Description of a new loach species, Yunnanilus triangulus sp. nov. (Cypriniformes, Nemacheilidae), from Yunnan, China
Authors/Creators
- 1. Guangxi Normal University, Guilin, China
- 2. Chinese Academy of Sciences, Yunnan, China
Description
A new species of the genus Yunnanilus, designated Yunnanilus triangulus sp. nov., is described from the Nanpan River in Yunnan Province, southwestern China. Nuptial males of this species are distinguished by the presence of tubercles on the caudal peduncle during the reproductive period, a feature not observed in other members of the genus. The new species is further characterized by the following unique combination of morphological characters: body scaled, smaller eyes than interorbital width, nine inner gill rakers on first gill arch, lateral head length 27.1%–30.9% SL, head width 14.3%–17.2% SL, eye diameter 19.6%–23.8% of lateral head length, and caudal peduncle depth 94.0%–130.6% of its length. Morphological and molecular evidence support the validity of this species, despite its geographic proximity to Y. polylepis. These findings underscore the ecological specialization that exists within the genus Yunnanilus and highlight the urgent need for species-specific conservation strategies, given their restricted distributions and dependence on specific habitats.
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References
- Du LN, Chen XY, Yang JX (2008) A review of the Nemacheilinae genus Oreonectes Günther with descriptions of two new species (Teleostei, Balitoridae). Zootaxa 1729: 23–36. https://doi.org/10.11646/zootaxa.1729.1.3
- Du LN, Yang J, Min R, Chen XY, Yang JX (2021) A review of the Cypriniform tribe Yunnanilini Prokofiev, 2010 from China, with an emphasis on five genera based on morphologies and complete mitochondrial genomes of some species. Zoological Research 42: 310–334. https://doi.org/10.24272/j.issn.2095-8137.2020.229
- Du LN, Li SJ, Xu F, Luo T, Luo FG, Yu GH, Zhou J (2023) Clarification of Phylogenetic Relationships among Chinese Nemacheilids with Tube-Shaped Anterior Nostrils, with a Description of a New Genus and Two New Species. Journal of Zoological Systematics and Evolutionary Research 2023: 3600085. [11 pp] https://doi.org/10.1155/2023/3600085
- Kottelat M (1990) Indochinese nemacheilines: A revision of nemacheiline loaches (Pisces: Cypriniformes) of Thailand, Burma, Laos, Cambodia and southern Viet -nam. Druckerei braunstein, München. Indochinese Nemacheilines, 262 pp.
- Kottelat M, Chu XL (1988) Revision of Yunnanilus with descriptions of a miniature species flock and six new species from China (Cypriniformes, Homalopteridae). Environmental Biology of Fishes 23: 65–93. https://doi.org/10.1007/BF00000739
- Miller MA, Pfeiffer W, Schwartz T (2010) "Creating the CIPRES Science Gateway for inference of large phylogenetic trees" in proceedings of the Gateway Computing Environments Workshop (GCE), 14 Nov. 2010, New Orleans, LA, 1–8. https://doi.org/10.1109/GCE.2010.5676129
- Nichols JT (1925) Nemacheilus and related loaches in China. American Museum Novitates 171: 1.
- Qin ZX, Shao WH, Du LN, Wang ZX (2024) A new species of Yunnanilus (Cypriniformes, Nemacheilidae) from Yunnan, southwest China. Zoosystematics and Evolution 100(2): 747–754. https://doi.org/10.3897/zse.100.122962
- Ronquist F, Teslenko M, van der Mark P, Ayres DL, Darling A, Höhna S, Larget B, Liu L, Suchard MA, Huelsenbeck JP (2012) MrBayes 3.2: Efficient Bayesian phylogenetic inference and model choice across a large model space. Systematic Biology 61(3): 539–542. https://doi.org/10.1093/sysbio/sys029
- Stamatakis A (2014) RAxML Version 8: A tool for phylogenetic analysis and post-analysis of large phylogenies. Bioinformatics 30(9): 1312–1313. https://doi.org/10.1093/bioinformatics/btu033
- 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
- Yang JX, Chen YR (1995) The biology and resource utilization of the fishes of Fuxian Lake, Yunnan. Yunnan Science and Technology Press, Kunming, China, 224 pp
- Zhang E, Shen JZ (1999) Horny derivative of bone-fish skin—multicellular horny tubercle. Chinese Journal of Zoology 34(3): 52–56.
- Zhu SQ (1989) The Loaches of the Subfamily Nemacheilinae in China (Cypriniformes, Cobitidae). Jiangsu Science & Technology Publishing House, Nanjing, China, 1–150.