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XENICIBIS & RHABDOMORPHA
On possible quadrupedalism in theropods, Mickey M wrote....
> Then there's Xenicibis, the supposedly facultatively quadrupedal ibis.
Having spoken about this at length with Nick Longrich I no longer
think it likely that the club-like swollen carpometacarpi of _Xenicibis_
were used as walking props (as proposed by Storrs Olson - I do not
have the ref to hand). Nick spent ages playing with the things and a
couple of features seen in the _Xenicibis_ wing skeleton are also seen
in birds which use their carpometacarpi as weapons (e.g. _Tachyeres_).
Can't give away all the details as this has yet to be published.
Ruiz-Omenaca, J. I. 2001. _Dinosaurios hipsilofodontidos
(Ornithischia: Ornithopoda) en la Peninsula Iberica_. Colectivo
Arqeologico-Paleontologico de Salas, C.A.S., pp. 266.
Extensive description (in Spanish) of the small Iberian ornithopods.
Includes new _Othnielia_-like form from Spain and much dryosaurid
and _Hypsilophodon_-like material from Portugal and Spain.
_Alocodon_ is reinterpreted as a thyreophoran and _Trimucrodon_ is
regarded as a heterodontosaur. _Taveirosaurus_ had been identified by
Antunes and Signogneau-Russell (1991) as a pachycephalosaur but it
seems there's a 1996 paper where they reidentify it as a possible
nodosaurid (Pereda-Suberbiola also suggested in 1999 that it was a
juvenile nodosaurid). The term 'rhadbomorphans', for
_Muttaburrasaurus_, _Tenontosaurus_ and _Rhabdodon_, is widely
used in this work - this follows an unpublished study (1997) and an
abstract (1999) written by M. Pincemaille. I suppose this is the first
time it's made it into the wider literature (does anyone know better?).
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