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randomdinos — Assorted Megafauna Compilation

#ceratosaurus #smilodon #spinosaurus #stegosaurus #torvosaurus #triceratops #tyrannosaurus #utahraptor #pycnonemosaurus #austroraptor #thalattoarchon #austroposeidon #purussaurus
Published: 2016-10-30 16:51:31 +0000 UTC; Views: 25365; Favourites: 194; Downloads: 104
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Description Yes, I just picked stuff that I liked and put it in a chart.... because why not? 

Left to right;

Smilodon populator - 2.2 m, ~360 kg
Torvosaurus gurneyi - 10.2 m, ~2800 kg (based on skeletal by )
Austroraptor cabazai MML-195 - 6.2 m, ~400 kg (based on skeletal by )
Austroposeidon magnificus - 27.0 m, ~30000 kg (based on skeletal by )
Stegosaurus stenops YPM 1853 - 8.5 m, ~4700 kg (based on skeletal by )
Spinosaurus aegyptiacus MSNM v4047 - 15.0 m, ~6900 kg (based on skeletal by )


Triceratops prorsus MWC 7854 - 8.0 m, ~7000 kg (based on skeletal by Greg Paul)


Utahraptor ostrommaysorum BYU coll. - 5.4 m, ~470 kg (based on skeletal by )
Tyrannosaurus rex FMNH PR 2081 - 12.3 m, ~9100 kg (based on skeletal by )
Thalattoarchon sp. - 13.9 m, ~10000 kg? (based on scaling by )
Ceratosaurus nasicornis BYUVP 12893 - 6.9 m, ~1100 kg (based on skeletal by )
Purussaurus brasiliensis - 10.0 m, ~5000 kg (based on scaling by )


Pycnonemosaurus nevesi - 8.9 m, ~2900 kg


Hatzegopteryx thambema - 10.4 m(WS), ~250 kg (based on skeletal reconstruction by Mark Witton)

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Note that the comments probably have heavily outdated information, since they're all from December 2016 or earlier.
Related content
Comments: 106

randomdinos In reply to ??? [2018-07-12 17:40:53 +0000 UTC]

Existe um meme de Ceratosaurus gigante na internet, mas nenhum fóssil que suporte isso que eu saiba (o maior C.dentisulcatus é BYUVP 12893 com 6.9m, com base no tamanho do crânio comparado com UMNH 5278/UMNH 6329). 

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ApexMegaraptoran In reply to randomdinos [2018-07-13 23:18:19 +0000 UTC]

kkkkk um meme? nem sabia...
Voce conhece algum site ou fonte que mostre o tamanho verdadeiro desses animais? porque na maioria das vezes eles ficam representados bem maiores que a realidade.

👍: 1 ⏩: 1

randomdinos In reply to ApexMegaraptoran [2018-07-14 15:10:26 +0000 UTC]

Acho que não existe nada universal, a Theropod Database (theropoddatabase.com/Alpha%20L… ) tem medidas dos ossos de muitas espécies, mas o comprimento e peso totais não são muito bons (e como o nome diz, só tem terópodes). Geralmente o que eu faço é abrir um artigo sobre o animal com o sci-hub, pegar medidas e comparar com as de um parente que tem uma reconstrução bem feita, mas aí ainda tem o problema de achar o que é uma reconstrução bem feita...

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narcosaurus In reply to randomdinos [2022-07-24 08:14:08 +0000 UTC]

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mark0731 [2018-05-04 09:47:28 +0000 UTC]

Hidden by Commenter

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Toostig In reply to mark0731 [2019-01-06 19:58:22 +0000 UTC]

I do strongly believe he's using Snively's estimation for T.rex.

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JRCthedarkprophet [2018-05-01 02:28:54 +0000 UTC]

I think YPM 1853 is smaller than 8.5 meters. More like 7 meters, at least according to this upload.wikimedia.org/wikipedia…

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randomdinos In reply to JRCthedarkprophet [2018-05-03 03:42:39 +0000 UTC]

I don't know what that's based on, either on pre-Sophie Stegosaurus skeletals or the YPM mount, which is chimeric according to a 2009 thesis.

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rhe416 [2018-02-11 02:02:00 +0000 UTC]

Are Scott Hartman's Tyrannosauruses out of date?

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randomdinos In reply to rhe416 [2018-02-12 02:05:27 +0000 UTC]

No, they're as good as always. I use Franoys's because we often work together on stuff.

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rhe416 In reply to randomdinos [2018-02-12 02:14:23 +0000 UTC]

ok  

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Mesozoic0906 [2017-12-04 04:00:22 +0000 UTC]

Hmm.. Why hasn’t this update noted in my notification?

👍: 0 ⏩: 1

randomdinos In reply to Mesozoic0906 [2017-12-05 14:50:50 +0000 UTC]

It's possible to update without notifying your watchers (or ninja updating, as Franoys calls it).

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PCAwesomeness [2017-11-12 16:19:10 +0000 UTC]

Looks nice!

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vasix [2017-11-04 11:51:46 +0000 UTC]

*Comes back for comments now that it's updated...Austroposeidon...27 m, 33 tons...wow, it weighs virtually nothing!

👍: 0 ⏩: 1

randomdinos In reply to vasix [2017-11-06 16:07:34 +0000 UTC]

And this was from convex-hull Patagotitan, so if I am to be consistent it's going to go down to like 30 t xD

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vasix In reply to randomdinos [2017-11-07 01:58:04 +0000 UTC]

O NOES 

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AndreOF-Gallery [2017-10-30 00:50:42 +0000 UTC]

Austroposeidon entrou no projeto verão e emagreceu 20 toneladas para curtir a praia no fim do ano

👍: 1 ⏩: 1

randomdinos In reply to AndreOF-Gallery [2017-10-30 01:25:34 +0000 UTC]

UAHEUAHUEHAUHEUAHEUHAEHAUHE

Queria emagrecer nessa velocidade, viu, amanhã eu já taria anoréxico...

👍: 0 ⏩: 1

AndreOF-Gallery In reply to randomdinos [2017-10-30 01:43:00 +0000 UTC]

Qual seria o segredo

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acepredator [2017-10-25 05:09:42 +0000 UTC]

Why is that human sanding in front of all those animals?

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Majestic-Colossus [2017-10-22 02:09:35 +0000 UTC]

~150cm tall croc?!

👍: 1 ⏩: 1

randomdinos In reply to Majestic-Colossus [2017-10-22 14:32:48 +0000 UTC]

High-walking Purussaurus is spooky.

👍: 1 ⏩: 0

Franoys [2017-10-22 01:06:52 +0000 UTC]

Nice update, although a bit ninja xD

👍: 0 ⏩: 1

randomdinos In reply to Franoys [2017-10-22 14:32:29 +0000 UTC]

xD Indeed.

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Majestic-Colossus [2017-05-02 23:03:01 +0000 UTC]

Is Austroposeidon about the same size as Futalognkosaurus?

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randomdinos In reply to Majestic-Colossus [2017-05-05 02:04:58 +0000 UTC]

I once thought so, but now it seems Austroposeidon is smaller (I'm not sure, though).

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Majestic-Colossus In reply to randomdinos [2017-05-05 16:40:50 +0000 UTC]

Considerably smaller or just a bit? I guess it was around ~22m long

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randomdinos In reply to Majestic-Colossus [2017-05-06 21:24:46 +0000 UTC]

I believe it's about that big as well, but got less than 19m if I remember correctly.

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Majestic-Colossus In reply to randomdinos [2017-05-06 23:05:39 +0000 UTC]

Thanks. I just checked out his Austroposeidon, and it appears to be around 24-25m not under 19m. I think 22m is a good guess so far.

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Kester14 [2017-01-15 12:10:09 +0000 UTC]

which skeletal did you used on that triceratops.

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randomdinos In reply to Kester14 [2017-01-15 20:18:59 +0000 UTC]

Scott Hartman's with the largest skull by GAT

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vasix [2017-01-03 11:45:07 +0000 UTC]

Well damn...anyway I did an article some time back on some gigantic Helicoprion tooth whorls after speaking to Jesse B. Pruitt (one of the authors of the new research, two huge tooth whorls from Idaho) and he gave me an estimate of 10-12 meters for the animal. Included it all in here=www.eartharchives.org/articles… with the specimen designations as well...although you could speak to either Pruitt or Tapanila yourself if you'd like, seeing as I stupidly haven't included the actual research there grr

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randomdinos In reply to vasix [2017-01-04 02:58:34 +0000 UTC]

oh damn, that is huge, and not the first time I've been linked to that source... perhaps I'll remake this thing.

👍: 0 ⏩: 2

105697 In reply to randomdinos [2017-01-08 16:58:22 +0000 UTC]

And you doubted the 12 meter estimates.

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vasix In reply to randomdinos [2017-01-04 04:32:56 +0000 UTC]

pristichampsus.deviantart.com/… this is where I got it, from Tim's page...aaand then this-www.deviantart.com/users/outgo…

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JonaGold2000 [2016-12-04 00:41:24 +0000 UTC]

fuck it

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kirkseven [2016-11-26 03:24:42 +0000 UTC]

how long was the humerus of the Saurophaganax on the image?

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randomdinos In reply to kirkseven [2016-11-26 14:21:56 +0000 UTC]

a bit on the high side (the average estimate is 48.5 cm, I think mine was 49-50)

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kirkseven In reply to randomdinos [2016-11-26 17:11:03 +0000 UTC]

Oh alright I'm just happy you didn't go with the 54.5 cm estimate. (it's almost certainly wrong)

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Ceratopsia [2016-11-06 02:03:12 +0000 UTC]

All of the Megafauna!

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acepredator [2016-11-05 17:40:55 +0000 UTC]

That human should follow the example of the other Pleistocene giant and run away.

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ForbiddenParadise64 [2016-11-03 10:21:59 +0000 UTC]

Nice. What's Austroposeidon supposed to be though? And that's an exceptionally low estimate for BYU Barosaurus. How did you come to these conclusions, may I say?

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randomdinos In reply to ForbiddenParadise64 [2016-11-03 12:34:26 +0000 UTC]

Nobody knows Austroposeidon... :/
It's a Late Cretaceous lithostrotian from Brazil, nested right outside Lognkosaurs phylogenetically, and as for its dimensions, there it is.

Well, for references' sake, I like minimalistic mega-crypto-diplodocids and I cannot lie. I applied sauropod neck allometry to a Barosaurus scaled to 178% larger and divided 15m (the total length estimate for the neck asduming BYU 9024 is a c11) by the result.

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ForbiddenParadise64 In reply to randomdinos [2016-11-08 19:20:13 +0000 UTC]

Not to say it isn't an interesting critter, it does seem like a creature that wiuld be distinct like that.

Nice Mixalot reference . I'm not the biggest fan of minimalism myself, as it produces the unusually low estimates of GSP and such. C11's a possibility, but it still seems that C9 is the most likely bone, and considering this bone is 1385mm long-even longer than Sauroposeidon's, it does seem too big to belong to something only 38 tonnes. Even using the lowest possible isometric scaling, Taylor came up with 45m long and a weight of 70.5 tonnes (excluding increased proportional robustness of course) for a 15m neck, which is about the same as the neck of M. sinocaradorum, which had proportionally longer neck than any Diplodocid by far and it weighed much more than 40 tonnes. I'm aware that sauropods often have proportionally longer necks when larger, but this was a Diplodocid, not Euhelopus- Taylor himself said a 50m, 17m neck is the most plausible for now, leading to a conservative weight of 100 tonnes, making this the winner for now. And it's still better evidence than for Plagne or Amphicoelias, plus it belongs in a pretty well known genus too.

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randomdinos In reply to ForbiddenParadise64 [2016-11-08 19:31:48 +0000 UTC]

Well, I'm not aware of anywhere Taylor said the C11 neck was implausible (I've read SV-POW's posts and comments on it, yes, and also the little PowerPoint presentation he did on the bones). Whether it's a mamenchisaur or diplodocid really has no affect on its plausibility, as Barosaurus's neck is already far longer than a Diplodocus or Apatosaurus of the same size (and has more vertebrae too), and since specimens of Barosaurus have to be pretty young if they are barely 50% the individual bone dimensions of adults, there is a lot of growth to be done. Considering that sauropod necks generally grow faster than the rest of their bodies across the whole group, it's isometric scaling that is the most questionable way, not allometry. The minimalism I acknowledge here was taking the C11-based 15m neck instead of the C9-based 17m neck, C9-based neck makes it around 70 tonnes which is comparable in size to giant titanosaurs.

Also, 38 tonnes? This one is 48

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ForbiddenParadise64 In reply to randomdinos [2016-11-08 23:16:52 +0000 UTC]

Well, it wasn't that C11 or C8 are implausible, just less likely than a C9 until they can get a better look at the original bones (which is currently proving difficult for them). Admittedly neck allometrically does through things out for Taylor's plain estimates that you've already seen, but it's still very doubtful that this animal, especially as a Diplodocid would be half neck, as among all other sauropods, only Erketu has such a feat, and that is a very different creature. And the last was misreading in my part. Oops. What do you think of some of the other giant candidates so far, if anything has changed?

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randomdinos In reply to ForbiddenParadise64 [2016-11-09 01:15:05 +0000 UTC]

Well, it isn't really half neck, half neck (since I used a 15m neck) would assume the whole thing is 30 meters long, when it's actually 40 in this reconstruction, an Erketu-like neck would be 20 meters.

As for the other candidates, well, I must note there are a bunch of brachiosaurs I hadn't considered before that enter pretty high in the ranking, like the Potter Creek Brachiosaurus, Fusuisaurus etc. which all appear to be rivaling the largest titanosaurs in length and even weight.

👍: 0 ⏩: 1

ForbiddenParadise64 In reply to randomdinos [2016-11-09 15:29:54 +0000 UTC]

Still nothing about Gara Samari tracks which is a shame. Apatosaurus must qualify too?

👍: 0 ⏩: 1

randomdinos In reply to ForbiddenParadise64 [2016-11-09 19:35:39 +0000 UTC]

Indeed, oddly enough Apatosaurus's place is really hard to decide.

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