Middle Jurassic

China

 

The best Middle Jurassic known dinosaurs are mostly known from China.  China has produced two of the most diverse Middle Jurassic faunas in the world.  The Jurassic China seems to have been isolated from the faunas of Africa and North American. The earliest stegosaurs are from Asia they tend to be smaller than the classic American Stegosaurus.  The plates are smaller, shoulder spikes are common like the African stegosaur Kentrosaurus.  The theropods generally resemble Allosaurus or Megalosaurus.  The large sauropods don't seem to be closely related to the sauropods found elsewhere.   

Updated 110312

From the first part of the Middle Jurassic Chuanjiesaurus anaensis ( alternately Chuanjesaurus ) found in 1995 is the largest sauropod dinosaur that ever lived in Asia. The bones of the animal were uncovered in 2001. The dinosaur is 27 meters long from head to tail and is placed in the same family as the later Mamenchisaurus.

Kaiyodo Chuanjiesaurus Wonderus World of Dinosaurs 2004 special

Chungkingosaurus had shoulder spikes and narrow plates or spikes along the back with large thick spine-like bony plates (intermediate between spines and plates) and apparently four or five pairs of tail spines. May be transitional between the African Kentrosaurus and the North American Stegosaurus.  Asian stegosaurs are often reconstructed with shoulder spikes like Kentrosaurus or in older publications with a hip spike. Yangchuanosaurus was a carnosaur with a flexible neck and stiff tail. It was very similar to Allosaurus, with more teeth and a ridge along its nose. It may also have had a small crest and a low fin along its back.

The Safari Dinosaur of China Yangchuanosaurus.