摘要
2010年6月29日,在广西壮族自治区环江县长美乡关安村附近地下溶洞出水口采集到一批条鳅亚科鱼类标本。经鉴定,为岭鳅属Oreonectes一未经发表的新种。新种以下组合特征可与岭鳅属的其他已知种类区别：背鳍分枝鳍条为7,臀鳍分枝鳍条为5,胸鳍分枝鳍条为10~11,腹鳍分枝鳍条为7~8,尾鳍分枝鳍条为13~17。头平扁;眼正常,明晰;下唇表面具浅皱。腹鳍起点相对于背鳍起点垂直下方或略前,尾柄上、下缘无明显鳍褶;尾鳍后缘圆弧形。通体被鳞。头部侧线感觉系统发达。侧线不完全,具7~13个侧线孔,最后一个侧线孔不达胸鳍末端的垂直上方。体侧沿侧线具一深褐色条纹。鳔后室发达,末端后伸近腹鳍起点。
A cave-dwelling loach,Oreonectes guananensis sp.nov.was recognized based on collections from several caves in Guan＇an village,Changmei town,Huanjiang County,Guangxi,China,in June 2010.It can be distinguished from all known Oreonectes species by the following combination of characters：7 branched dorsal-fin rays,5 branched anal-fin rays,10～11 branched pectoral-fin rays,7～8 branched pelvic-fin rays and 13～17 branched caudal-fin rays;head compressed;eyes present;surface of lower lip covered with shallow longitudinal groove;dorsal-fin origin opposite or posterior to vertical line of pelvic-fin origin;caudal peduncle without caudal-adipose keels;edge of caudal fin rounded;scales present;cephalic lateral-line system developed;lateral line incomplete,with 7～13 pores;a dark brown stripe present along lateral line;posterior chamber of air-bladder developed,extending to nearly pelvic-fin origin.
出处
《广西师范大学学报（自然科学版）》
CAS
北大核心
2011年第1期72-75,共4页
Journal of Guangxi Normal University:Natural Science Edition
基金
广西洞穴鱼类的分类及保护研究项目(2060302)
关键词
爬鳅科
岭鳅属
新种
广西
Balitoridae
Oreonectes
new species
Guangxi
China
