Lalronunga Samuel, Kumar Sumit, Singh Mahender
a Department of Zoology, Pachhunga University College , Aizawl , India.
b ICAR-National Bureau of Fish Genetic Resources , Lucknow , India.
Mitochondrial DNA A DNA Mapp Seq Anal. 2019 Jan;30(1):52-59. doi: 10.1080/24701394.2018.1450398. Epub 2018 Apr 26.
Neolissochilus kaladanensis sp. nov., a new cyprinid species, is described from the Kaladan River drainage of Mizoram. It differs from all other valid Neolissochilus species in having higher number of gill rakers on the lower arm of the first gill arch (13-14 vs. 12 or below in all the species). The analysis of mitochondrial gene cytochrome c oxidase subunit I (COI) sequences separated N. kaladanensis sp. nov. from all other Neolissochilus and Tor species with an average genetic distance of 6.0%. It is further separated from the morphologically most similar species N. hendersoni and N. soroides by a genetic distance of 6.7% and 6.8%, respectively. Based on the lowest BIC and AICc scores, best fit model for COI dataset was TN93 + G + I, out of 24 different nucleotide substitution models tested. The maximum-likelihood (ML) phylogenetic tree was constructed using the COI sequences of representative Neolissochilus and Tor species. The anomalies observed among the GenBank sequences of the genera Tor and Neolissochilus are also discussed.
新种卡拉丹新纹唇鱼（Neolissochilus kaladanensis sp. nov.），一种鲤科新物种，采自米佐拉姆邦的卡拉丹河流域。它与所有其他有效新纹唇鱼物种的区别在于，第一鳃弓下臂的鳃耙数量更多（13 - 14个，而所有其他物种为12个或更少）。对线粒体基因细胞色素c氧化酶亚基I（COI）序列的分析表明，卡拉丹新纹唇鱼与所有其他新纹唇鱼和野鲮属物种分离，平均遗传距离为6.0%。它与形态上最相似的亨德森新纹唇鱼（N. hendersoni）和索氏新纹唇鱼（N. soroides）的遗传距离分别为6.7%和6.8%。在测试的24种不同核苷酸替换模型中，基于最低的贝叶斯信息准则（BIC）和校正赤池信息准则（AICc）得分，COI数据集的最佳拟合模型为TN93 + G + I。使用代表性新纹唇鱼和野鲮属物种的COI序列构建了最大似然（ML）系统发育树。还讨论了在野鲮属和新纹唇鱼属的GenBank序列中观察到的异常情况。
