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Thunder Lizard size comparison by ScottHartman Thunder Lizard size comparison by ScottHartman
Does what it says on the bottle. I did a write up on some details on my Facebook page here: [link]

I assume there will be lots of questions about scaling and which specimens I've used, so I'll see you in the comments section below.

Update: Added a gray silhouette of the mexican Alamosaurus specimen, and changed some of the scale people for more variety.
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:icon3dconcepts:
3DConcepts Featured By Owner Jul 31, 2017
Amazing work!
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:iconiranosaurus:
Iranosaurus Featured By Owner Jun 8, 2017
Hi mr hartman im mehdi from a highschool in iran im so interested in paleontology. i have a question: who was the last diplodocid on earth?when did it live? and why diplocids disapeared long befor the extinction of brachiosaurids(including titanosaurs)?was it because of advantages that brachiosaurs have against predators and other sauropods?
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:iconpaleosir:
paleosir Featured By Owner Sep 29, 2017  Hobbyist Traditional Artist
I´m not Hartman but I think I can answer some of your questions.
The question of what was the largest diplodocid is a bit tricky because many of the supposed giants are very incomplete and therefor come with uncertainty. The biggest might have been Barosaurus which may have reached up to 40 to 55 meters long and maybe over 100 tonnes. If this is true it would leave other diplodocids far behind in size, except maybe Apatosaurus. Apatosaurus might have gotten really big when it was an adult, because the biggest specimens were not mature. 

The last diplodocid... maybe the undescribed kirkwood diplodocid?

Their extinction may have been due to changing plant life, or maybe just chance. 
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:iconilikeurpaleoart:
ILikeUrPaleoArt Featured By Owner Mar 16, 2018
Is OMNH 1670 an adult?
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:iconanimalme:
Animalme Featured By Owner Edited Nov 12, 2016  Hobbyist Digital Artist
That guy seems really happy to be with those dinosaurs.

"Yes! The time machine worked, I can finally see these beautiful prehistoric animals in-" *SQUISH*
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:iconfranoys:
Franoys Featured By Owner Edited Aug 21, 2016  Student Digital Artist
Is J berlin's giraffatitan? If so and from what I can tell Puertasaurus and Alamosaurus aren't much bigger than it in linear dimensions? I'm confused right now xD

Having alredy said that; I'm curious on how argentinosaurus would compare to these. What's your take in argentinosaurus size?
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:iconspinosaurus14:
Spinosaurus14 Featured By Owner Mar 9, 2016
How big would be argentinosaurus?
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:iconamethyst2016:
Amethyst2016 Featured By Owner Mar 11, 2016  Student Traditional Artist
35m long.
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:iconspinosaurus14:
Spinosaurus14 Featured By Owner Mar 15, 2016
Yeah, but the reconstructions which give argentinosaurus a lengh over 30 meters are outdated.
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:iconscotthartman:
ScottHartman Featured By Owner Mar 17, 2016  Professional Digital Artist
I do have an answer to that, but it will have to wait for an upcoming paper!
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:iconstuchlik:
Stuchlik Featured By Owner Mar 24, 2016
This paper will be in this month/this year ? or around when ? :D
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:iconscotthartman:
ScottHartman Featured By Owner Apr 2, 2016  Professional Digital Artist
This year.
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:iconspinosaurus14:
Spinosaurus14 Featured By Owner Nov 5, 2016
What's with the paper now?
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:iconfalcolf:
Falcolf Featured By Owner Nov 13, 2015  Professional General Artist
These diagrams are really cool :D it may sound weird, but I didn't realize that their necks were that thick. Now I know! :)
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:iconthedinorocker:
thedinorocker Featured By Owner Sep 14, 2015
Hi Mr Hartman, Someone t old me you have an Argentinosaurus skeletal ready to show in future, so Will you update this parade with the south America giant?
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:iconscotthartman:
ScottHartman Featured By Owner Sep 15, 2015  Professional Digital Artist
Yes, and yes.
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:iconthedinorocker:
thedinorocker Featured By Owner Sep 15, 2015
That Will be a Great day!
I saw a replica of the vertebral material back in 2000Idontremember and was Huge, probably in the range of biggest Alamosaurus (I think)....
Moreover there are very few good Argentinosaurus restoration out there and I m sure your skeletal Will be a Great reference for many artist (as usual).
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:iconmajestic-colossus:
Majestic-Colossus Featured By Owner Mar 29, 2017
Still waiting :( (Sad)  
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:iconthediremoose:
thediremoose Featured By Owner Apr 10, 2015
I wonder what we should call the OMNH monstrosity in light of Tschopp's findings. Probably "Apatosaurinae i.s." for now.
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:icontheomnivore:
TheOmnivore Featured By Owner Apr 7, 2015
Good news, everyone! Brontosaurus might be valid again! peerj.com/articles/857/
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:iconscotthartman:
ScottHartman Featured By Owner Apr 7, 2015  Professional Digital Artist
Good to see this finally get published. Yes, there's probably a decent argument for Brontosaurus (now that it's in the clear to talk about it).
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:iconarchanubis:
Archanubis Featured By Owner Apr 10, 2015
Wondered if you had heard about that.  Do you plan on creating a skeletal reconstruction of Brontosaurus (assuming the reclassification sticks)?
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:iconscotthartman:
ScottHartman Featured By Owner Apr 10, 2015  Professional Digital Artist
Assuming their phylogeny holds I've already done a Brontosaurus skeletal reconstruction.
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:iconthedinorocker:
thedinorocker Featured By Owner Mar 21, 2015
Hi Mr Hartman how are you?
after a lot of work and a interesting discussion with Mr Wedel I had finished a work on Sauroposeidon...
Can I send it to you for having your thoughts?

thank you
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:iconscotthartman:
ScottHartman Featured By Owner Mar 21, 2015  Professional Digital Artist
Sure, I'll take a look.
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:iconthedinorocker:
thedinorocker Featured By Owner Mar 23, 2015
Thank you !
I Will send it to your email
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:iconsilverdragon234:
SilverDragon234 Featured By Owner Feb 17, 2015
Ah, sauropods - the most gentle of giants :)
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:iconthediremoose:
thediremoose Featured By Owner Apr 10, 2015
I wouldn't be so sure. Most large herbivores today aren't all that gentle; there's no reason to assume sauropods were either.
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:iconsilverdragon234:
SilverDragon234 Featured By Owner Apr 10, 2015
Only when solitary bulls are in musth
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:iconjaynapavlin:
JaynaPavlin Featured By Owner Oct 13, 2014  Professional Digital Artist
the scale of these beasts, just amazing
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:iconscotthartman:
ScottHartman Featured By Owner Oct 29, 2014  Professional Digital Artist
Agreed, it's completely beyond what we are used to in our day to day experience.
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:iconasadsademochic:
ASadSadEmoChic Featured By Owner Sep 24, 2014  Hobbyist Writer
That little guy there looks very excited to be standing if front of a bunch of dinosaurs. xD
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:iconvincenangellis:
VincenAngellis Featured By Owner Aug 1, 2014
Nice...
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:iconturtleosaurus:
Turtleosaurus Featured By Owner Jul 21, 2014
Cool thanks for reply
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:iconturtleosaurus:
Turtleosaurus Featured By Owner Jul 16, 2014
Cool comparison. But why is your Brachiosaurus taller than the Giraffatitan as my understanding is that Giraffatitan is taller based on Paleo-king's reconstructions. Cool work when are you going to put up Guanlong reconstruction looking forward to it.
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:iconscotthartman:
ScottHartman Featured By Owner Jul 19, 2014  Professional Digital Artist
You'd have to ask him that. Anyhow, they're essentially identical in height - Giraffatitan has a more upright back, but its torso is longer. Brachiosaurus seems to have a back that is less upright, but it's torso is longer and the shoulder blades are longer. Either one could be made "taller" by craning the neck up more at the base, but I pose mine close to a neutral pose (I say "close" because in these taxa there isn't good enough data to establish the exact ONP, so I base it on their closest relatives that I can).
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:icontascalo:
tascalo Featured By Owner Jun 30, 2014  Hobbyist Photographer
awesome!
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:icondarklord86:
darklord86 Featured By Owner Mar 17, 2014
Awesome!
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:iconmark0731:
mark0731 Featured By Owner Mar 14, 2014
Nice but in the facebook you wrote Argentinosaurus is a little bit smaller than Puertasaurus, but I'm think it is a little bit larger, because the maximum size of Argentinosaurus is 35 m, while Puertasaurus is 30 m.
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:iconscotthartman:
ScottHartman Featured By Owner Mar 14, 2014  Professional Digital Artist
My point is that I don't believe any estimate for Argentinosaurus until I restore it, and from my initial workup it doesn't look like it will be that large - length estimates from the web (and even peer-reviewed papers) are notoriously bad. But we'll see (if it gets chosen).
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:icontascalo:
tascalo Featured By Owner Feb 15, 2014  Hobbyist Photographer
Wow!
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:iconscotthartman:
ScottHartman Featured By Owner Mar 14, 2014  Professional Digital Artist
Thanks :)
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:iconthedinorocker:
thedinorocker Featured By Owner Jan 27, 2014
It s pretty fun there is both one oversized Diplodocus and Apatosaurus
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:iconscotthartman:
ScottHartman Featured By Owner Jan 28, 2014  Professional Digital Artist
FWIW there's actually more than one giant apatosaur floating around out there, but the others haven't been published on yet. To my knowledge Diplodocus has only the one specimen (which was the one originally named Seismosaurus).
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:iconthedinorocker:
thedinorocker Featured By Owner Jan 29, 2014
So probably a new species of Apatosaurus or only fully grown specimens I suppose...
I really in trip with "Seismosaurus", the Diplodocus genus is interesting for me 
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:icondinobatfan:
dinobatfan Featured By Owner Aug 15, 2013  Professional General Artist
This is a pretty incredible display grouping here! It's good to see the comparison. Has Brachiosaurus brancai now been officially accepted as Giraffatitan brancai now as per Gregory S. Paul?  I knew he had put forth the proposed name change, but I haven't heard whether it's been accepted officially or not. Your mention of it here is the first I've heard anyone use it other than Gregory Paul.
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:iconthedinorocker:
thedinorocker Featured By Owner Aug 22, 2013
Yes, now for the majority the african brachiosaur species is regarded as a differenti genus, called Giraffatitan.
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June 14, 2013
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