摘要
20 0 3年 6月 2日作者于云南省沾益县德泽乡牛栏江 (属金沙江水系 )采集到似原吸鳅属鱼类 7尾标本 ,经鉴定为 1新种。新种鳃孔窄 ,可与同属中鳃孔较宽的似原吸鳅Paraprotomyzonmultifasciatus和龙口似原吸鳅P .lungkowensis明显区分 ,而与鳃孔窄的巴马似原吸鳅P .bamaensis和云南似原吸鳅P .yunnanensis相似。新种与巴马似原吸鳅P .bamaensis相比 ,两者在下列特征上可明显区分 :1)新种下唇无向后伸展的唇片 ,后者具唇片 ;2 )新种吻褶两侧后角之后具侧沟 ,后具无侧沟 ;3)新种腹鳍为i 15～ 17,后者为i 12～ 13。与云南似原吸鳅P .yunnanensis相比 ,两者的鉴别特征如下 :1)新种吻褶后侧具侧沟 ,后者吻褶后侧无侧沟 ;2 )新种胸鳍为i 19～ 2 2 ,而后者为i 2 6 ;3)新种腹鳍为i 15～ 17,后者为i 2 0。
Paraprotomyzon niulanjiangensis sp.nov.(Fig.1)Holotype:No.200306005,35.5?mm SL,collected form Niulanjiang(25°59′N,103°36′E),Zhanyi County,Yunnan,2 June 2003,deposited in the Fisheries Administration of Qujing,Yunnan. Paratypes:Nos.200306006(41?mm SL)and 200306009(37.5?mm SL),deposited in the Fisheries Administration of Qujing,Yunnan;paratypes:Nos.200306007(39.5?mm SL)and 200306008(39?mm SL),deposited in the Institute of Zoology,Chinese Academy of Sciences;paratypes:200306010(37?mm SL)and 200306011(39?mm SL),deposited in the Heilongtan Reservoir Administration,Shilin County,Yunnan. All paratypes have the same locality and same time as the holotype. D.iii-7;A.ii-5;P.i-19-22;V.i-15-17.Lateral scales 86-93. Depth of body in standard body length 6.1-6.5(6.3)(Unit:mm),width of body 4.7-4.9(4.7),length of head 4.7-4.9(4.8),length of caudal peduncle 6.5-6.8(6.7),depth of caudal peduncle 13.7-15.0(14.2). Depth of head in its length 1.6-2.0(1.8),width of head 1.0-1.1(1.0),length of snout 1.9-2.1(2.0),diameter of eye 5.3-6.0(5.7),width of interorbital space 2.1-2.2(2.1). Depth of caudal peduncle in its length 2.0-2.5(2.2). Width of mouth in width of head 3.1-4.2(3.8). Diagnosis. This new species is similar to P.bamaensis Tang and P.yunnanensis Li, Lu et Mao of the same genus by having small gill opening. But it can be distinguished from P.bamaensis by the following comparison:1)the new species has no lower lip laminae,the latter has the structure;2)the new species has lateral grooves behind rostral fold,the latter has no the structure;3)the ventral fin ray of the new species is i-15-17 vs. i-12-13 of the latter. The new species can be distinguished from P.yunnanensis by the following comparison:1)the new species has lateral grooves behind rostral fold,the latter has no the structure;2)the pectoral fin ray of the new species is i-19-22 vs. i-26 of the latter;3) the ventral fin ray of the new species is i-15-17 vs.i-20 of the latter.
出处
《动物分类学报》
CSCD
北大核心
2005年第1期202-204,共3页
Acta Zootaxonomica Sinica
