If you have been paying attention to something other than the disastrous performance of the Broncos in the Super Bowl, you may have heard rumors of this creature. It is by far the most bizarre titanosaur to come out of China (yes even stranger than Ruyangosaurus, Baotianmansaurus, or Dongbeititan).
The paper is phenomenal, and the work of two good friends of mine, grad student Liguo Li and professor Peter Dodson from UPenn, as well as You Hailou, the reigning master of Chinese sauropod research.
Yongjinglong datangi is a mid-sized titanosaur from the Hekou group of early cretaceous Gansu province (home of both Huanghetitan and Daxiatitan), with some of the strangest proportions ever seen. The most obvious fact is that the shoulder blade is HUGE, but also rather slender at the back end, and the coracoid isn't all that big. The crazy-elongate proportions of the shoulder blade are rivaled by only one other sauropod within titanosauria, and barely one or two others outside it. Even compared to the ridiculously elongated (and similarly small-coracoided) "Ultrasauros" shoulder blade of Jim Jensen fame, this thing is extreme. This animal must have had one of the proportionally deepest rib cages on record, but a relatively narrow chest by comparison. And no, it's not closely related to either Huanghetitan or Euhelopus, although there may be common-niche convergences there. The second bizarre feature, the extremely robust and short lower arm with bulky end-processes, is a key feature of very advanced "lithostrotian" titanosaurs - as are the slender teeth found with the specimen. I won't ruin the excitement of its most likely (unpublished!) taxonomic affinities just yet, but suffice it to say, it's not from Opisthocoelicaudiinae, Saltasauridae, Euhelopodidae, Huanghetitanidae, or any of the other titanosauriform families previously known from China - in fact it appears to be most closely related to a group which until now was thought to have absolutely no presence there at all.
This dinosaur was about 60 ft. long (or more, the outline may be seriously underestimating the neck and tail for all we know). With those short legs and deep yet probably narrow belly, it really doesn't look much like anything seen before, alive or extinct. Think of a laterally compressed hippo perhaps... or stick a long neck and tail on an Embolotherium and you might get a similar result. I doubt this animal was in any way aquatic, but it's a safe guess that with that low of a belly clearance off the ground, these guys weren't stomping into steep highlands like Brachiosaurus.