Deleted
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Post by Deleted on Sept 16, 2014 6:07:56 GMT 5
I got the paper that describes Parabrontopodus distercii, there is a print 165cm long but is part of a single trackway, the rest of the pes prints are 135-162cm long for an average of 148.5cm long, pretty big right? well no, their average width is 72.7cm, they are clearly the prints of an animal whose feet are sliding in the mud, Parabrontopodus distercii was not a super giant, it was roughly the size of Diplodous CM84, maybe a little bigger, still, we are dealing with a sauropod that probably didn't surpass 20 tonnes. Wait what? At least we've still got the Plagne Diplodocoid. Btw, regarding Dreadnoughtus, has anyone compared the proportions of the 3d model skeleton to the 2d skeletal reconstruction? |
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Fragillimus335
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Sauropod fanatic, and dinosaur specialist
Posts: 573
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Post by Fragillimus335 on Sept 16, 2014 8:00:56 GMT 5
Early published sizes of Tyrannosaurus were not exaggerated, apart from excessively long tail but we are talking about 25% longer at most, Andesaurus yes it's true that Dixon had that ridiculous estimate in his book but apart from Sassani (just for a while) I don't remember anyone else taking it seriously. But I guess you have point. EDIT: I'll put this here to avoid double post. I got the paper that describes Parabrontopodus distercii, there is a print 165cm long but is part of a single trackway, the rest of the pes prints are 135-162cm long for an average of 148.5cm long, pretty big right? well no, their average width is 72.7cm, they are clearly the prints of an animal whose feet are sliding in the mud, Parabrontopodus distercii was not a super giant, it was roughly the size of Diplodous CM84, maybe a little bigger, still, we are dealing with a sauropod that probably didn't surpass 20 tonnes. Yeah, Parabrontopodus was not that large at all. But I really want some australian paleontologists to get searching for the Broome titanosaur. |
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blaze
Paleo-artist 
Posts: 766
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Post by blaze on Sept 16, 2014 10:32:59 GMT 5
@brolyeuphyfusion The svpow guys did, look at their most recent blogpost. Fragillimus335As in the bones of the animal? I think beter photos and drawings of all the known prints should come first. |
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Deleted
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Post by Deleted on Sept 16, 2014 13:52:49 GMT 5
@brolyeuphyfusion The svpow guys did, look at their most recent blogpost. They actually didn't, but I did. I used shoulder-hip length as the torso length instead though. The 3D model lies between the unmodified skeletal and the SVPOW shortened version, closer to the latter than the former.  Btw I think Dreadnoughtus most likely had a high-rise neck rather than the horizontal neck in the skeletal, the 3D model shows that it has shoulders higher than it's hips, giving it a brachiosaur-like back slope. Even if the cervicals were forced perfectly straight, the neck would still rise upward at an angle. |
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Post by theropod on Sept 16, 2014 14:58:22 GMT 5
blaze: What's the title of that paper? I searched for wherever it was described previously but didn't find anything. 73cm wide prints are bigger than dippy, albeit not necesasarily by much. But I wouldn't take the width measurement as very reliable either if the tracks show signs of such extreme slippage.
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Post by creature386 on Sept 16, 2014 17:57:09 GMT 5
One thing that made me curious is when he said that large titanosaurids were more like brachiosaurids in neck posture. Is there information on this? According to The Dinosauria, a horizontal neck posture was the more common one in sauropods and that Brachiosaurus&relatives were the exception. I now checked their arguments: -Most sauropods had taller hips than shoulders (not the case in Dreadnoughtus). -Most sauropods lacked tall neural spines near the neck base (also not the case in Dreadnoughtus). Therefore, I believe the neck was probably pretty erect, but not as vertical as in Brachiosaurus, since the difference between shoulder and hip height is not that extreme. |
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blaze
Paleo-artist
Posts: 766
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Post by blaze on Sept 16, 2014 22:32:36 GMT 5
@brolyeuphyfusion They estimated the length of the torso based on the measurements because the 3d skeleton is not properly articulated (the vertebrae are too far apart), it seems I didn't understood your question. theropodMeijide-Fuentes, Fuentes-Vidarte and Meijide-Calvo (1999) "Primeras huellas de sauropodo en el Weald de Soria (España), Parabrontopodus distercii, nov. ichnoesp." Here's figure 1 of the paper:  And a link to the paper: link |
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Post by theropod on Sept 16, 2014 23:39:47 GMT 5
Thanks!
That those are slip marks is blatantly obvious, no animal has a footprint anything like that unless it”s deformed. I think fragillimus actually linked me a picture showing something similar once.
I really have to learn Spanish. First thing I’ll do when I’ve finished school (I hope…).
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blaze
Paleo-artist
Posts: 766
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Post by blaze on Sept 18, 2014 7:07:44 GMT 5
Has my image disappeared or is it just me?
Anyway I've performed a complete GDI of Sassani's Futalongkosaurus skeletal, total volume is 56.8m^3 which means a mass of ~40 tonnes assuming a density of 0.7kg/m^3. Now, I think that his skeletal is 10% too big in linear dimensions, taking this into account the weight goes down to ~30 tonnes, comparable to Wedel's GDI of the similarly sized Dreadnoughtus and Armstrongs's GDI of his own Futalongkosaurus skeletal (25 tonnes IIRC), of note is that Sassani's skeletal at "normal" scale has a ribcage 4.1m across at its widest point.
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Deleted
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Post by Deleted on Sept 18, 2014 10:16:44 GMT 5
Has my image disappeared or is it just me? Anyway I've performed a complete GDI of Sassani's Futalongkosaurus skeletal, total volume is 56.8m^3 which means a mass of ~40 tonnes assuming a density of 0.7kg/m^3. Now, I think that his skeletal is 10% too big in linear dimensions, taking this into account the weight goes down to ~30 tonnes, comparable to Wedel's GDI of the similarly sized Dreadnoughtus and Armstrongs's GDI of his own Futalongkosaurus skeletal (25 tonnes IIRC), of note is that Sassani's skeletal at "normal" scale has a ribcage 4.1m across at its widest point. Well, I think an SG of ~0.8 is more likely, which means that the figures would be ~45.04 tonnes and ~32.83 tonnes respectively. How about a GDI of shartman's Futalognkosaurus? You can use Nima's as reference for the top/front view. |
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blaze
Paleo-artist
Posts: 766
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Post by blaze on Sept 18, 2014 10:38:41 GMT 5
I personally think Sassani's ribcage is too wide but I could try, though I wouldn't do it soon, midterms are about to start, this one I did because I really wanted to confirm if his own skeletals supported his mass estimates, it seems like they don't which makes me think he just eyeballs them.
He already responded, he is in disbelief and I'm not quite sure he understands how GDI works, reads as if he thinks is some type of allometric equation but I'm not sure.
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Deleted
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Post by Deleted on Sept 18, 2014 10:55:10 GMT 5
I personally think Sassani's ribcage is too wide but I could try, though I wouldn't do it soon, midterms are about to start, this one I did because I really wanted to confirm if his own skeletals supported his mass estimates, it seems like they don't which makes me think he just eyeballs them. He already responded, he is in disbelief and I'm not quite sure he understands how GDI works, reads as if he thinks is some type of allometric equation but I'm not sure. He likely does eyeball them. He's not really much of a "math person", he says it himself. comments.deviantart.com/1/339561616/3597641717 |
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Post by malikc6 on Sept 18, 2014 13:13:40 GMT 5
I personally think Sassani's ribcage is too wide but I could try, though I wouldn't do it soon, midterms are about to start, this one I did because I really wanted to confirm if his own skeletals supported his mass estimates, it seems like they don't which makes me think he just eyeballs them. He already responded, he is in disbelief and I'm not quite sure he understands how GDI works, reads as if he thinks is some type of allometric equation but I'm not sure. He likely does eyeball them. He's not really much of a "math person", he says it himself. comments.deviantart.com/1/339561616/3597641717I hate math to. |
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blaze
Paleo-artist
Posts: 766
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Post by blaze on Sept 24, 2014 10:15:43 GMT 5
 Have you seen this? I had not realized how awful that reconstruction is. |
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stomatopod
Junior Member
Gluttonous Auchenipterid
Posts: 182
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Post by stomatopod on Sept 24, 2014 13:07:22 GMT 5
Hahaha this mount again.
A pure imagination made out of Pilaster.
We Bad this thing around here in an exhibition together with lots of other dinosaurs from Argentina. The other stuff was pretty cool but this thing is just funny.
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