A simplified phylogeny of <i>Astyanax</i> showing the relationships of the populations discussed herein[17], [20].

Abstract

<p>The thick lines represent the subterranean phases of the cave lineages. Node A was estimated to be 6.7 mya <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0079903#pone.0079903-OrnelasGarcia1" target="_blank">[17]</a>. No dating is available for the other nodes, except that node D is more recent than node C.</p