Abstract
Two new species of the sisorid catfish genus Euchiloglanis are described from the upper Yangtze River and the upper Black River drainage (Red River basin) in China. Euchiloglanis longibarbatus n. sp. from the upper Yangtze River differs from E. davidi, E. kishinouyei and E. longus n. sp. by having an elongate and threadlike maxillary barbel with a pointed tip reaching posteriorly to beyond the gill opening. It differs from E. dorsoarcus by having the anal-fin origin closer to the caudal-fin base than to the pelvic-fin origin, and from E. phongthoensis by having the anus located midway between the pelvic-fin insertion and the anal-fin origin. Euchiloglanis longus n. sp. from the upper Black River drainage differs from E. davidi by having the length of the pectoral fin equal to 78.4–89.5% of the distance between the origins of the pectoral and pelvic fins, and from E. kishinouyei and E. longibarbatus n. sp. by having the distance between the origins of the pelvic and anal fins equal to 108.9–140.6% of the distance between the origins of the pectoral and pelvic fins. It further differs from E. davidi, E. kishinouyei, and E. longibarbatus n. sp. by having the depth of the caudal peduncle equal to 14.1–27.0% of the length of the caudal peduncle. It differs from E. dorsoarcus by having the anal-fin origin closer to the caudal-fin base than to the pelvic-fin origin, and from E. phongthoensis by having the distance from the adipose-fin origin to the dorsal-fin insertion equal to about 50% of the adipose-fin base length. Euchiloglanis davidi and E. kishinouyei are redescribed from recently collected specimens from their type localities. A lectotype is designated for E. davidi and a neotype designated for E. kishinouyei. Euchiloglanis kishinouyei is distinguished from E. davidi by lacking an indentation in the premaxillary tooth band, by having the length of the pectoral fin equal to 75.5–89.6% of the distance between the insertions of the pectoral and pelvic fins, and by having the distance between the insertion of the pelvic-fin and the anus equal to 81.5–97.5% of the distance between the insertions of the pectoral and pelvic fins. A key to the species of is Euchiloglanis also provided.References
Chu, X.L. (1979) Systematics and evolutionary pedigree of the glyptosternoid fishes (Family Sisoridae). Acta Zootaxonomica Sinica, 4, 72–80. (In Chinese, English summary.)
Chu, X.L. (1981) Taxonomic revision of the genera Pareuchiloglanis and Euchiloglanis. Zoological Research, 2, 25–31. (In Chinese, English summary.)
Chu, X.L. (1986) Ichthyofauna and its geographical subdivision in Yunnan, China. In: Uyeno, T., Arai, R., Taniuchi, T., & Matsuura, K. (eds.). Indo-Pacific Fish Biology: Proceedings of the Second International Conference on Indo-Pacific Fishes. Ichthyological Society of Japan, Tokyo, pp. 471–476.
Chu, X.L., Mo, T.P. & Kuang, P.R. (1990) Siluriformes: Sisoridae. In: Chu X.L. & Chen Y.R. (eds.). The Fish of Yunnan, China: Part II. Science Press, Beijing, pp. 212–215. (In Chinese.)
Chu, X.L. & Mo, T.P. (1999) Siluriformes: Sisoridae. In: Chu, X.L., Zheng, B.S. & Dai, D.Y. (eds.). Fauna Sinica. Osteichthyes. Siluriformes. Science Press, Beijing, pp. 177–180. (In Chinese.)
Ding, R.H. (1994) The Fishes of Sichuan, China. Sichuan Sciences and Technology Press, Chengdu, 641 pp. (In Chinese.)
Günther, A. (1892) List of the species of reptiles and fishes collected by Mr. A. E. Pratt on the upper Yang-tze-kiang and in the province Sze-Chuen, with description of the new species. Appendix II. In Pratt, A. E. (Ed.), To the Snows of Tibet through China, Longmans, Green and Co., London and New York, pp. 238–250, pls. 1–4.
Günther, A. (1896) Report on the collections of reptiles, batrachians and fishes made by Messrs. Potanin and Berezowski in the Chinese provinces Kansu and Sze-chuen. Ezhegodnik Zoologicheskogo Muzeya Akademii Nauk SSSR, 1, 199–219, Pls. 1–2.
Guo, X.G., Zhang, Y.G. & He, S.P. (2004a) Morphological variations and species validity of genus Euchiloglanis (Siluriformes: Sisoridae) in China. Acta Hydrobiologica Sinica, 28, 260–268. (In Chinese, English summary.)
Guo, X.G., Zhang, Y.G., He, S.P. & Chen, Y. (2004b) Mitochondrial 16S rRNA sequence variations and phylogeny of Chinese sisorid catfishes. Chinese Science Bulletin, 15, 1586–1595.
Guo, X.G., He, S.P. & Zhang, Y.G. (2005) Phylogeny and biogeography of Chinese sisorid catfishes re-examined using mitochondrial cytochrome b and 16S rRNA gene sequences. Molecular Phylogenetics Evolution, 35, 344–362.
Guo, X.G., He, S.P. & Zhang, Y.G. (2007) Phylogenetic relationships of the Chinese sisorid catfishes: a nuclear intron versus mitochondrial gene approach. Hydrobiologia, 579, 55–68.
He, S.P. (1995) The analysis of historical biogeography for the glyptosternoid fishes (Teleostei: Siluriform, Sisoridae). Biogeographica, 71, 145–160.
He, S.P. (1996) The phylogeny of the glyptosternoid fishes (Teleostei: Siluriform, Sisoridae). Cybium, 20, 115–159.
He, S.P., Cao, W.X. & Chen, Y.Y. (2001) The uplift of Qinghai-Xizang (Tibet) Plateau and the vicariance speciation of glyptosternoid fishes (Siluriformes: Sisoridae). Science in China (Series C), 31, 185–192. (In Chinese.)
Hora, S.L. (1923) Notes on fishes in the Indian Museum, 5. On the composite genus of Glyptosternum McClelland. Records of the Indian Museum, 25, 1–44.
Hora, S.L. & Silas, E.G. (1952) Notes on fishes in Indian Museum, 47. Revision of the glyptosternoid fishes of the family Sisoridae, with descriptions of new genera and species. Records of the Indian Museum, 49, 5–29.
ICZN (1999) International Code of Zoological Nomenclature, 4th edn. The International Commission on Zoological Nomenclature, London, 125 pp.
Kimura, S. (1934) Description of the fishes collected from the Yangtze-Kiang, China, by late Dr. K. Kishinouye and his party in 1927-1929. Journal of the Shanghai Science Institute, 1, 11–247.
Li, F.L., Li, X., Fu, Q. & Zhou, W. (2006) Fish diversity in Simao District, Yunnan. Journal of Guangxi Normal University (Natural Science edition), 24, 77–80. (Chinese, with English summary.)
Ng, H.H. (2004) Two new glyptosternine catfishes (Teleostei: Sisoridae) from Vietnam and China. Zootaxa, 428, 1–12.
Ng, H.H. & Kottelat, M. (1998) The catfish genus Akysis Bleeker (Teleostei: Akysidae) in Indochina, with descriptions of six new species. Journal of Natural History, 32, 1057–1097.
Ng, H.H. & Kottelat, M. (1999) Oreoglanis hypsiurus, a new species of glyptosternine catfish (Teleostei: Sisoridae). Ichthyological Exploration of Freshwaters, 10, 375–380.
Nguyen, V.N. (2005) Ca Nuoc Ngot Viet Nam. Tap II. [The Freshwater Fishes of Vietnam. Vol. II]. Nha Xuat Ban Nong Ngiep, Hanoi, 760 pp.
Norman J.R. (1925) Two new fishes from Tonkin, with notes on the siluroid genera Glyptosternum, Exostoma, etc. Annals and Magazine of Natural History, 15, 507–574.
Peng Z.G., He, S.P. & Zhang, Y.G. (2004) Phylogenetic relationships of glyptosternoid fishes (Siluriformes: Sisoridae) inferred from mitochondrial cytochrome b gene sequences. Molecular Phylogenetics and Evolution, 31, 979–987.
Peng, Z.G., Ho, S.Y.W., Zhang, Y.G. & He, S.P. (2006) Uplift of the Tibetan plateau: Evidence from divergence times of glyptosternoid catfishes. Molecular Phylogenetics and Evolution, 39, 568–572.
Regan, C.T. (1905) A synopsis of the species of the silurid genera Parexostoma, Chimarrhichthys, and Exostoma. Annals and Magazine of Natural History (Ser. 7), 15, 182–185.
Regan, C.T. (1907) Report on a collection of batrachia, reptiles and fish from Nepal and the western Himalayas. Records of the Indian Museum, 1, 157–158.
Sauvage, H.E. (1874) Notices ichthyologiques. Revue et Magasin de Zoologie, (Ser. 3), 2, 332–340
Tchang, T.L. (1960) The Siluriform fishes of China. People Education Press, 67 pp. (In Chinese.)
Thomson, A.W. & Page, L.M. (2006) Genera of the Asian Catfish Families Sisoridae and Erethistidae (Teleostei: Siluriformes). Zootaxa, 1345, 1–96.
Wu, Y.F. & Chen, Y. (1979) Note on fishes from Golog and Yushu region of Qinghai province, China. Acta Zootaxonomica Sinica, 4, 287–296. (In Chinese, English summary.)
Zhou, W., Liu, J.H. & Ye, X.M. (1999) Comparison of fish βdiversity among three branches of Yuanjiang river system, Yunnan. Zoological Research, 20, 111–117. (In Chinese, English summary.)