Neptunia

The genus name Neptunia may refer to:

Animalia:
- Neptunia Renier, 1847 (Cnidaria), uncertain
- Neptunia Locard, 1886 (Gastropoda, Buccinidae) = synonym of Neptunea Röding, 1798
- Neptunia Barnes & McDunnough, 1911, junior homonym = synonym of Emmelia Hübner, [1821] 1816 (Lepidoptera, Noctuidae)

Plantae:
- Neptunia Lour. (1790) (Fabales, Fabaceae)

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