Table 1. Results of Bayesian credible set hypothesis testing.

Hypothesis	COI Clade in 95% Credible Set (53,413 trees)	28S Clade in 95% Credible Set (79,630 trees)	ConcatenationClade in 95% Credible Set (42 trees)
Monophyly western A. janus	NO - 0 trees	YES – 79488 trees	Not tested – too few samples
Monophyly western A. californicus	NO - 0 trees	NO - 0 trees	Not tested – too few samples
Monophyly western A. erebus	NO - 0 trees	NO - 0 trees	Not tested – too few samples
Monophyly A. janus	NO - 0 trees	YES – 48838 trees	NO - 0 trees
Monophyly A. californicus+A. gnomus	YES - 853 trees	YES – 79278 trees	YES – 42 trees