Iguanodontidae and Theropod Boredom

["Jaime A. Headden" <qilongia@yahoo.com>]

  Sorry, but this list does seem to get a little focused around
theropods, despite the diversity of ornithischians outstripping
theropods in both number and diversity....

  Yet little is done on them....

  Anyway, for a non-theropod topic, I thought it might be
interesting to explore what we could of iguanodontid
relationships, both general to Iguanodontia (*Hypsilophodon* +
*Iguanodon*) and specifically.

  Several taxa are involved, including:

  *Iguanodon* (various species)
  *Altirhinus kurzanovi*
  *Probactrosaurus gobiensis*
  *Ouranosaurus nigeriensis*

  Some hypotheses argue that these taxa form a monophyletic
Iguanodontidae, others that they form a serial relationship to
hadrosaurs, with many agreeing that *Probactosaurus* is a
hadrosaur or next sister group, or with a diphyletic hadrosaurid
grouping. *Ouranosaurus* is regarded as a possible
hadrosaur-like iguanodont.

  The species of *Iguanodon* also seem to be under contention:
*I. hoggi* was proposed as a possible camptosaurid (Norman,
1999, _JVP_ 19(3); SVP-Denver), and *I. bernissartensis* and *I.
atherfieldensis* were conspecific but regional variations, or
even genders of each other. I would like to open this thread in
the hopes of stimulating further discourse on our non-theropods
so that those on the list who work on non-theropods (especially
ornithischians) will not be desensitized to it.

  And is there anyway we can have a thread on sauropods that
doesn't involve some historical they were
landwalkers-not-swimmers idea or anything about their necks... :)

=====
Jaime A. Headden

  Aaaaaaaaaaaaaaaaaaaahhhhhhhhhhhhhhhhhhr-gen-ti-na
  Where the Wind Comes Sweeping Down the Pampas!!!!

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