A new species of the genus Misgurnus (Cypriniformes, Cobitidae) from Ryukyu Islands, Japan
A new species of the genus Misgurnus (Cypriniformes, Cobitidae) from Ryukyu Islands, Japan
复制标题
日本琉球群岛泥鳅属（鲤形目，鳅科）一新种
DOI：
10.11646/zootaxa.5162.5.4
复制
发表时间：
2022
期刊：
影响因子：
0.9
通讯作者：
HASHIGUCHI YASUYUKI
中科院分区：
文献类型：
--
作者：
NAKAJIMA JUN;HASHIGUCHI YASUYUKI
根据采自日本琉球群岛的27个模式标本，记述了泥鳅一新种。这一新种可通过下列特征组合与其同类种区分开来。1)成年男性胸鳍底部的环板呈极斧形，背部呈圆形。2)背鳍最后一条不分叉，长度不到第二条分枝软鳍长度的一半。3)从肛鳍根部后缘到尾鳍根部的投影长度大于从腹鳍插入点到肛鳍根部前缘的投影长度。4)尾柄上、下缘脊发育较弱。线粒体DNA控制区的系统发育分析也支持这个新物种的有效性。
A new loach species, Misgurnus amamianus, is described based on 27 type specimens sampled from Ryukyu Islands, Japan. This new species can be distinguished from its congeners by the following combination of characteristics. 1) In adult males, a lamina circularis at the base of the pectoral fin is poleaxe-shaped and rounded at the back. 2) The last ray of dorsal fin is not branched, and its length is less than half the length of the second-branched soft ray. 3) The projected length from the posterior edge of the anal-fin base to the caudal-fin base is longer than the length from the insertion point of the pelvic fin to the anterior edge of the anal-fin base. 4) The ridges on the caudal peduncle at the upper and lower edges are weakly developed. The validity of this new species is also supported by the phylogenetic analysis of the mitochondrial DNA control region.