Figure 3. Biostratigraphy and biochronology of ratite eggshells from Africa. Diamantornis laini is here reported from the Arabian Peninsula. Dashed lines represent tentative age ranges. d: pore diameters; th: shell thicknesses. Black circles and rectangles represent maximum pore diameter sizes and maximal shell thicknesses, respectively, at natural size. Data from Senut 2000; Harrison and Msuya 2005; Stidham 2004.