Re: Dwarf Tyrannosaurs?

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

Larry Febo writes:

<My question....are there any?? Or were these just
determined to be juveniles? In the past year of
crusing the internets Dino websites, and reading the
latest popular books, I find no mention of such
dwarfs.>

1. *Nanotyrannus lancensis* Bakker et al. 1988 (=
"Clevelanotyrannus" informal, Albertosaurus lancensis,
Gorgosaurus lancensis). Possibly juvenile of T. rex,
opinion first proposed by Paul (1988) or earlier (do
not recall). Rear of skull crushed and apparently
pressed forward into the braincase, at least by my
observation, owing to the extremely wide jowls and
probably also the lower roof. Snout compression could
be ontogenetic (owing to youth, changes in age). New
CT scans are/have/will being/been/be done.

2. *Dinotyrannus megagracilis* Paul, 1988 (=
Gorgosaurus megagracilis). Very small specimen also
found to be a possible juvenile of *T. rex.* _Not_
another name for *Nanotyrannus.*

3. *Maleevosaurus novojilovi* (=Gorgosaurus
novojilovi). Possibly small (juve) specimen of
*Tyrannosaurus (=Tarbosaurus) bataar.* Nice lookin'
snout, though.

  The above figure as dwarfs, but there are compelling
reasons to consider them juveniles or subadults. Other
specimens attributed to these genera are similarly
considered juvenile by some, or validating the
taxonomic identity of these genera (barring previous
comments by me and Dr. Brochu). Study continues.

===
Jaime A. Headden

"May I lure us, ere the mote ends us?"

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