Same MST as in Fig. 4. Upper panel: Rankin classification scheme. (See Sect. 4 for details.) Grey borders correspond to pulsars without a clear prior classification in the reference papers; classified here using the method described in Sect. 4. To simplify classification interpretation, instead of using a colour bar to display DTW distance between neighbouring vertices, we display w directly below each branch. Lower panel: Relation between pulsar positions in the tree and in P−Ṗ space. The box colour results from mapping P, Ė, and B (Fig. 1) to the red, green, and blue (RGB) channels, respectively.