A kind little 1.7m SH rhino provides scale...
Note: Huaxiaosaurus is a real dinosaur, but it remains to be seen if it is a new species, or just a specimen of Shantungosaurus.
The ´Huaxiaosaurus´ specimen has a 1.72 m femur, while the largest known Shantungosaurus femur measures 1.805 m, resulting a weight of up to 22 tonnes.
That´s really a very nice drawing!
And possibly/probably quite realistic in size too, incredible as it may seem. What makes it even more amazing is the fact that the large specimen on which the species description was based (the one you mention, 18.7 m long) may not even have been full-grown, because its sacral vertebrae are not yet fused.
Did you know that huge tracks of giant duckbills have been found in coalmines in Utah and Colorado? Look for 'Dinosauropodes', especially the ichnospecies D. magrawii. You could call that one the duckbill equivalent of Ceratopsipes
The longest distinct tracks are 1.36 m long (4.5 feet), with indistinct hints of some even bigger ones. Since the absolute minimum ratio of hip height to hind foot (pes) length is 4 and the average about 5.5 (the maximum about 6), this would indicate a hip height of at least 5.5 m (18 ft), more likely around 6.8 – 7.5 m (roughly 22 - 25 ft), possibly more. And that is height at the hips! That’s even pretty impressive for a sauropod!
I have been wondering whether maybe such giant duckbills arose in the absence of sauropods, filling that niche. In Late Cretaceous North America there was an (approx.) 30 million year absence known as the 'sauropod gap', until the latest Cretaceous (Maastrichtian, about last 5 million years), when there was Alamosaurus, possibly an invader from South America. Notable that the giant Sout American sauropod Puertasaurus is very Late Cretaceous, Maastrichtian. I am not sure, but there may have been a similar sauropod absence in Late Cretaceous (East) Asia. During this stage, there were giant duckbills in North America and East Asia, in the eastern US there was Hypsibema, in the west Lambeosaurus (Magnapaulia) laticaudus, possibly also very large Edmontosaurus. And of course the intriguing tracks. In East Asia there is Shantungosaurus (plus the two related mentioned species, possibly synonyms), possibly also Saurolophus and others.BTW, according to latest insights Huaxiaosaurus is indeed probably Shantungosaurus, and Zhuchengosaurus as well.
Finally, that looks like a white or square-lipped rhino, the largest rhino species. I have seen them up close (even touched one), I thought they were big.
Nice paleo-art, keep up the good work! When are you going to do Alamosaurus (I mean the really big ones, according to the latest discoveries), and B. nougaredi?
How large is the holotype of B altithorax? I think it was subadult too, From what I've heard there is no Brachiosaur known that has a fused scapulocoracoid. I also heard of a bigger specimen (~15% bigger I think) somewhere but I don't remember where and what it was.
This Hadrosaur is just enourmous. How long is its skull? It seems like it could be one of the largest among terrestrial animal.
I think the specimen you might be thinking of is HM XV2, a likely adult that is ~13% larger than the holotype. It is represented by a fibula.
The skull was probably ~2.1+ meters long, the scale bars in the paper are atrocious, but because it was likely just a big Shantungosaurus, scaling it up should give a pretty decent estimate.
I tought there was some larger specimen of B. althithorax out there somewhere. It's kinda sad B. Althithorax is not so well documented.
But I think it was really HM XV2 that I used back then, I remember it gave me a 28m animal. I think I read that on the Wikipedia-page before it was removed because it actually referred to a specimen of G. brancai. I must have assumed the holotype of B. althithorax was ~25m.
But I think it would really be somewhat longer than G. brancai (which is 22m), due to the longer torso and supposed longer tail, wouldn't it?
So the largest specimens we have of both were ~25m.
B. nougaredi seems gigantic tough, if it is really 60% bigger like Nima states, it could easily rival giant titanosaurs like Argentinosaurus.
B. nougaredi was indeed huge. With a sacrum ~162cm long, that's a whopping 65% larger than the 23m Giraffititan holotype. If it had a long neck like Sauroposeidon, it was a good bit over 40m long, and weighed ~110t.
That's a damn huge skull, not as large as the largest ceratopsian skulls but it comes close.