Table 2.

Divergence-date priors for primary (top) and secondary (bottom) calibrations. Node numbers correspond to those indicated in Fig. S2. The translated log-normal (TL) zero-offset is presented in millions of years ago (Mya), parameter values (mean and standard deviation) follow in parentheses, and posterior (calculated) ages are presented as median with 95% confidence interval in parentheses.

PRIMARY CALIBRATIONS
Node	TL zero-offset (mean, SD)	Median (95% CI)	Source
1	238 (1.4, 0.7)	242 (239.4–249.6)	Fossil rhynchocephalian from Middle Triassic (Jones et al., 2013)
2	161 (1.8, 1.0)	167 (162.2–192.3)	Stem scincomorph Balnealacerta from Middle Jurassic (Evans, 1998)
3	110 (1.8, 1.3)	116 (110.7–161.3)	Stem teiids (e.g. Ptilodon) from Early Cretaceous (Nydam and Cifelli, 2002; Winkler et al., 1990)
4	61 (1.6, 0.8)	66.1 (62.4–80)	Fossil amphisbaenian Plesiorhineura tsentasi from Middle Paleocene (Sullivan, 1985)
5	128 (1.0, 0.5)	130.7 (129.2–134.2)	Fossil lizard Dalinghosaurus longidigitus from Early Cretaceous (Evans and Wang, 2005)
6	70 (1.8, 1.0)	76.1 (71.2–101.3)	Fossil anguid Odaxosaurus from Late Cretaceous (Sullivan and Lucas, 1996)
7	70 (1.8, 1.0)	76.1 (71.2–101.3)	Stem acrodont iguanian clade Priscagaminae from Late Cretaceous (Keqin and Norell, 2000)
8	70 (1.2, 1.9)	73.3 (70.2–145.6)	Fossil pleurodont iguanian Saichangurvel from Late Cretaceous (Conrad and Norell, 2007)
9	99 (1.0, 0.5)	101.7 (100.2–105.2)	Stem chameleon from Albian-Cenomanian boundary, Cretaceous (Daza et al., 2016)
SECONDARY CALIBRATIONS
Node	TL zero-offset (mean, SD)	Median (95% CI)	Source
10	62.8 (1.0, 0.5)	64.8 (63.3–68.3)	Node 1 by codon in Table S4 (Tolley et al., 2013)
11	51.2 (1.0, 0.5)	53.9 (52.4–57.4)	Node 2 by codon in Table S4 (Tolley et al., 2013)
12	47.5 (1.0, 0.5)	50.2 (48.7–53.7)	Node 3 by codon in Table S4 (Tolley et al., 2013)
13	45.6 (1.0, 0.5)	48.3 (46.8–51.8)	Node 4 by codon in Table S4 (Tolley et al., 2013)
14	33.4 (1.0, 0.5)	36.1 (34.6–39.6)	Node 5 by codon in Table S4 (Tolley et al., 2013)