Udeini is a tribe in the species-rich subfamily Spilomelinae in the pyraloid moth family Crambidae.

The tribe was erected by Richard Mally, James E. Hayden, Christoph Neinhuis, Bjarte H. Jordal and Matthias Nuss in 2019.

Furthermore, the corpus bursae usually bears an elongate rhombical, an ovate or an "ediacaroid" signum, named after the Ediacaran biota from the Neoproterozoic Era, which exhibit body shapes similar to the shape of the signum in Udeini.

[1] Udeini is one of the four so-called non-euspilomeline tribes, which share several plesiomorphic morphological characters with the sister group of Spilomelinae, the Pyraustinae.

The uncus shape in the male genitalia is very diverse, ranging from unicapitate in the Udea genus group (comprising Deana, Mnesictena, Tanaophysa, Udea and Udeoides) to conical in Conchylodes, reduced to a triangle in Sisyracera and Ercta, or even reduced to a slim transverse band over the tegumen in the monotypic genus Cheverella.