Figure 5From: Phylogenetic position of a whale-fall lancelet (Cephalochordata) inferred from whole mitochondrial genome sequencesDivergence time estimation of lancelets based on nonparametric rate smoothing (NPRS) method. Ultrametric tree based on nonparametric rate smoothing (NPRS) analysis of the ML tree. Scale bar shows time scale resulting from calibration using the divergence time between Asymmetron and the other genera (162 Mya) [16]. Arrows indicate calibration points (open head), divergence time between A. inferum and A. lucayanum complex (red solid head), and first appearance of large whales (black solid head).Back to article page