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December 27, 2013
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Fusuisaurus zhaoi skeletal by Paleo-King Fusuisaurus zhaoi skeletal by Paleo-King
Fusuisaurus zhaoi

Etymology: "Zhao Xijin's Fusui County lizard"

Time horizon: Early Cretaceous, Aptian epoch? (~120 mya)

Length: ~30m (~100 ft.)

Probable mass: 70 tons

*Now re-scaled - this animal is a bit smaller than previously predicted* Missing portions of described bones are shaded in light gray.

The mysterious, never-before-restored, and downright colossal Fusuisaurus. The first and only true brachiosaur discovery known from China (no, Qiaowanlong and Zigongosaurus are NOT brachiosaurs), this giant is unique in two critical ways: it is unusual in being so basal so late; and it is apparently more closely related to Brachiosaurus altithorax than any other species of brachiosaur. The ilium is extremely similar to Brachiosaurus, and the tail vertebrae follow a similar pattern. This species punches a hole in the notion that basal members of a clade can't grow to gigantic sizes - sometimes they can even exceed the sizes of many derived members. The charcters of all recovered elements correspond well to a late survivor of a basal progenitor lineage for Brachiosaurus. It is evidently not, as has sometimes been claimed, a basal titanosaur or a somphospondylian.

Often labeled in the Chinese press as the most basal titanosauriform known, the reputation is a bit premature. Evidently its distinctively brachiosaur features show that Fusuisaurus was considerably more advanced than the most basal titanosauriforms (Volkheimeria, "Lavocatitan" and the klamelisaurids). Pneumaticity is not very developed in the ribs, so this animal is likely more primitive than Brachiosaurus itself, despite being a far more recent species. It appears to be a living fossil that survived from the mid-Jurassic days of Brachiosaurus' direct ancestors, survivors of which seem to have long outlasted Brachiosaurus itself. How such instances of extremely long survival for such "holdover taxa" and basal bloodlines take place, particularly in a fast-evolving (and fast-turnover) warm-blooded class like Dinosauria, is still not properly understood.


References:

Mo, J., Wang W.,Huang Z., Huang X., Xu X., 2006, "A Basal Titanosauriform from the Early Cretaceous of Guangxi, China", Acta Geologica Sinica, Vol.80 No.4 P.486-489
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:iconkazuma27:
Kazuma27 Featured By Owner Jul 13, 2014  Hobbyist General Artist
Giant sauropods, giant sauropods everywehere!
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:iconsameerprehistorica:
SameerPrehistorica Featured By Owner Jun 21, 2014  Hobbyist
Happy to see that at least some brachiosaur is in the range of 70 tonnes.Well,i always believed there could be few of them or at least one of their species could weigh 70 or 75 tonnes.Also i believe that some Titanosaur is going to hit solid 120 tonnes plus.
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:iconpaleo-king:
Paleo-King Featured By Owner Jun 22, 2014  Professional Traditional Artist
Maybe one of the new beasts from Chubut, Argentina? Or perhaps whatever made the Plagne tracks in France. Those are definitely big enough.
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:iconsameerprehistorica:
SameerPrehistorica Featured By Owner Jun 22, 2014  Hobbyist
The estimated weight of that one is similar to Argentinosaurus and yet they said it is larger than Argentinosaurus.Anyway,but someday a 100 tonne plus Titanosaur is going to show up and then i wonder where those people will keep their face who said that 100 tonnes is the maximum weight for a land animal.A land animal weigh in excess of 100 tonnes will crush itself.             
           We can see about that.
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:iconpaleo-king:
Paleo-King Featured By Owner Jun 22, 2014  Professional Traditional Artist
Actually I heard the maximum limit was closer to 150 tons. At 160 tons, some theoretical models (like McNeill Alexander's) guess that the legs would need to be so thick as to almost touch each other. I highly doubt this, but then again we've never seen a dinosaur that big so jury's out for now. A number of tests on different materials in a Discovery channel program showed that the bones of Argentinosaurus could in theory support around 90-95 tons before buckling.
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:iconsameerprehistorica:
SameerPrehistorica Featured By Owner Jun 22, 2014  Hobbyist
I just searched if anyone said a max limit was 150 tonnes.I can't able to find it.I read some info from McNeill Alexander about dinosaur weight problems.Then i read this sentence for Bruhathkayosaurus from this site and it made me laugh.----------( Not all palaeontologists are even convinced that it was a bone at all, rather than a fossilised tree-trunk.)

www.walkingwithdinosaurs.com/n…
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:iconfragillimus335:
Fragillimus335 Featured By Owner Mar 31, 2014  Hobbyist General Artist
I think this is my favorite of your skeletals.  It has wonderful, and well-balanced proportions.
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:icondarklord86:
darklord86 Featured By Owner Mar 2, 2014
Very impressive!
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:iconelsqiubbonator:
ElSqiubbonator Featured By Owner Feb 15, 2014
Wasn't there another Sauroposeidon-sized Chinese brachiosaur that you mentioned earlier? 
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:iconpaleo-king:
Paleo-King Featured By Owner Feb 15, 2014  Professional Traditional Artist
Don't think so... a Chinese brachiosaur? Fusuisaurus is the only legit one as far as I know. China has some huge sauropods but most are either titanosaurs (like Ruyangosaurus) or basal somphospondyli (like Daxiatitan and Huanghetitan). Maybe you can find where I apparently said that?
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