摘要
报道了2020年10月在贵州北部乌江流域芙蓉江支流芙蓉江水系采集到的鲤科Cyprinidae鱼类样本,经鉴别为光唇鱼属Acrossocheilus一新种,命名为芙蓉江光唇鱼A. furongjiangensis sp. nov.。新种体细长而侧扁,尾柄细;头短小;须2对。肠道有4道弯曲。背鳍起点位于吻端至尾鳍基中点或略偏后;胸鳍末端伸达胸鳍起点至腹鳍起点中部或稍后;腹鳍起点与背鳍起点几乎相对;臀鳍起点位于腹鳍和尾鳍基的中点;尾鳍叉形。侧线完全。背鳍ⅲ-8;胸鳍ⅱ-15;腹鳍ⅲ-8;臀鳍ⅲ-5。该新种与云南光唇鱼A. yunnanensis外形相似,但新种躯体更细长、头更短、尾柄更细长、眼更大、两眼更靠近。新种背鳍末根不分枝鳍条为粗壮硬刺,后缘有17~20个锐利锯齿。鳔后室长超过前室长的2倍,前室椭圆前端有凹陷。体色自幼鱼至成鱼体侧均无不规则黑色斑点。上颌须长,向后延伸超过眼外缘。眼中点水平延伸线与鳃盖外缘近中部相接。新种与分布于贵州水域的同属种如吉首光唇鱼A. jishouensis、虹彩光唇鱼A. iridescens在体高、头长、头高、尾柄高和眼径上的差异均极显著(P<0.01)。
In this paper,the samples of Cyprinidae fishes were collected from the Furongjiang River(Huaixi River,Huaiping village,Jiucheng Town,Daozhen Gelao and Miao Autonomous County,Zunyi City,Guizhou Province),a tribu-tary of the Furongjiang River in the Wujiang River Basin in northern Guizhou Province in October 2020.The fish samples were taxonomically identified as a novel species belonging to the genus Acrossocheilus and designated as A.furongjiangensis sp.nov.The newly discovered species is slender and laterally flat,with a thin caudal peduncle.It has a short head.The mouth is short.The species has two pairs of barbels.The intestine is slightly longer,with four bends.The dorsal fin is in-serted from the rostral end to the midpoint of the caudal fin base or slightly behind.The pectoral fin extends from the dorsal fin insertion point to the middle of or briefly after the pelvic fin insertion point.The ventral fin is inserted roughly opposite to the dorsal fin.The insertion point of anal fin at the midpoint of the ventral fin and the caudal fin base.The caudal fin is forked.The lateral line is complete.The dorsal fin hasⅲ-8 rays,the pectoral fin hasⅱ-15 rays,the ventral fin hasⅲ-8 rays,and the anal fin hasⅲ-5 rays.It is morphologically similar to A.yunnanensis but can be distinguished by the follow-ing characteristics:the body depth is 21.28%of the body length(vs.27.95%),the head length is 21.86%of the body length(vs.24.17%),the caudal peduncle depth is 8.99%of the body length(vs.9.96%);eye diameter is 29.90%of the head length(vs.25.22%),the interorbital width is 34.58%of the headlength(vs.37.15%).The last simple dorsal-fin ray serrated posterior edge with sharp serrations 17-20(vs.16-23);the length of the posterior chamber of the swim bladder is more than twice the length of the anterior chamber,which has a concave anterior end ellipsoid(vs.the length of the posterior chamber is equal to twice the length of the anterior chamber,and the anterior chamber is round).Additional characteristics are as follows:the new species has no irregular black spots on the sides of the body from juvenile to adult(vs.there are 6-11 small black spots on the back of the lateral line of juvenile fish).The maxillary whiskers of the new species were long and extend backwards beyond the outer edge of the eye(vs.extension only reaches the midpoint of the eye).The horizontal extension line of the midpoint of the eye is connected to the outer edge of the gill cap near the middle in new species,while the horizontal extension line of the midpoint of the eye of the A.yunnanensis connected to the upper edge of the gill cap.The new species havs no vertical stripes on the side of the body,and the morphological characteristics such as body depth,head length,head depth,caudal peduncle depth,and eye diameter are significantly different from those from those of A.jishouensis and A.iridescens(P<0.01).
作者
肖贵榜
陆武军
廖丽
毛茜
王礼节
张浩然
周林
鲍娟
XIAO Guibang;LU Wujun;LIAO Li;MAO Qian;WANG Lijie;ZHANG Haoran;ZHOU Lin;BAO Juan(Department of Modern Agriculture,Zunyi Vocational and Technical College,Zunyi,Guizhou Province 563000,China;Department of Biochemistry and Molecular Biology,West China School of Basic Medical Sciences&Forensic Medicine,Sichuan University,Chengdu 610041,China;Guizhou Ecological Fishery Co.,Ltd.,Guiyang 550022,China)
出处
《四川动物》
北大核心
2024年第2期205-214,共10页
Sichuan Journal of Zoology
基金
贵州省科技厅科技计划项目(黔科合支撑[2020]1Y103号)
贵州省科技厅科技计划项目(黔科合支撑[2022]一般095)
遵义职业技术学院院级科研课题(1-ZZYB-202012)。
关键词
鲤科
光唇鱼属
新种
芙蓉江
乌江流域
贵州北部
Cyprinidae
Acrossocheilus
new species
Furongjiang River
Wujiang River Basin
northern Guizhou
