Clade age vs. species richness in cichlid tribes with greater than or equal to 75 species.

<p>Area curves indicate 95% confidence intervals for upper and lower bounds of species diversity given clade age for A; low (<i>r</i> = 0.0828, <i>eps</i> = 0) and high (<i>r</i> = 0.062, <i>eps</i> = 0.9) relative rates of extinction (<i>eps</i>) given a constant net rate of diversification (<i>r</i>) across cichlids, and B; the estimated background rate of diversification (<i>r</i> = 0.069) and relative rate of extinction (<i>eps</i> = 0.41) from the MEDUSA analysis (Fig. 2). White circles indicate the mean clade age for each tribe from the temporal hypothesis of cichlid evolutionary relationships (Fig. 1). Lineages appearing to the left of the curves indicate exceptional species richness given clade age.