C. nitidus

C. nitidus may refer to:
 * Calymmaderus nitidus, a beetle species
 * Carpodectes nitidus, the snowy cotinga, a bird species found in Costa Rica, Honduras, Nicaragua and Panama
 * Cimolodon nitidus, a mammal species from the Upper Cretaceous of North America
 * Copelatus nitidus, a diving beetle species
 * Ctenopharynx nitidus, a fish species found in Malawi, Mozambique and Tanzania