| genes meet geology: fish phylogeographic pattern reflects ancient, rather than modern, drainage connections. | we used dna analysis of the freshwater galaxias vulgaris complex (pisces: galaxiidae) to test a geological hypothesis of drainage evolution in south island, new zealand. geological evidence suggests that the presently north-flowing nevis river branch of the clutha/kawarau river system (otago) once flowed south into the nokomai branch of the mataura system (southland). the flow reversal is thought to have resulted from fault and fold activity associated with post-miocene uplift. mitochondrial dna ... | 2001 | 11681739 |