A. nigricans may refer to:

• Acacia nigricans, a wattle species endemic to an area on the south coast of Western Australia
• Acanthurus nigricans, a tang fish species from the Eastern Indian Ocean
• Acronicta nigricans, a moth species found in western China
• Aspideretes nigricans, the black soft-shelled turtle or Bostami turtle, a freshwater turtle species found in India and Bangladesh
• Avrainvillea nigricans, an algae species in the genus Avrainvillea

Synonyms

• Australorbis nigricans, a synonym for Biomphalaria tenagophila, an air-breathing freshwater snail species

See also

• Nigricans (disambiguation)