摘要
2008年5月,在广西壮族自治区靖西县禄洞村珠江水系采集到一批条鳅标本。经鉴定,为云南鳅属(Yunnanilus)一新种。新种靖西云南鳅(Yunnanilus jinxiensis)属于侧纹云南鳅种组(Yunnanilus pleurotaenis group)。但新种全身除胸腹部外被有鳞片;侧线较长,具有15—20个侧线管孔;背鳍分枝鳍条8;胸鳍分枝鳍条13—14;鳔两室,后室发达;尾鳍凹形;体长为体高的3.9—4.6倍,为头长的4.1—4.4倍,为尾柄高的7.5—9.0倍;头长为眼径的5.5—6.7倍,为眼间距的2.2—2.4倍等特征,可将新种与该种组内的其他种类相区分。
A nemacheiline loach Yunnanilusjinxiensis sp. nov. has been discovered in collections from a Pearl River Drainage in Ludong village, Jingxi county, and Guangxi of China in May 2008. Yunnanilusjinxiensis is a new member of the Yunnanilus pleurotaenis group. It can be distinguished from all other congeners in this group by the following characters： body entirely covered by scales, except between pectoral fins and pelvic fins; lateral line present, with 15-20 pores; dorsal fin with 8 branched rays; pectoral fin with 13-14 branched rays; the air bladder has two chambers, the anterior ones into bony capsules and a large free posterior chamber, filling body cavity; caudal fin slightly emarginated; body depth 3.9-4.6 times the standard length （SL）; head length 4.14.4 times SL; caudal peduncle depth 7.5-9.0 times SL; eye diameter 5.5-6.7 times the head length （HL）; interorbital width 2.2-2.4 times HL.
基金
国家重点基础研究发展计划(2007CB411600)
国家自然科学基金资助项目(30730017)
关键词
云南鳅
条鳅亚科
爬鳅科
广西
珠江水系
Yunnanilus
Nemacheilinae
Balitoridae
Guangxi
Pearl River
