Table 1.

Parameter estimates and support for each model. σ², evolutionary rate; Θ, root state; t_shift, timing of the rate/mode shift; lnL, log-likelihood; k, number of free parameters; AICc, sample-size corrected Akaike information criterion; ΔAICc, difference in the AICc; w_i, Akaike weight; n.a., not applicable.

	σ2	Θ	parameter	tshift (Ma)	lnL	k	AICc	ΔAICc	wi
Balaenoptera cf. musculus 1.37 Ma, Peruvian specimens excluded
BM	0.00294	2.68	n.a.	n.a.	43.99	2	−83.81	6.28	0.04
AC/DC	0.00190	2.67	0.018	n.a.	44.28	3	−82.23	7.87	0.02
trend	0.00280	2.65	0.006	n.a.	44.67	3	−83.00	7.09	0.03
OU	0.00294	2.68	0.000	n.a.	43.99	3	−81.65	8.44	0.01
temp.-dep. rates	0.00076	2.68	0.002	n.a.	44.27	3	−82.20	7.89	0.02
rate shift	0.00232	2.67	0.003	19.92	44.18	4	−79.79	10.31	0.01
mode shift	0.00232	2.67	0.050	3.62	49.33	4	−90.09	0.00	0.88
Balaenoptera cf. musculus 1.37 Ma, Peruvian specimens included
BM	0.00338	2.69	n.a.	n.a.	40.37	2	−76.59	3.25	0.13
AC/DC	0.00218	2.67	0.019	n.a.	40.68	3	−75.04	4.80	0.06
trend	0.00330	2.66	0.005	n.a.	40.73	3	−75.14	4.70	0.06
OU	0.00338	2.69	0.000	n.a.	40.37	3	−74.43	5.41	0.04
temp.-dep. rates	0.00177	2.69	0.002	n.a.	40.49	3	−74.66	5.18	0.05
rate shift	0.00187	2.66	0.004	17.93	41.18	4	−73.82	6.02	0.03
mode shift	0.00287	2.68	0.054	3.00	44.19	4	−79.84	0.00	0.64