Udea is a genus of snout moths in the subfamily Spilomelinae of the family Crambidae. The genus was erected by Achille Guenée in 1845. The currently known 215 species are present on all continents except Antarctica. About 41 species are native to Hawaii. Systematics The genus is placed in the tribe Udeini, where it is closest related to the genera Mnesictena, Deana and Udeoides. In the past, Mnesictena was included in Udea, but it is currently considered a separate genus comprising seven species. The North American, European and African Udea species have been treated in several studies, and a number of species groups has been proposed (see below). Species Udea ferrugalis species group: Udea accolalis (Zeller, 1867) Udea azorensis Meyer, Nuss & Speidel, 1997 Udea delineatalis (Walker in Melliss, 1875) Udea exigualis (Wileman, 1911) Udea ferrugalis (Hübner, 1796) Udea heterodoxa (Meyrick, 1899) Udea kirinyaga Mally in Mally et al., 2022 Udea liopis (Meyrick, 1899) Udea lugubralis (Leech, 1889) Udea maderensis (Bethune-Baker, 1894) Udea meruensis Mally in Mally et al., 2022 Udea momella Mally in Mally et al., 2022 Udea montensis Mutuura, 1954 Udea namaquana Karisch & Mally in Mally et al., 2022 Udea nicholsae Mally in Mally et al., 2022 Udea nordmani (Rebel, 1935) Udea profundalis (Packard, 1873) Udea pyranthes (Meyrick, 1899) Udea rubigalis (Guenée, 1854) Udea rusticalis (Barnes & McDunnough, 1914) Udea stationalis Yamanaka, 1988 Udea swezeyi (Zimmerman, 1951) Udea itysalis species group: Udea abstrusa Munroe, 1966 Udea beringialis Munroe, 1966 Udea brevipalpis Munroe, 1966 Udea cacuminicola Munroe, 1966) Udea costalis (Eversmann, 1852) Udea derasa Munroe, 1966 Udea itysalis (Walker, 1859) Udea livida Munroe, 1966 Udea radiosalis (Möschler, 1883) Udea tachdirtalis (Zerny, 1935) Udea turmalis (Grote, 1881) Udea numeralis species group: Udea ardekanalis Amsel, 1961 Udea bipunctalis (Herrich-Schäffer, 1848) Udea confinalis (Lederer, 1858) Udea cyanalis (La Harpe, 1855) Udea exalbalis (Caradja, 1916) Udea fimbriatralis (Duponchel, 1833) Udea fulvalis (Hübner, 1809) Udea hageni Viette, 1952 Udea institalis (Hübner, 1819) Udea languidalis (Eversmann, 1842) Udea lutealis (Hübner, 1809) Udea numeralis (Hübner, 1796) Udea olivalis (Denis & Schiffermüller, 1775) Udea praepetalis (Lederer, 1869) Udea ruckdescheli Mally, Segerer & Nuss, 2016 Udea tritalis (Christoph, 1881) Udea zernyi (Klima in Zerny, 1940) Udea alpinalis species group: Udea alpinalis (Denis & Schiffermüller, 1775) Udea altaica (Zerny, 1914) Udea austriacalis (Herrich-Schäffer, 1851) Udea bourgognealis Leraut, 1996 Udea carniolica Huemer & Tarmann, 1989 Udea cretacea (Filipjev, 1925) Udea donzelalis (Guenée, 1854) Udea juldusalis (Zerny, 1914) Udea murinalis