On the permanent invalidity of certain eucerine bee names (Hymenoptera: Apidae: Eucerini)

The new updated checklist of the bees of Morocco (Sentil et al. 2025) uses two names for bees in the tribe Eucerini Latreille, 1802 which have a complicated nomenclatural history.Specifically, these are Eucera nigra Lepeletier, 1841 and Tetralonia nigrifacies Dours, 1873.These two names are permanently invalid, as detailed below, and cannot be used under the provisions of the ICZN (1999) Code, Article 59.3, which states: "A junior secondary homonym replaced before 1961 is permanently invalid unless the substitute name is not in use and the relevant taxa are no longer considered congeneric, in which case the junior homonym is not to be rejected on grounds of that replacement".Both criteria must be met in order for a replaced name to become valid again, and the former criterion is not met for either name.