Lefua tokaiensis, a new species of nemacheilid loach from central Japan (Teleostei: Nemacheilidae)

Abstract

A new nemacheilid loach, Lefua tokaiensis sp. nov., is described from the small mountain streams in the Tokai region, central Honshu, Japan. Lefua tokaiensis is distinguished from all other species of Lefua by the following combination of characters: eyes located dorsally on the head, presence of a narrow conspicuous longitudinal mark between the base of the outer rostral barbel and the eye, absence of a rhomboid or triangular dark blotches on the middle of the caudal fin base, absence of a black longitudinal stripe on both body sides in mature males, absence of dusky cross bars on the dorsal area of the body, absence of a dusky bar beside the dorsal fin base, typical presence of small dark spots on the dorsal and caudal fins, presence of the obscure dark band in skin of the caudal fin base, caudal fin slightly squared off at the apex, and modally four hypurals.

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References

  1. Asaka T, Uchiyama R (2017) Spawning behavior of the Tokai fluvial eight-barbel loach (Lefua sp.2) observed at a headwater stream in Toyokawa-shi, Aichi Prefecture. Izunuma-Uchinuma Wetl Res 11:17–24

    Google Scholar 

  2. Fujita K (1990) The caudal skeleton of teleostean fishes. Tokay University Press, Tokyo

    Google Scholar 

  3. Herre AWCT, Lin SY (1936) Fishes of the Tsien Tang River system. Bull Chekiang Prov Fish Exp Stn 2:1–37

    Google Scholar 

  4. Herzenstein SM (1887) Fische. i–vi. In: Warpachowski NA, Herzenstein SM (eds) Wissenschaftliche Resultate der von N. M. Przewalski nach Central-Asien unternommenen Reisen. Band 3, Adth. 2. Kaiserliche Akademie der Wissenschaften, St. Petersburg, pp 1–90

  5. Herzenstein, SM (1888) Fische. In: Warpachowski NA, Herzenstein SM (eds) Wissenschaftliche Resultate der von N. M. Przewalski nach Central-Asien unternommenen Reisen. Band 3, Adth. 2. Kaiserliche Akademie der Wissenschaften, St. Petersburg, pp. 91–180

  6. Hosoya K (1983) Geographic variation of number of vertebrae in Squalidus. Freshw Fish 9:43–48

    Google Scholar 

  7. Hosoya K (2002) Cobitidae. In: Nakabo T (ed) Fishes of Japan with pictorial keys to the species. English edition. Tokai University Press, Tokyo, pp 272–277, 1467

  8. Hosoya K (2013) Cobitidae. In: Nakabo T (ed) Fishes of Japan with pictorial keys to the species, third edition. Tokai University Press, Tokyo, pp 328–334, 1819–1822

  9. Hosoya K (2015) Freshwater fishes of Japan. Yama-Kei Publishers, Tokyo

    Google Scholar 

  10. Hosoya K, Ito T, Miyazaki J (2018) Lefua torrentis, a new species of loach from western Japan (Teleostei: Nemacheilidae). Ichthyol Explor Freshw 28:193–201

    Google Scholar 

  11. Hubbs CL, Lagler KF (2004) Fishes of the Great Lakes region. Revised edition. University of Michigan Press, Bloomfield Hills

    Google Scholar 

  12. Jordan DS, Fowler HW (1903) A review of the Cobitidae, or loaches of the rivers of Japan. Proc U S Natl Mus 26:765–774

    Article  Google Scholar 

  13. Jordan DS, Richardson RE (1907) On a collection of fishes made in Korea, by Pierre Louis Jouy, with description of new species. Proc U S Natl Mus 33:263–264

    Article  Google Scholar 

  14. Kawamura K, Hosoya K (1991) A modified double staining technique for making a transparent fish-skeletal specimen. Bull Nat Res Inst Aquac 20:11–18

    Google Scholar 

  15. Kessler KF (1876) Descriptions of the fishes collected by Col. Przewalski in Mongolia. Vol 2 (4). In: Przewalski N (ed) Mongolia, and the land of the Tanguts. Imperatorskaya Akademiya Nauk, St. Petersburg, pp 1–36

    Google Scholar 

  16. Komori A, Matsuzaki A, Gomi A, Nakazawa M, Asaka T, Miyazaki J (2010) Preliminary report of the three-year field work for conservation of Lefua sp. Bull Fac Edu Hum Sci Univ Yam 13:12–21

    Google Scholar 

  17. Kottelat M (2012) Conspectus cobitidum: an inventory of the loaches of the world (Teleostei: Cypriniformes: Cobitoidei). Raffles Bull Zool 26:1–199

    Google Scholar 

  18. 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 Bull Zool 27:1–663

    Google Scholar 

  19. Mayr E (1942) Systematics and the origin of species from the viewpoint of a zoologist. Columbia University Press, New York

    Google Scholar 

  20. Mayr E (1963) Animal Species and Evolution. Harvard University Press, Cambridge

    Google Scholar 

  21. Miyazaki J, Nakao K, Mihara M, Sakai T, Gunji Y, Tojo K, Muraoka K, Hosoya K (2007) Incongruence between mtDNA phylogeny and morphological and ecological characters in loaches of the genus Lefua (Balitoridae, Cypriniformes). Zool Sci 24:666–675

    CAS  Article  Google Scholar 

  22. Miyazaki J, Dobashi M, Tamura T, Beppu S, Sakai T, Mihara M, Hosoya K (2011) Parallel evolution in eight-barbel loaches of the genus Lefua (Balitoridae, Cypriniformes) revealed by mitochondrial and nuclear DNA phylogenies. Mol Phylogenet Evol 60:416–427

    Article  Google Scholar 

  23. Miyazaki J, Tamura T, Hida S, Sakai T (2018) Local introgression of mitochondrial DNA in eight-barbel loaches of the genus Lefua (Balitoridae, Cypriniformes). Zool Sci 35: 140–148

    CAS  Article  Google Scholar 

  24. Nakajima J (2017) Loaches of Japan—natural history and culture. Yama-Kei Publishers, Tokyo

    Google Scholar 

  25. Nakajima J (2018) Nemacheilidae. In: Nakabo T (ed) The natural history of the fishes of Japan. Shougakukan, Tokyo, pp 116–117

    Google Scholar 

  26. Nichols JT (1943) The fresh-water fishes of China. American Museum of Natural History, New York

    Google Scholar 

  27. Prokofiev AM (2005) Osteology of Oreonectes platycephalus Günther, 1868 (Balitoridae: Nemacheilinae) with remarks on the genus composition and its phylogenetic relations. J Ichthyol 45:429–443

    Google Scholar 

  28. Sawada Y (1982) Phylogeny and zoogeography of the superfamily Cobitoidea (Cyprinoidei, Cypriniformes). Mem Fac Fish Hokkaido Univ 28:65–223

    Google Scholar 

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Acknowledgments

We are grateful to M. Sugiura, T. Asaka, T. Morishita, and M. Takemoto for collecting several specimens and data to clarify the total variance of L. tokaiensis, and M. Matsushita for drawings of the holotype of L. tokaiensis. We sincerely thank M. Matsunuma (KUN) for observations of materials under his care.

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Correspondence to Taiki Ito.

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Ito, T., Hosoya, K. & Miyazaki, J. Lefua tokaiensis, a new species of nemacheilid loach from central Japan (Teleostei: Nemacheilidae). Ichthyol Res 66, 479–487 (2019). https://doi.org/10.1007/s10228-019-00690-0

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Keywords

  • Endangered species
  • Head water
  • Parallel evolution
  • Tokai region