A. nigra may refer to:
- Actia nigra, a tachinid fly species
- Aculeola nigra, the hooktooth dogfish, a small, little known dogfish, the only member of the genus Aculeola
- Alpinia nigra, an herb in the ginger family
- Arkoola nigra, a fungus plant pathogen species
- Astrapia nigra, the Arfak Astrapia, a large black bird of paradise species
See also edit
This disambiguation page lists articles associated with the same abbreviated species scientific name.
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