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Spinosaurus

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Oxalaia have wake my interest for the spinosaur.
I working on a size chart.
Irritator would be the next.
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© 2011 - 2020 Hyrotrioskjan
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anonymous's avatar
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Wyatt-Andrews-Art's avatar
Wyatt-Andrews-ArtHobbyist General Artist
*2011 Speen intensifies*
Hyrotrioskjan's avatar
HyrotrioskjanProfessional General Artist
The cringe is real...
titanlizard's avatar
THE SPINOSAURUS'S BITE FORE WAS STRONGER THAN WE PERVIOUSLY THOUGHT!!!!!!
TheROC said this on carnivoraforum.com

"Dr. Manabu Sakamoto back on the dinobase forums around 2009, told me about some unpublished bite force estimates for Baryonyx, here. He said 3800 N (854.3 lbs of force). He said the skull he worked with was based on the Baryonyx specimen in the Natural History Museum (NHM) in London. Dr. Sakamoto agreed that it was probably 28 feet long. And from there I just scaled up to a possible 18 meter Baryonyx specimen, keeping in mind that muscular strength (jaw muscles are included in that of course) goes up as a square of the scaling factor, and came to the conclusion that a 18 meter baryonyx would have about a ~2 ton bite.

From there, just came a bit of guess work for an 18 meter spinosaurus, I reasoned that its mandible is significantly deeper than Baryonx's proportionately, that it might yield a bite force 50% greater than a baryonx skull of equal size. Which is where the ~3 ton bite force guess originally came from, as that's 50% greater than 2 tons. I feel a 50% stronger bite force at equal skull lengths is reasonable, considering the often great differences we see in different dog breed bite forces, even when skull length is comparable between breeds.

The whole thing is of course, assuming spinosaurus has a skull as proportionately long compared to its body size as baryonyx does, which I believe is fair; dal sasso and crew did estimate the spinosaurus maxilla they worked with in 2005 to be 17-18 meters using the smaller relatives like baryonx to scale from. And afterall, large theropods tend to have proportionately larger skulls than their smaller relatives as a rule, which means I could be underestimating the bite force in actuality.

The baryonyx bite force is unpublished officially, yes, but I spoke with Dr. Sakamoto again in 2010 via e-mail and asked him about the exact same baryonyx bite force figure and he said he is still preparing the theropod bite force estimates that the baryonyx figure comes from, for publication--but that he had other things that took priority at the moment. --So it seems to me that the bite force figure is still viable to discuss, at least within our circles(since we can't add it to wikipedia yet since its still unpublished).

Also, within that e-mail I discussed with him the study that you seem to be referencing in your opening, Grey. It is in fact Dr. Sakamoto's study as well, and that was initially the reason I e-mailed him to inquire further about the study, (while asking about the unpublished baronyx bite force figures as an aside). He was kind enough to actually give me the full pdf of it over e-mail. The study is not about bite forces directly, but rather mechanical advantages of skulls. It shows mechanical advantages for dozens of taxa across their whole tooth row. The mechanical advantage of course becomes lesser the further you move away from the 'inlever' (which are the jaw muscles in this case), so that means the closer you are to the jaw muscles, the greater the mechanical advantage (which is obvious to everyone here of course, the back is where you bite hardest). He actually revised the Spinosaurus mechanical advantage stats using a different skull reconstruction later, here here and got higher values. Anyway, if we compare the mechanical advantage of say T.Rex and Spinosaurus, in the back of their tooth row, closest to their jaw muscles, they are actually quite comparable. Spinosaurus mechanical advantage at the back teeth was just about 0.25, whereas T.Rex was at about 0.28. At the front of the skull though, there is a bigger difference. Spinosaurus' mechanical advantage at the front of the tooth row is a little over 0.11, whereas T.Rex's is about 0.16. There are plenty of theropods with greater mechanic advantage values at the back of the tooth row than T.Rex however, Carcharodontosaurus for one, if just looking at equal sized theropods, has a mechanical advantage value of about 0.37 at the back of the tooth row.


Anyway, I feel Spinosaurus had to have a pretty hefty bite in absolute terms.

[link]

See this Alligator Gar? Being chopped by an axe? Notice how difficult it is to do so, also notice how in one part of the video there are visible sparks made from the axe slashing along the scales? A lot of the types of fish Spinosaurus would have preyed on would have had the same kind of enamel hard ganoid scales, only they would have been even thicker ganoid scales since they belonged to bigger fish. Ganoid scales as you see, are quite hard, Native Americans even made arrow heads out of ganoid scales apparently.
Trendorman's avatar
TrendormanStudent Traditional Artist
Breaking news..Spinosaurs is a weiner dog....becuse of its legs :3
grisador's avatar
+Trendorman ; More Breaking News ! Thud Glad Icon 

Using other specimens legs on Other specimens Body Will result as an İnaccurate Chimera's !!   T-rex [lol] 


Same as The Deinocheirus case; few months ago thought to be Herbivore now it is known it is a Well OMNİVORE ! 
Trendorman's avatar
TrendormanStudent Traditional Artist
What now?
grisador's avatar
Well; I can only say 2015/14 is the Greatest failure Year of the Paleontology ! :O
Trendorman's avatar
TrendormanStudent Traditional Artist
Very. But a good year for The Fictional Dinosaur Godzilla!
grisador's avatar
After the Deinocheirus; I just want to '' Let it Go ! '' but I can't !  Rage 


İndeed; But not that Fictional; It lived... ONCE
Trendorman's avatar
TrendormanStudent Traditional Artist
Godzilla...Gojira..Not GojiraSaurus
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Hyrotrioskjan's avatar
HyrotrioskjanProfessional General Artist
Holy hell!!! Thanks for sharing this informations with me, that is very helpfull! =D
spinosaur67's avatar
spinosaur67Student Digital Artist
well spino is cool he is my favorite
Hyrotrioskjan's avatar
HyrotrioskjanProfessional General Artist
=)
spinosaur67's avatar
spinosaur67Student Digital Artist
what
Hyrotrioskjan's avatar
HyrotrioskjanProfessional General Artist
Nothing, just a emoticon.
spinosaur67's avatar
spinosaur67Student Digital Artist
ok
AmericanRaptor's avatar
AmericanRaptorHobbyist General Artist
Never did mind Spinosaurus, I mean, some animals have to earn their fame one way or another right?
Teratophoneus's avatar
die winzigen stacheln an schwanz und dem Hals lassen ihn wirklich realistisch aussehen, genauso wie es auch Todd Marshall macht, das ist richtig klasse!
Hyrotrioskjan's avatar
HyrotrioskjanProfessional General Artist
Ja der Todd hats drauf =D
Skull-Island-Master's avatar
cool der seht schön furchterregend aus
Hyrotrioskjan's avatar
HyrotrioskjanProfessional General Artist
Ja, Todd Marshall war Voebild =)
Skull-Island-Master's avatar
ich kanns kaum erwarten den irritator, suchomimus und den bahariasaurus sehen, lass dir aber ruhig Zeit bei ihm ich will dich nicht stressen.
Hyrotrioskjan's avatar
HyrotrioskjanProfessional General Artist
Ach was ich arbeite sowieso immer recht schnell.Die zeichnung ist schon fertig und soeben ist sie im Rechner verschwunden.
Wenn sich so was in die Länge zieht verliere ich leider oft die Motivation
Cephlaken's avatar
Spinosaurids are awesome dinosaurs. Crocodile-faced Mesozoic gargantuan herons with sails on thier backs....
anonymous's avatar
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