Table 1.

Inversion median and breakpoint scores for different hypotheses about the phylogenetic placement of Xenoturbella.

Abbreviation	Hypotheses	Inversion Median	Breakpoint
X1	basal vertebrate	401	597
X2	basal cephalochordate	403	602
X3	basal chordate	406	607
X4	basal ambulacrarian	403	602
X5	basal echinoderm	402	593
X6	Basal hemichordate	398	580
X7	basal bilaterian/protostome/deuterostome	398	587
X8	mollusc, order Nuculoida	406	608
X9	basal lophotrochozoan	404	600
X10	basal ecdysozoan	407	607

Lower scores are better. Best scores are shown in bold.