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On Sibley and Ahlquist's comments concerning weird ducks and other
problematic taxa, Matt Troutman asked...
> Certainly you aren't talking about _Anseranas_, which I believe they
> found to be allied with screamers. I could be wrong, though.
Yes, Sibley and Ahlquist allied the magpie goose with the screamers
(as Anhimoidea if memory serves): Mourer-Chauvire and Feduccia have
(independently) done likewise. I strongly disagree with this
proposal. The aberrant anseriform I was referring to (i.e., a taxon
often said to 'have no close relatives') was actually _Stictonetta_.
Sibley and Ahlquist (1990) found it to be the sister to anserines +
anatines, whereas of course Olson and Feduccia, among others, have
regarded it as one of the most basal of all anseriforms. I believe
Jonsgard specifically states that _Stictonetta_ 'has no close
Cladistic studies of anseriforms find _Stictonetta_ to be an anatid,
and specifically the sister to the tadornine + anatine clade. For in
depth discussion see Livezey (1996): Phylogenetic reassessment of the
tadornine-anatine divergence. Don't have the ref with me.
"Kill them. Kill them all"