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

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 Yunnanilus nigromaculatus group form an independent genus and are placed in Eonemachilus.In the phylogenetic tree,Y.jinxiensis clusters with Paranemachilus genilepis,and Y.pulcherrimus clusters with Micronemacheilus cruciatus,indicating that Y.jinxiensis and Y.pulcherrimus belong to Paranemachilus and Micronemacheilus,respectively.Based on while Y.jinxiensis and Y.pulcherrimus,are placed in Paranemachilus and Micronemacheilus,respectively.Yunnanilus niulanensis and Y.qujinensis are treated as junior synonyms of Eonemachilus caohaiensis.Eonemachilus,Micronemacheilus,and Yunnanilus 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 Heminoemacheilus and Paranemachilus are closely set.Paranemachilus and Micronemacheilus are distinguished by cheeks covered with scales and lips with papillae,respectively.Our phylogenetic tree and morphological characters support Traccatichthys as a valid genus,which can be distinguished from Micronemacheilus by anterior and posterior nostrils closely set(vs.clearly separated).Four species are placed in Traccatichthys.

草海云南鳅的基础生物学研究

2016年7月和2017年3月,在草海国家级自然保护区水质保持相对较好的阳关山共采集了408尾草海云南鳅(Yunnanilus caohaiensis),对其基础生物学进行了初步研究。结果表明,草海云南鳅的年龄组成为0^+～5龄,其中0^+～2龄占比较大,是该种群的优势年龄组。草海云南鳅的绝对繁殖力最大为197粒,平均绝对繁殖力为142粒;相对繁殖力最大为102粒/g,平均相对繁殖力为99粒/g。云南鳅的雌雄性比近似等于1∶5,为保护草海鱼类物种多样性,应加强对草海云南鳅的保护。