Re: Coronosaurus, new ceratopsid genus for Centrosaurus brinkmani

[Mike Keesey <keesey@gmail.com>]

On Thu, Nov 8, 2012 at 11:15 PM, Tim Williams <tijawi@gmail.com> wrote:
>
> Yes, _Archosaurus_ is now considered a basal archosauriform, but not
> an archosaur (sensu stricto).  Nesbitt (2011) recovered it as a
> proterosuchid.
>
> Outside of Archosauria (way outside), another example of a genus named
> after a similar-named higher taxon is the fossil prototherian
> _Monotrematum_, originally assigned to the Monotremata.
> _Monotrematum_ is now often considered a junior synonym of
> _Obdurodon_.  But if Monotremata is limited to the crown clade
> (_Ornithorhynchus anatinus_+_Tachyglossus aculeatus_), and
> _Obdurodon_/_Monotrematum_ lies outside of this clade (as some
> phylogenies have proposed), then the genus _Monotrematum_ would not
> belong in Monotremata.

Archosaurus is still in pan-Archosauria and Monotrematum is still in
pan-Monotremata, in any event.



--
T. Michael Keesey
http://tmkeesey.net/