| Nanhsiungoolithus Temporal range: Late Cretaceous
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Egg fossil classification 
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| Basic shell type: | Ornithoid |
| Morphotype: | Ornithoid-ratite |
| Oofamily: | †Elongatoolithidae |
| Oogenus: | †Nanhsiungoolithus Zhao, 1975 |
| Oospecies | |
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Nanhsiungoolithus is an oogenus (fossil-egg genus) of dinosaur egg from the late Cretaceous of China. It belongs to the oofamily Elongatoolithidae, which means that it was probably laid by an oviraptorosaur, though so far no skeletal remains have been discovered in association with Nanhsiungoolithus. The oogenus contains only a single described oospecies, N. chuetienensis. It is fairly rare, only being know from two partially preserved nests and a few eggshell fragments.