A review of the Cypriniform tribe Yunnanilini Prokofiev, 2010 from China, with an emphasis on five genera based on morphologies and complete mitochondrial genomes of some species
Li-Na Du, 广西师范大学珍稀濒危动植物生态与环境保护教育部重点实验室，广西 桂林541004，中国, Jian Yang, Rui Min, Xiaoyong Chen, Junxing Yang, 广西师范大学广西珍稀濒危动物生态学重点实验室，广西 桂林 541004，中国, 南宁师范大学北部湾环境演变与资源利用教育部重点实验室，广西 桂林530001，中国, 中国科学院昆明动物研究所，云南 昆明650223，中国, 中国科学院东南亚生物多样性研究中心，内比都 耶津05282，缅甸, 中国科学院昆明动物研究所遗传资源与进化国家重点实验室，中国科学院种子创新研究院，云南 昆明650224，中国, 云南省高原鱼类育种重点实验室，云南省高原湖泊健康与修复工程研究中心，云南 昆明650224，中国
Abstract
The loach tribe Yunnanilini from China is reviewed here using morphological characters and complete mitochondrial genomes of select species. Molecular data suggest that the tribe Yunnanilini is not monophyletic and can be divided into three clades. Species of the <i>Yunnanilus nigromaculatus</i> group form an independent genus and are placed in <i>Eonemachilus</i>. In the phylogenetic tree, <i>Y. jinxiensis</i> clusters with <i>Paranemachilus genilepis</i>, and <i>Y. pulcherrimus</i> clusters with <i>Micronemacheilus cruciatus</i>, indicating that <i>Y. jinxiensis</i> and <i>Y. pulcherrimus</i> belong to <i>Paranemachilus</i> and <i>Micronemacheilus</i>, respectively. Based on morphological data, <i>Y. bailianensis</i> and <i>Y. longibarbatus</i> are placed in <i>Heminoemacheilus</i>, while <i>Y. jinxiensis</i> and <i>Y. pulcherrimus</i>, are placed in <i>Paranemachilus</i> and <i>Micronemacheilus</i>, respectively. <i>Yunnanilus niulanensis</i> and <i>Y. qujinensis</i> are treated as junior synonyms of <i>Eonemachilus caohaiensis</i>. <i>Eonemachilus</i>, <i>Micronemacheilus</i>, and <i>Yunnanilus</i> are show short separation between anterior and posterior nostrils. The genera can be distinguished from each other by mouth structure, lateral line and cephalic lateral-line canals, and papillae on median part of both lips. The anterior and posterior nostrils of <i>Heminoemacheilus</i> and <i>Paranemachilus</i> are closely set. <i>Paranemachilus</i> and <i>Micronemacheilus</i> are distinguished by cheeks covered with scales and lips with papillae, respectively. Our phylogenetic tree and morphological characters support <i>Traccatichthys</i> as a valid genus, which can be distinguished from <i>Micronemacheilus</i> by anterior and posterior nostrils closely set (vs. clearly separated). Four species are placed in <i>Traccatichthys</i>.