Newstead (1922) described the older adult females as hemispherical or narrowly oval and highly convex; margin very thick, forming a distinct, round molding or bead. Color rich, dark castaneous; immature examples dusky buff. Young adults are described more or less flat and dusky buff or pale ochreous. Without wax on dorsum; without an ovisac. Occurring on stems and fruit.
This species was intercepted 3 times at U. S. ports-of-entry between 1995 and 2012, with specimens originating from Guinea, Kenya, and Nigeria. We also have examined specimens taken in quarantine from Congo (Cola); Morocco (Mangifera); Nigeria (Theobroma, unknown fruit). ScaleNet lists hosts in 17 plant families and most interceptions have been on Mangifera. ScaleNet distribution records for U. catori include only the Afrotropical region. Two other species of Udinia have been taken in quarantine in addition to U. catori (Green) and U. farquharsoni: U. pattersoni Hanford (Cameroon, on Coffea); and U. setigera Newstead (Côte D`Ivoire, on Mangifera).