Table 1. Substitution rate of LASV in M. natalensis and age of main clades.

Model	Molecular clock/codon partition	AICM value	Substitution rate, median (95% HPD) [mutation x position–1 year–1]	Root age, median (95% HPD) [years]	Faranah II cluster age, median (95% HPD) [years]	Faranah III cluster age, median (95% HPD) [years]
#1	Strict/no partition	11836	8.93 (6.70–11.35) × 10–4	83.5 (60.1–113.2)	55.3 (41.4–73.3)	44.7 (34.3–57.4)
#2	Strict/codons 1, 2, 3	11523	8.91 (6.78–11.25) × 10–4	84.9 (60.7–114.0)	56.0 (41.1–73.8)	45.5 (35.3–58.0)
#3	Relaxed lognormal/no partition	11911	8.89 (6.67–11.43) × 10–4	84.7 (57.4–119.0)	56.1 (39.3–76.2)	45.7 (34.5–59.4)
#4	Relaxed lognormal/codons 1, 2, 3	11535	8.89 (6.42–11.31) × 10–4	86.2 (59.4–126.3)	56.4 (39.2–77.3)	46.0 (34.0–60.0)

Analysis was performed using GTR + gamma and constant population size.

Abbreviations: 95% HPD, Highest Posterior Density interval contains 95% of the posterior probability distribution; AICM, model evaluation using Akaike’s information criterion through Markov chain Monte Carlo. Lower values indicate a better fit to the data.