Sudasinghe Hiranya, Pethiyagoda Rohan, Maduwage Kalana
Evolutionary Ecology and Systematics Lab, Department of Molecular Biology and Biotechnology, University of Peradeniya, Peradeniya, Sri Lanka.
Postgraduate Institute of Science, Faculty of Science, University of Peradeniya, Sri Lanka.
Zookeys. 2019 Jan 28(820):25-49. doi: 10.3897/zookeys.820.29632. eCollection 2019.
Morphological and molecular analyses of specimens representative of the geographic range of the cyprinid genus in Sri Lanka suggest the presence of only a single species in the island, for which the name Jordan & Starks, 1917, is available. is a species endemic to Sri Lanka, distributed across the lowlands of both of the island's main climatic zones. It is distinguished from all other species of , including the three species recorded from peninsular India (, , and ), by a suite of characters that includes a body depth of 26.9-31.2% of the standard length (SL), 42-56 scales in the lateral series (of which usually 8-16 are pored), 20-24 circumpeduncular scales, 14-17 scale rows between the origins of the dorsal and pelvic fins, a dorsal-fin height of 21.1-27.6% SL, 18-19 caudal vertebrae and an eye diameter of 22.7-30.5% of the head length. differs from and by uncorrected pairwise genetic distances of more than 9% and 6%, respectively, for the mitochondrial cytochrome oxidase subunit 1 (COI) gene.
对代表斯里兰卡鲤科鱼类地理分布范围的标本进行的形态学和分子分析表明，该岛屿仅存在一个物种，其名称为Jordan & Starks，1917年已可用。该物种是斯里兰卡特有的，分布于该岛两个主要气候区的低地。它与所有其他该属物种不同，包括从印度半岛记录的三个物种（分别为[具体物种1]、[具体物种2]和[具体物种3]），其具有一系列特征，包括体高为标准长度（SL）的26.9 - 31.2%，侧线鳞42 - 56枚（其中通常8 - 16枚有孔），围尾柄鳞20 - 24枚，背鳍起点与臀鳍起点之间有14 - 17列鳞片，背鳍高为SL的21.1 - 27.6%，有18 - 19枚尾椎骨，眼径为头长的22.7 - 30.5%。对于线粒体细胞色素氧化酶亚基1（COI）基因，该物种与[具体物种1]和[具体物种2]的未校正成对遗传距离分别超过9%和6%。
