| Ninjemys Temporal range:
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|---|---|
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| Reconstructed fossil skull | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Clade: | Pantestudines |
| Clade: | Testudinata |
| Family: | †Meiolaniidae |
| Genus: | †Ninjemys Gaffney, 1992 |
| Species: | †N. oweni
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| Binomial name | |
| †Ninjemys oweni (Woodward, 1888)
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| Synonyms | |
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Ninjemys oweni is an extinct large meiolaniid stem-turtle from Pleistocene Queensland and possibly New South Wales (Australia). It overall resembled its relative, Meiolania, save that the largest pair of horns on its head stuck out to the sides, rather than point backwards, the larger scales at the back of its skull and the tail club which is made up of only two tail rings rather than four. With a shell length of approximately 1 m (3 ft 3 in) it is a large turtle and among the largest meiolaniids. Ninjemys is primarily known from a well preserved skull and associated tail armor, which were initially thought to have belonged to the giant monitor lizard Megalania (Varanus priscus).