Article: Cretaceous and Palaeocene species of the ostracod Hornibrookella from Saudi Arabia

Seven new species of the ostracod genus Hornibrookella are described and illustrated from the uppermost Maastrichtian and Palaeocene of eastern Saudi Arabia: Hornibrookella cyclifossata, H. cyclopea, H. cuspidata, H. divergens, H. episcelis, H. posterisella, and H. quinquecellulosa. They occur at earlier horizons than species of the genus described from Europe and Pakistan. A modification of the Liebau diagram has been adopted for the analysis of the ornament.