Re: Tyrannosauridae

[Paleo_Mont <paleo_mont@excite.com>]

2. Yes Gorgosaurus is back. see T.Holtz, "Mesozoic Life" That is one
publication saying its back... cant give the exact page and numbers cause my
book is under a pile of some more books and i dont feel like digging it out.
Also think another publication on the way out, or somewhere to that may say
something similiar.
um how do they differ. I think one is judithian, the other is Two med. also
i think the gracile and robust skeletal bodies is part of it as well. that
info is also in a book in the same pile. 

judith river formation:
_Albertasaurus sarcophagus_'Flesheating lizard from Alberta'
(nice name) 

two medicine formation:
Gorgosaurus liberatus  not sure on the name there. 

Not a huge Tyrannosauridae fan so this is what i can rember. not sure if its
all right if its not i am sure Tom Holtz will let me know or someone else.

cheers, 
k.wicks








On Sun, 9 Dec 2001 00:25:16 +0100, david.marjanovic@gmx.at wrote:

  Search the archives www.cmnh.org/fun/dinosaur-archive for more precise
answers, as all these questio
  ns have been discussed repeatedly at length.
  
  > 1.) Is _Siamotyrannus_ real member of T-dae family?
  
  Probably it is a sinraptorid instead.
  
  > 2.) Is _Gorgosaurus_ considered a valid genus?
  
  By many. Depends on the still unresolved phylogeny.
http://dev.tolweb.org/tree?group=Tyrannosauridae
  &contgroup=Tyrannosauroidea&dynnodeid=12613
  
  > And if so, how does it differ from _Albertosaurus_?
  
  Both *Gorgosaurus* and *Albertosaurus* consist of one species each; that
the species are different h
  as not been questioned so far, I think.
  
  > 3.) How are distinguished members of Tyrannosaurini taxon from less
  > advanced tyrannosaurids?
  
  I think Tyrannosaurini is the most recent common ancestor of
*Daspletosaurus torosus* and *Tyrannosa
  urus rex*? Has it got a published definition at all?
  This taxon is not mentioned at
http://dev.tolweb.org/tree?group=Tyrannosauridae&contgroup=Tyrannosau
  roidea&dynnodeid=12613, so I can't find its supporting characters.
  
  > 4.) Is _Jenkhiskhan_ the same as _Tarbosaurus_?
  
  *Jenghizkhan*? Yes.
  
  > 5.) Was "T. rex" a scavenger or an agile hunter?
  
  Quite an agile hunter, able to run fast. Being a terrestrial scavenger
seems to be impossible.
  
  **************************************
  The phylogenetic analysis raises more problems than it solves, but
exposing these new problems may s
  timulate the search for the missing answers.
  on p. 1245 of
  Michel Laurin & Robert R. Reisz: A new study of *Solenodonsaurus
janenschi*, and a reconsideration o
  f amniote origins and stegocephalian evolution, Canadian Journal of Earth
Sciences 36, 1239 -- 1255
  (1999)
  


K.Wicks
Paleo Mont - www.geocities.com/paleo_mont
Paleo Mont Park - www.geocities.com/paleo_montpark





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