Positions of the extended slow rotator sequences of NGC 3532 (black) and the coeval Pleiades and NGC 2516 (green). Both sequences consist of true slow rotators (squares) and gap stars (circles) meaning that each sequence consists of two populations: true slow rotators and stars still in transition. The orange lines are lines of equal Rossby number and describe the position and rotational state of the two populations in the CPD. The dotted line shows Ro = 0.06 and describes the position of the rotational gap in Barnes (2010). The orange dashed line is at Ro = 0.12, approximately the Rossby number representing the slow rotator sequence in NGC 3532.