How large is MOR 008?

2 min read

Deviation Actions

SpinoInWonderland's avatar
Published:
61 Comments
13K Views
UPDATE(7/4/2016): Even this may be a bit too large. MOR 008's maxilla and dentary measurements from the Theropod Database suggests that, based on AMNH 5027, MOR 008 was around ~11.97-12.22 meters long and ~6.26-6.66 tonnes in mass (taking a mass figure of ~6 tonnes for AMNH 5027). Not only it is now even further from the mass of FMNH PR2081 than I thought before, it's turns out that it doesn't even grab a length advantage.

Not as large as many Tyrannosaurus fans think it is.

The ~1.5-meter reconstructed skull seems to be exaggerated, reconstructing it like a normal Tyrannosaurus skull actually gets it down to ~1.34 meters from snout to the quadratojugal.



It appears that :icondrscotthartman: agrees with this: comments.deviantart.com/1/1241…

So how large is this specimen? Well, it is pretty similar to AMNH 5027(they were both assigned to "Tyrannosaurus X"), so it seems to be a good base to use.

And here's the result:



It's still one of the largest known Tyrannosaurus specimens, but due to it's more gracile build, still smaller than FMNH PR2081.

Credits:
:icondrscotthartman::iconblazze92:
© 2013 - 2021 SpinoInWonderland
Comments59
Join the community to add your comment. Already a deviant? Log In
Toostig's avatar
Maybe this is just me being ignorant but don't we get an answer of 6.767,8 to 7.200,7 kgs for MOR 008(average of 6.984,3 kgs) when scaling from Hartmans model for AMNH 5027? 
SpinoInWonderland's avatar
This post is old and needs some revision.
Migatte's avatar
Nice post! I am trying to deal with someone on Dinopedia that FMNH PR 2081/and or Trix are the largest T. rex specimens.
mark0731's avatar
Trix was probably a bit lighter than Sue.
Migatte's avatar
True, but generally those two are likely the largest specimens in the sample size.
PCAwesomeness's avatar
I was actually hyped to see a tyrannosaur seemingly longer than Sue until I read the update.

Cool, though.
kirkseven's avatar
it appears that Wikipedia is catching up with you.

BTW shouldn't the corrected version be 139.7 cm?
assuming the pixel count is correct as well as the 150cm figure
SpinoInWonderland's avatar
Did Wikipedia just cite me?
kirkseven's avatar
It cited this page.
SpinoInWonderland's avatar
I thought they had a policy against "original research"...
kirkseven's avatar
Well its Nice to see Wikipedia using a legit estimate for once :)
(yours)

Also what do you mean by original reaserch?
SpinoInWonderland's avatar
"Original research" in Wikipedia essentially means "unofficial sources" IIRC.
SpinoInWonderland's avatar
The scaling was off, but correcting it doesn't lend any support towards the old exaggerated estimates. It's actually even smaller than the estimate I came with here back then.

The Theropod Database has measurements of it's maxilla and dentary (~72 centimeters and ~88 centimeters respectively) which show that the skull wasn't even that big compared to that of AMNH 5027 (~71-centimeter maxilla, ~85-centimeter dentary).

The maxilla and dentary measurements, based on comparison with AMNH 5027, suggests total lengths of ~11.97-12.22 meters.
kirkseven's avatar
SpinoInWonderland's avatar
It's Spinodontosaurus' own scaling of MOR 008 based on the "corrected" version.
kirkseven's avatar
corrected" version? what do you mean by that?
SpinoInWonderland's avatar
It's the modified skull in the gif above.
kirkseven's avatar
how did the overall body end up slightly longer than your reconstruction?
SpinoInWonderland's avatar
Not everyone gets the exact same measurement. There will be small differences in how it's measured, all that matters is that the results cluster around something.
JonaGold2000's avatar
A friend of mine pointed out a mistake made when making that gif, the other side of MOR 008. As you can see it suggests a shape similar to the unedited skull.
www.google.nl/search?q=mor+008…
Sorry I couldn't find a higher quality picture, most pictures of MOR 008 are of the other side
SpinoInWonderland's avatar
In any case it won't end up as long as the museum skull, the thing's maxilla and dentary aren't even much larger than those of AMNH 5027...
JonaGold2000's avatar
The skull does indeed look suspicious 
Join the community to add your comment. Already a deviant? Log In