transition posterior probabilities for Drosophila data. Graphical representation of the posterior probabilities of the changepoint locations inferred with the novel . The transition posterior probabilities (vertical axis) are plotted against the time axis (horizontal axis). The time axis has been ticked at the three real morphological stage transitions: embryonic to larval (), larval to pupal (), and pupal to adult (). We note that the BDM model is based on a free individual allocation of time points so that a transition posterior probability plot cannot be interpreted properly.