Table 1.

Parameter estimates and AIC scores for four model fits to the complete dataset and subsets

All datasets: microevolutionary, fossil, and phylogenetic
Model	Parameter estimates		Inverse of rate parameters	AIC
Bounded evolution				−2940.53
Brownian motion				−7877.97
Single-burst				−9018.03
Multiple-burst				−9142.54

Multiple-burst model fit to subsets of the data
Dataset	Parameter estimates
Microevolutionary and fossil
Phylogenetic

In all models, SDs are in units of the natural log size difference. The inverse of the rate parameters (1/λ) for the exponential distribution and Poisson distribution in the single-burst and multiple-burst models, respectively, can be interpreted as the average number of years until a displacement. The lowest AIC score was for the multiple-burst model.