Re: Tyrannosauroids Imploding Further

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

  As I said, the phylogeny is prone to change, and now is no exception. I
made an oversight in listing "two" species of *Stokesosaurus,* wherein is
confused the name with *Sarcosaurus andrewsi,* but not the species
identity itself. In fact, to further confuse this, the very species I had
in mind I listed right before hitting send, *Aviatyrannus jurassica,*
which was based on the ilium that I considered to be "Stokesosaurus
andrewsi." Taxa based on ilia are silly.

  A note on the species mentioned, however:

  There is an extensive faunal similarity between Guiamarota and Morrison
constituents ... *Dinheirosaurus* resembles ever increasing new species of
diplodocine diplodocids, *Lourinhasaurus* is either a camarasaur similar
to *Camarasaurus* or an apatosaurine diplodocid similar to *Apatosaurus*
(I also deem that *Seimsomosaurus* has a pelvis more in agreement with
apatosaurs than diplodocs), *Draconyx* is a camptosaur (I agree with
Mateus [and he with me], it really is a cool name, even if the material is
rather scanty), there is cf. *Ceratosaurus* and cf. *Torvosaurus*
material, and now small "tyrannosauroids" with virtually identical ilia
differing in some proportional qualities and the inclination of the
supraactabular ridge (otherwise, these would be the same "genus" for
others like Wagner [if he cared], Mike Keesey, or myself, who think that
if an available "morphotaxon" is available, use it). It's no wonder to
question "generic" separation, and this led to my using that species name
at the time, then later forgetting about *Aviatyrannus* (in more ways than
one) and subsequently adding it and hitting send. Pardon for the
confusion.

  Here's the new tree:

--Tyrannosauroidea
  `--+--Dilong paradoxus
     `--+?-Iliosuchus incognitus
        |?-Stokesosaurus clevelandi
        |?-Aviatyrannus jurassica
        |--Eotyrannus lengi
        `--Tyrannosauridae
           |--Albertosaurinae
           |  |--Albertosaurus sarcophagus
           |  `--Gorgosaurus libratus
           `--Tyrannosaurinae
              `--+--Daspletosaurus torosus
                 |?-`--Daspletosaurus n. sp.
                 `--+--Tarbosaurus bataar
                    |  incl. Shanshanosaurus, var. Asian "spp."
                    |?-Alioramus remotus (syn. T. bataar?)
                    `--Tyrannosaurus rex
                       incl. Nanotyrannus
                             Stygivenator
                             Dynamosaurus
                             Dinotyrannus

  Cheers,

=====
Jaime A. Headden

  Little steps are often the hardest to take.  We are too used to making leaps 
in the face of adversity, that a simple skip is so hard to do.  We should all 
learn to walk soft, walk small, see the world around us rather than zoom by it.

"Innocent, unbiased observation is a myth." --- P.B. Medawar (1969)


                
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