E. nigricans may refer to: Enchelycore nigricans, the mottled conger moray or mulatto conger, a moray eel species found in the Atlantic and Pacific Oceans Endochironomus nigricans, a non-biting midge species in the genus Endochironomus found in Europe Enneapogon nigricans Epidendrum nigricans, Schltr., 1913, an orchid species in the genus Epidendrum Euxesta nigricans, a picture-winged fly species Euxoa nigricans, the garden dart, a moth species found throughout Europe Evarcha nigricans, Dalmas, 1920, a jumping spider species in the genus Evarcha found in Tunisia
See also Nigricans (disambiguation)