Dioxys moestus Costa, 1883 and Dioxys rotundatus Pérez, 1884

Notes. Based on a re-examination of publication dates, Wood (2025c: 289) returned Dioxys rotundatus (published February 1884) as the senior synonym of D. moestus Costa, 1884 (published April 1884). However, the work of Costa (1884) published in the Bullettino della Società Entomologica Italiana is in fact a reproduction and summary of his work Notizie ed Osservazioni sulla Geo-Fauna Sarda published in the Atti della Reale Accademia delle Scienze Fisiche e Matematiche di Napoli in June 1883 (Costa 1883) (M. Cornalba, pers. comm.). The first publication of the name D. moestus is therefore in 1883, pre-dating D. rotundatus . The change in priority recommended by Wood (2023) is therefore not followed, and the name D. moestus is retained for the European fauna, although the taxon concept employed by Wood (2025c) is retained.