A new paper by Hollingsworth et al. has come out in BMC Evolutionary Biology that provides the most complete phylogeny to date of North American minnows.
Hollingsworth, P.R. Jr., A.M. Simons, J.A. Fordyce, and C.D. Hulsey. 2013. Explosive diversification following a benthic to pelagic shift in freshwater fishes. BMC Evolutionary Biology. 13:272.
The article is open access: