云南石林盲高原鳅的发现及其分类地位的讨论
A New Blind Loach of Triplophysa From Yunnan Stone Forest With Comments on Its Phylogenetic Reiationship
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摘要: 石林盲高原鳅是在我国发现的第四种洞穴条鳅鱼类。其鉴别特征为:眼睛完全退化;体半透明;须发达,鼻瓣延长成须状;体裸露无鳞;背鳍、尾鳍分枝鳍条分别为7和14根;体和尾柄较细长。在摒弃趋同演化特征后,综合形态性状并结合地理分布资料分析的结果表明,类似于南盘江高原鳅的祖先曾广泛分布于滇东南一带,后来随着地下河的发育分别进入个旧卡房笆蕉箐溶洞和石林尾博邑溶洞。在溶洞间的地理隔离作用下,形成了与环境相适应的各自形态特点,最终分别演化成为目前的石林盲高原鳅和个旧盲高原鳅。本文还依据朱松泉的条鳅分类系统,订正了如下2个种;个旧盲高原鳅、湘西盲高原鳅。Abstract: On March 18,1991,the authors collected 2 loach specimens from an underground cave near the famous Stone Forest of Yunnan.It is identified to be a new species,named Triplophysa shilinensis Chen et Yang,sp.nov.,alluding to the type locality Stone Forest (The words "Shi Lin=石林" in Chinese mean Stone Forest).New species and its phylogenetic relationship are described and discussed in the following:Triplophysa shilinensis Chen et Yang,sp.nov.