Nipponopterus
| Nipponopterus Temporal range: Late Cretaceous,
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| Skeletal reconstruction indicating the placement of the holotype (white) | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Reptilia |
| Order: | †Pterosauria |
| Suborder: | †Pterodactyloidea |
| Clade: | †Azhdarchoidea |
| Family: | †Azhdarchidae |
| Clade: | †Quetzalcoatlini |
| Genus: | †Nipponopterus Zhou et al., 2025 |
| Species: | †N. mifunensis
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| Binomial name | |
| †Nipponopterus mifunensis Zhou et al., 2025
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Nipponopterus (meaning "Nippon wing") is an extinct genus of azhdarchid pterosaur that lived during the Late Cretaceous (Turonian to Coniacian ages) in what is now Japan. It is known from a partial cervical (neck) vertebra found in the 'Upper Formation' of the Mifune Group, located in the Kumamoto Prefecture in Kyūshū. The genus contains a single species, Nipponopterus mifunensis, named and described in 2025. It is the first pterosaur to be named from Japan.
Morphologically, Nipponopterus is similar to the Mongolian genus Gobiazhdarcho. Both are estimated to have had a wingspan measuring around 3 to 3.5 m (9 ft 10 in to 11 ft 6 in) when fully grown. Nipponopterus is a member of the clade Quetzalcoatlinae within the family Azhdarchidae.