Table 1.

Sensitivity analyses of parsimony network results for two cowrie genera in which errors can (Palmadusta) or cannot (Cribrarula) be reduced to zero by choosing a probability of parsimony different from the default value of 0.95 (bold); and summed across 15 well-sampled genera (Bistolida, Cribrarula, Cypraeovula, Erosaria, Erronea, Leporicypraea, Luria, Lyncina, Mauritia, Monetaria, Notadusta, Ovatipsa, Palmadusta, Pustularia and Zoila) that included one or more false-negative ESUs or false-positive subnetworks. (No errors were found in four additional genera (Cypraea, Notocypraea, Talostolida and Purpuradusta). Adapted from Meyer & Paulay (2005).)

group	probability of parsimony
	0.90	0.91	0.92	0.93	0.94	0.95	0.96	0.97	0.98	0.99
Palmadusta (16 ESUs)
false negatives	5	5	5	4	3	2	1	0	0	0
false positives	0	0	0	0	0	0	0	0	0	8
total errors	5	5	5	4	3	2	1	0	0	8
Cribrarula (18 ESUs)
false negatives	9	7	7	6	6	5	5	5	3	3
false positives	0	0	0	0	0	0	0	0	0	3
total errors	9	7	7	6	6	5	5	5	3	6
15 genera (178 ESUs)
false negatives	55	50	50	46	42	35	31	29	25	20
false positives	2	2	2	2	3	3	4	6	14	54
total errors	57	52	52	48	45	38	35	35	39	74