Name: Wannanosaurus‭ (‬Lizard from Wannan‭)‬.
Phonetic: Wan-nan-oh-sore-us.
Named By: Hou‭ ‬– 1977.
Classification: Chordata,‭ ‬Reptilia,‭ ‬Dinosauria,‭ ‬Ornithischia,‭ ‬Cerapoda,‭ ‬Pachycephalosauria.
Species: W.‭ ‬yansiensis (type).
Type: Herbivore.
Size: Estimated‭ ‬60cm long.
Known locations: China -‭ ‬Xiaoyan Formation.
Time period: Campanian of the Cretaceous.
Fossil representation: Skull fragment,‭ ‬part of left mandible,‭ ‬six vertebrae,‭ ‬part of ilium,femora,‭ ‬left and right tibia,‭ ‬left fibula,‭ ‬humerus.

       Little is known about Wannanosaurus,‭ ‬but the skull specimen found appears to have been from a fully grown adult as the bones that make up the skull show signs of being fused together.‭ ‬Wannanosaurus is considered a primitive member of the pachycephalosaurs because it has a flat skull roof and enlarged openings when compared to other later pachycephalosaurs.

Further reading
- A new primitive Pachycephalosauria from Anhui, China.It is the second smallest dinosaur in world after Microceratops. - Vertebrata PalAsiatica. 15 (3): 198–202. - Hou Lian-Hai - 1977.


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