How solid are the arguments they bring up to ally it
with Protopteryx (and as per Theropod DB,
_Cuspirostrisornis_ and _Noguerornis_ ->
Protopterygidae)?
It is probably not the same as *Protopteryx*, to which it is apparently
quite similar... but almost all of the characters emphasized in the abstract
(and elsewhere) are plesiomorphic and/or indicative of immaturity.
It is most likely an "enantiornitine" bird in any case (spelled correctly
everywhere except in the title and the running head).