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Re: nana vs. juvenile rex
I caught the end of the show but I had to watch it with no sound, so I
was utterly confused by this new gracile giant theropod attacking two
two adult T.rexes. It wasn't until the mother rex showed up and
established the correct scale that I realized those were supposed to
be juvenile rexes!
The animation was typically "overanimated" with lots of rocking
back and forth, constant motion that made me dizzy (jar-jar) too much
skin simulation ( jiggling) and really bizarre walk cycles...and of
course TOO MUCH ROARING. The previous episode was a little better. I
did like some of the subtle lip movements of the rex, especially near
the jugal. The poses always favoured a splayed wide stance for that
EXTREME!!! video game posturing. I get a kick out of the bugs flying
in and out of every shot...nice touch!
I saw the whole show with sound later and was happy there was
cautionary language regarding the validity of nano-t.
On Aug 6, 2008, at 4:54 AM, Thomas R. Holtz, Jr. wrote:
From: owner-DINOSAUR@usc.edu [mailto:owner-DINOSAUR@usc.edu]
On Behalf Of Hammer
Sent: Tuesday, August 05, 2008 10:15 PM
Subject: nana vs. juvenile rex
Well, the way Nanotyrannus was animated on tonight's JFC, they made
it appear as a different species from T. rex very strikingly. The
juvenile rex looked like an adult merely "shrank down" -
looked to me as though the legs were not in proportion to
what they should have been in a juvenile and the head
especially was not right ... right?
Precisely. They just took their T. rex model and shrank the
To paraphrase Samuel L. Jackson: "Allometry, motherf**er. Do You
Yes, a T. rex the same mass as a "Nanotyrannus" would look remarkably
like... Nanotyrannus. And this is true regardless of whether they
taxa, the same species, or whatever: Currie has shown that limb
the different tyrannosaurid subgroups are fairly consistent.
So - anyway - what do think?
Ummm... Better luck next episode?
Seriously, this one had less fact checking than the first. The
consistently read "Nanotyrannosaurus" rather than "Nanotyrannus";
for the Cretaceous were off by 10 Myr (they gave it as 135-55
graphics for the teeth were wrong (esp. missing the deep tyrant
"septic bite" argument would hold for all serrated theropod teeth,
uniquely for T. rex; and while the graphics model was good their
step cycle (especially for a run) was way off (it appeared that the
footfalls were further from the midline than while walking, when
footfalls should be in line (that is, closer to the midline than the
are while standing)).
Thomas R. Holtz, Jr.
Email: firstname.lastname@example.org Phone: 301-405-4084
Office: Centreville 1216
Senior Lecturer, Vertebrate Paleontology
Dept. of Geology, University of Maryland
Faculty Director, Earth, Life & Time Program, College Park Scholars
Mailing Address: Thomas R. Holtz, Jr.
Department of Geology
Building 237, Room 1117
University of Maryland
College Park, MD 20742 USA