ABSTRACT: Urnummulites schaubi n. gen. n. sp., is a rotaliid foraminifera. It is found for the first time in the Late Paleocene toe of slope sediments of a carbonate platform Stratigraphic section D6, Bir Dakhl, Southern Galala, Eastern Desert, Egypt. The form is believed to be the ancestor of Nummulites. It is distinguished from Kathina by having asymmetrical polar pustules on both sides. The pustule is onlywell pronounced ventrally,where it possesses perforations (punctuation) and is lacking theumbilical pillar found inKathina. In the involute ventral side the test possesses “alar†prolongations. s. str., while these prolongations are lacking dorsally. The form also recalls Laffitteina (a Maastrichtian genus) but it lacks the double septa and the ramifying interseptal canals. Urnummulites differs from all the representatives of Rotaliidae by the presence of the septal filaments. The form is believed to be the ancestor of Nummulites.
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