>Tom DiBenedetto wrote: >>Nelson developed an approach to identifying potential reticulation on >>cladograms in the late seventies or early eighties (SysZoo I think) oops, shame on me,,,,the ref is: Nelson G, 1983. Reticulation in Cladograms. in Advances in Cladistics, vol.2 Platnick and Funk eds. Columbia Univ. Press