Nyctosaur sister taxa?

[David Peters <davidrpeters@earthlink.net>]

Chris Bennett wrote:

The crest of Nyctosaurus has the "finished appearance" refered to above,
but
of course nyctosaurs are not at all closely related to the clade
(Istiodactylus (Ornithocheiridae + Pteranodontidae)) despite what Dave
thinks.


If not Pteranodon, which pterosaurs are the closest known sister taxa to
Nyctosaurs ~ and why?

I think Dave U. might be right this time.  : )

David Peters
St. Louis