摘要
2008年9月,在广西壮族自治区罗城县天河镇附近一洞穴采集到一批条鳅亚科鱼类标本。经鉴定,为岭鳅属(Oreonectes)一新种。新种与岭鳅属的其他已知种类在以下组合特征上有区别:背鳍条3,7;臀鳍条2,5;胸鳍条1,11～12;腹鳍条1,7;尾鳍分枝鳍条为14～16。头平扁;眼正常;下唇表面具浅皱。腹鳍起点位于背鳍起点垂线下方之前,尾柄上、下缘无明显鳍褶;尾鳍后缘平截。体侧具不明显的细小鳞片,或鳞片隐于皮下。头部无侧线感觉系统管孔。成体粉红色,无色素,各鳍透明;浸泡标本体呈乳黄色,不透明,通体无色斑。
A cave-dwelling loach,Oreonectes luochengensis sp.nov.has been described based on collections from a cave in Tianhe town,Luocheng,Guangxi,China in September 2008.It can be distinguished from all known Oreonectes species by the following combination of characters：dorsal-fin rays 3,7;anal-fin rays 2,5;pectoral-fin rays 1,11 12;pelvic-fin rays 1,7 and 14 16 branched caudal-fin rays;head compressed;eyes present;surface of lower lip covered with shallow longitudinal groove;dorsal-fin origin posterior to vertical line of pelvic-fin origin;caudal peduncle without caudal-adipose keels;edge of caudal fin truncation;tiny scales present under skin;no cephalic lateral-line system;body pink in living status,without pigments in adult,after fixed in formalin,body yellowish,non-transparent,no markings on body side.
基金
国家自然科学基金项目(30730017
31071907)
广西洞穴鱼类的分类及保护研究项目(2060302)
广西师范学院博士科研启动基金项目
关键词
广西
新种
爬鳅科
岭鳅属
Guangxi
New species
Balitoridae
Oreonectes
