Type(s) [AUSTRIA]: Vienna district, (? Depository).. (Collection destroyed, Horn & Kahle, 1936, Ent. Beih. Berl.-Dahlem 3: 243)
Nye (1975) stated:-
N. decora has been cited by some authors as Euxoa nivens Hübner,  1816, ibidem: 209, proposed, unnecessari]y, as an objective replacement name for Noctua decova which Hübner considered to be a junior homonym of Phalaena (Noctua) decora Linnaeus, 1764, Mus. Lud. Ulr.: 382, -Lepid., Agaristidae.
Poole (1989) included METAXYJA Hübner, 1821; EXARNIS Hübner, 1821; BROTIS Hübner, 1821; TELMIA Hübner, 1821; MIMETES Hübner, 1821; PLEONECTOPODA Grote, 1873; CARNEADES Grote, 1883; CHORIZAGROTIS Smith, 1890; PARAGROTIS Dyar, 1903; OROSAGROTIS Hampson, 1903; MESOEUXOA Corti, 1932; MENADA Kozhantschikov, 1937; and LONGIVESICA Hardwick, 1970 as junior synonyms of EUXOA Hübner, 1821.
Poole (1989) included 311 species in the genus EUXOA.
Learn more about Noctuidae in Wikipedia
Search the Biodiversity Heritage Library (BHL) for references to EUXOA and included species.