> The analysis by Mayr and Clarke (2003), using 148 osteological and soft > tissue characters, found _Opisthocomus_ (hoatzin) to be the sister taxon to > Cariamidae (seriemas). OH NOOOOOOO... Not one MORE totally utterly new and unprecedented hypothesis!!! The ref could be accessible to me, though. :-) Mayr and Clarke... that alone sounds promising...