https://doi.org/10.11646/zootaxa.2164.1.3
Hora, S.L. (1929) Notes on fishes in the Indian Museum XVII. Loaches of the genus Nemachilus from Burma. Records of the Indian Museum, 31 (4), 311–334.
Hora, S.L. & Mukerji, D.D (1934) Notes on fishes in the Indian Museum. XII. On a collection of fish from the S. Shan States and the Pegu Yomas, Burma. Records of the Indian Museum, 36, 123–138.
International Commission on Zoological Nomenclature (1999) International Code of Zoological Nomenclature. Fourth Edition. International Trust for Zoological Nomenclature, London, xxix + 306 pp.
Kottelat, M. (2000) Notes on the taxonomy, nomenclature and distribution of some fishes of Laos. Journal of South Asian Natural History, 5, 83–90.
Kottelat, M. (2012) Conspectus cobitidum, an inventory of the loaches of the world (Teleostei: Cypriniformes: Cobitoidei). Raffles Bulletin of Zoology, Supplement 26, 1–199.
Kottelat, M. (2013) The fishes of the inland waters of Southeast Asia: a catalogue and core bibliography of the fishes known to occur in freshwaters, mangroves and estuaries. Raffles Bulletin of Zoology, Supplement 27, 1–663.
Kottelat, M. (2020) Redescription of Devario kysonensis and first record from Laos (Teleostei: Cyprinidae). Raffles Bulletin of Zoology, 68, 556–561. https://doi.org/10.26107/RBZ-2020-0071
Kottelat, M. (2021) Devario pullatus and D. subviridis, two new species of minnows from Laos (Teleostei; Cyprinidae). Ichthyological Exploration of Freshwaters, 30, 271–288. https://doi.org/10.23788/IEF-1143
Kuang, P. (1989). Danioninae. In: Chu, X. & Chen,Y. (Eds.), The fishes of Yunnan, China. Part I. Cyprinidae. Science Press, Beijing, pp. 11–36. [in Chinese]
Kullander, F.F. (2001) Phylogeny and species diversity of the South and Southeast Asian cyprinid genus Danio Hamilton (Teleostei, Cyprinidae). Department of Zoology, Stockholm University, Stockholm, 26 pp. [PhD dissertation]
Kullander, S.O. (2017) Devario fangae and Devario myitkyinae, two new species of danionin cyprinids from northern Myanmar (Teleostei: Cyprinidae: Danioninae). Zootaxa, 4227 (3), 407–421. https://doi.org/10.11646/zootaxa.4227.3.7
Kullander, S.O., Rahman, M.M., Norén, M. & Mollah, A.R. (2017) Devario in Bangladesh: Species diversity, sibling species, and introgression within danionin cyprinids (Teleostei: Cyprinidae: Danioninae). PloS ONE, 12 (11), e0186895. https://doi.org/10.1371/journal.pone.0186895
Menon, A.K.G. & Yazdani, G.M. (1963) Catalogue of type-specimens in the Zoological Survey of India. Part 2—Fishes. Records of the Zoological Survey of India, 61 (1–2), 91–190.
Mukerji, D.D. (1934) Report on Burmese fishes collected by L.T.Col. R.W. Burton from the tributary streams of the Mali Hka River of the Myitkyina District (Upper Burma), Part II. Journal of the Bombay Natural History Society, 36, 39–80.
Northern Mine Research Society. (1963) Obituaries of members of the Institution of Mining and Metallurgy. Available from https://www.nmrs.org.uk/resources/obituaries-of-members/b/john-coggin-brown/ (accessed 26 May 2021)
Pramod, P.K., Fang, F., Rema Devi, K., Liao, T.Y., Indra, T.J., Jameela Beevi, K.S. & Kullander, S.O. (2010) Betadevario ramachandrani, a new danionine genus and species from the Western Ghats of India (Teleostei: Cyprinidae: Danioninae). Zootaxa, 2519 (1), 31–47. https://doi.org/10.11646/zootaxa.2519.1.2
Regan, C.T. (1907) Description of a new cyprinid fish of the genus Danio from Upper Burma. Records of the Indian Museum, 4, 395.
Sudasinghe, H., Pethiyagoda, R. & Meegaskumbura, M. (2020) Evolution of Sri Lanka’s Giant Danios (Teleostei: Cyprinidae: Devario): Teasing apart species in a recent diversification. Molecular Phylogenetics and Evolution, 106853, 1–15. https://doi.org/10.1016/j.ympev.2020.106853
Systat. (2009) Systat. Version 13. Systat software, San Jose. [program]
Tang, K.L., Agnew, M.K., Hirt, V., Sado, T., Schneider, L.M., Freyhof, J., Sulaiman, Z., Swartz, E., Vidthayanon, C., Miya, M., Saitoh, K., Simons, A.M., Wood, R.M. & Mayden, R.L. (2010) Systematics of the subfamily Danioninae (Teleostei: Cypriniformes: (Cyprinidae). Molecular Phylogenetics and Evolution, 57, 189–214. https://doi.org/10.1016/j.ympev.2010.05.021
Yang, G.R. & Huang, H.J. (1964) The Leuciscinae. In: Wu, H. (Ed.), The cyprinid fishes of China. Vol. 1. Technical Printing House, Shanghai, pp.1–61. [in Chinese]