Name: Tianchisaurus ‭(‬Heavenly pool lizard‭)‬.
Phonetic: ‭ ‬Ti-an-che-sor-us.
Named By: Z.‭ ‬Dong‭ ‬-‭ ‬1993.
Synonyms: Sanghongesaurus
Classification: Chordata,‭ ‬Reptilia,‭ ‬Dinosauria,‭ ‬Ornithischia,‭ ‬Thyreophora,‭ ‬Ankylosauria.
Species: T.‭ ‬nedegoapeferima‭ (‬type‭)‬.
Diet: Herbivore.
Size: Unavailable.
Known locations: China,‭ ‬Xinjiang‭ ‬-‭ ‬Toutunhe Formation.
Time period: Mid Jurassic.
Fossil representation: Skull and partial post cranial skeleton.

       Tianchisaurus was originally dubbed‭ (‬but never officially named‭) ‬Jurassosaurus because in the same year that it was named,‭ ‬the very first Jurassic park film was released.‭ ‬Incidentally,‭ ‬the name Jurassosaurus was suggested by Steven Spielberg who produced and directed the film.‭ ‬Dong rejected the name Jurassosaurus in favour of Tianchisaurus,‭ ‬but kept the species name‭ ‘‬nedegoapeferima‭’ ‬as this was created from the surnames of the main actors of the film.
       Tianchisaurus was a primitive ankylosaur,‭ ‬but one which has an uncertain placement.‭ ‬To start the tail club seems to have been severely underdeveloped,‭ ‬perhaps even absent and the jaws are also quite narrow.‭ ‬These two features‭ (‬or in the case of the club,‭ ‬lack of‭) ‬themselves are most commonly associated with nodosaurid dinosaurs,‭ ‬close cousins of the ankylosaurid dinosaurs.‭ ‬For this reason most palaeontologists prefer to list Tianchisaurus within the Ankylosauria which features both nodosaurid and ankylosaurid dinosaurs,‭ ‬but also hold back upon a specific placement in either group until new specimens and/or research can prove one over the other.

Further reading
-‭ ‬An ankylosaur‭ (‬ornithischian dinosaur‭) ‬from the Middle Jurassic of the Junggar Basin,‭ ‬China.‭ ‬-‭ ‬Vertebrata PalAsiatica‭ ‬31‭(‬4‭)‬:257-266.‭ ‬-‭ ‬Z.‭ ‬Dong‭ ‬-‭ ‬1993.


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