[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: No Cretaceous placental mammals?
They find _Vegavis iaai_, a Maastrichtian bird from Antarctica, to be
a stem-anatid. This means, at the very least, that pan-palaeognathes,
pan-galliforms, pan-neoavians, pan-anhimids, pan-anatids, and the
_Anseranas_ total group were distinct before the K/Pg boundary. (Also
possibly the _Lithornis_ branch--or is _Lithornis_ considered a
The lithornithids are traditionally considered paleognaths, but a few
analyses, such as Livezey & Zusi's humongous one, have found them (usually
*Lithornis* alone) as the sister-group of Neornithes.
Most bird "orders" of course belong to Neoaves... there were neornitheans in
the Cretaceous, but there may not have been a lot.