C. nigrescens may refer to: Calliophis nigrescens, the black coral snake, a venomous snake species found in the Western Ghats of India Crassispira nigrescens, a sea snail species Cryptotis nigrescens, the blackish small-eared shrew, a mammal species found in parts of Costa Rica, El Salvador, Guatemala, Honduras, Mexico and Panama
Synonyms Commiphora nigrescens, a synonym for Commiphora angolensis, a shrub species found in Angola
See also