Corimbatichnus fernandezi n.igen, n. isp.is a cluster of fossil bee cells from the Uruguayan Late Cretaceous‐early Tertiary Asencio Formation. It is composed of rows of small excavated cells contained in paleosol peds. Cells have inner surfaces somewhat rough and are closed with loose material. Separation among cells is very thin, and the cells are orientated uniformly, showing a great economy of space as in some halictine constructions.Corimbatichnuscan be distinguished fromRosellichnusandUruguayby its convex face, excavated cells and the spatial arrangement of them.