KEY TO GENERA OF † OTHNIODELLITHIDAE 1. Flagellum with 20 flagellomeres; hind wing with three hamuli................................................... Xenodellitha Flagellum with> 20 flagellomeres; hind wing with five or more hamuli ...................................................... 2 2. Flagellum with 21 flagellomeres; cephalic horn with apical teeth; fore wing with M+Cu not aligned with 1Cu, 2m-cu absent, 1M and 1cu-a not aligned, 2cu-a absent, 2A absent ............ Othniodellitha Engel & Wang, 2016 Flagellum with 22 flagellomeres; cephalic horn without apical teeth; fore wing with M+Cu aligned with 1Cu, 2m-cu present, 1M and 1cu-a aligned, 2cu-a present, 2A present ................................. Keratodellitha

Published as part of Jouault, Corentin, Maréchal, Arthur, Condamine, Fabien L., Wang, Bo, Nel, André, Legendre, Frédéric & Perrichot, Vincent, 2022, Including fossils in phylogeny: a glimpse into the evolution of the superfamily Evanioidea (Hymenoptera: Apocrita) under tip-dating and the fossilized birth-death process, pp. 1396-1423 in Zoological Journal of the Linnean Society 194 on page 1412, DOI: 10.1093/zoolinnean/zlab034, http://zenodo.org/record/6458537