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A Re-evaluation of Isoetes savatieri Franchet in Argentina and Chile

机译:对阿根廷和智利的savatieri Franchet的重新评估

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摘要

Isoetes savatieri has traditionally been interpreted as being a uniform aquatic ranging from the southernmost regions of South America to the central Andes of Chile-and Argentina. An examination of herbarium material supports the recognition of two taxa, a southern I. savatieri and a more northern I. chubutiana, from central Chile and Argentina. The latter taxon is hexaploid and described here as a new species. The morphology of these species suggest that they are sister species resulting from divergence following a polyploidy event. These species, and several other species pairs, provide the best and, to date, only examples of allopatric divergence in polyploid Isoetes.
机译:传统上,Isoetes savatieri被解释为一种均匀的水生生物,范围从南美的最南端地区到智利和阿根廷的中部安第斯山脉。对植物标本室材料的检查支持从智利中部和阿根廷识别出两个分类单元,即南部的一类I. savatieri和一个较北部的I. chubutiana。后一个分类单元是六倍体,在这里被描述为一个新物种。这些物种的形态表明它们是多倍体事件后发散的姐妹物种。这些物种以及其他几个物种对,提供了最好的,迄今为止唯一的多倍体等位面异源发散实例。

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