The Genus Xiphophorus in Mexico and Central America
The Genus Xiphophorus in Mexico and Central America
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DOI：
10.1089/zeb.2006.3.271
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发表时间：
2006-01-01
期刊：
影响因子：
2
通讯作者：
Kazianis, Steven
中科院分区：
文献类型：
--
作者：
Kallman, Klaus D.;Kazianis, Steven
剑尾鱼属分布于墨西哥东北部（科阿韦拉）约2200公里远至洪都拉斯。有26种，其中21种占据了马德雷山脉东方东坡和继续科迪勒拉到东南部的源头。事实上，所有的物种都在有限的范围内生活，通常是在穿越喀斯特地区的河流中，这些河流与低地河流被地下通道隔开。只有沿海平原的三种形态分布较为广泛。19个分类群出现在墨西哥跨火山带400公里内，表明该属可能在该地区进化。在许多地方，两个种是同域分布的，但自然杂交种只在三个或四个地点被发现。已经确定了四个单系群：北方的扁尾鱼群和北方的剑尾鱼群，位于墨西哥跨火山轴的北部，以及南部的helleri和Clemenciae剑尾鱼群。这三种南方扁尾虾的地位仍然没有得到解决，不同群体之间的系统发育关系仍然没有完全了解。
The genus Xiphophorus is found from northeastern Mexico (Coahuila) for about 2200 Km as far as Honduras. There are 26 species, of which 21 occupy headwaters on the eastern slope of the Sierra Madre Oriental and continuing Cordillera to the southeast. Virtually all the species in the headwaters occupy limited ranges, often in rivers traversing karst country that are separated from lowland streams by underground passages. Only the three forms in the coastal plain are more widely distributed. Nineteen taxa occur within 400 Km of the Mexican Trans Volcanic Belt, suggesting that the genus may have evolved in this region. In many localities two species are sympatric, but natural hybrids are only known from three or four sites. Four monophyletic groups have been identified: the northern platyfish and the northern swordtail groups, north of the Mexican Trans Volcanic Axis, and to the south the helleri and the clemenciae swordtail groups. The status of the three southern platyfish is still not resolved and the phylogenetic relationship of the different groups to each other is still not fully understood.