Tianchisaurus
| Tianchisaurus Temporal range: Late Jurassic,
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| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Clade: | Dinosauria |
| Clade: | †Ornithischia |
| Clade: | †Thyreophora |
| Clade: | †Ankylosauria |
| Genus: | †Tianchisaurus Dong, 1993 |
| Type species | |
| †Tianchisaurus nedegoapeferima Dong, 1993
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| Synonyms | |
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Tianchisaurus (meaning "heavenly pool lizard"), also invalidly called Tianchiasaurus and "Jurassosaurus", is a genus of ankylosaurian dinosaur from the Late Jurassic (Oxfordian-Kimmeridgian) Toutunhe Formation of China. While many later-diverging ankylosaurids had bony clubs at the tips of their tails, Tianchisaurus likely lacked such a structure.